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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 12, N° 1Mention de date : 01/2015Paru le : 14/02/2015 |
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Ajouter le résultat dans votre panierOrganic–inorganic hybrid sol–gel coatings for metal corrosion protection : a review of recent progress / R. B. Figueira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Organic–inorganic hybrid sol–gel coatings for metal corrosion protection : a review of recent progress Type de document : texte imprimé Auteurs : R. B. Figueira, Auteur ; C. J. R. Silva, Auteur ; E. V. Pereira, Auteur Année de publication : 2015 Article en page(s) : p. 1-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
Anticorrosion
Cuivre
Fer
MagnésiumLe magnésium est l'élément chimique de numéro atomique 12, de symbole Mg.
Le magnésium est un métal alcalino-terreux. Il s’agit du neuvième élément le plus abondant de l'univers
. Il est le produit, dans de grandes étoiles vieillissantes, de l'addition séquentielle de trois noyaux d'hélium à un noyau carbo. Lorsque de telles étoiles explosent en tant que supernovas, une grande partie du magnésium est expulsé dans le milieu interstellaire où il peut se recycler dans de nouveaux systèmes stellaires. Le magnésium est le huitième élément le plus abondant de la croûte terrestreet le quatrième élément le plus commun de la Terre (après le fer, l'oxygène et le silicium), constituant 13 % de la masse de la planète et une grande partie du manteau de la planète. C'est le troisième élément le plus abondant dissous dans l'eau de mer, après le sodium et le chlore.
Les atomes de magnésium existent dans la nature uniquement sous forme de combinaisons avec d'autres éléments, où il présente invariablement l'état d'oxydation +2. L'élément pur est produit artificiellement par réduction ou électrolyse. Il est hautement réactif en poudre et en copeaux mais, laissé à l'air libre, il se revêt rapidement d'une mince couche d'oxyde étanche réduisant sa réactivité (passivation par oxydation). Le métal pur brûle aisément sous certaines conditions (en produisant une lumière brillante, blanche, éblouissante caractéristique). En mécanique il est utilisé principalement comme composant dans les alliages d'aluminium-magnésium (parfois appelés magnalium). Le magnésium est moins dense que l'aluminium et l'alliage est apprécié pour sa légèreté et sa résistance plus grande (mécanique et chimique). (Wikipedia)
Matériaux hybrides
Métaux -- Revêtements protecteurs
SiloxanesLes siloxanes sont une classe de composés du silicium dont la formule empirique est R2SiO, où R est un groupe radical qui peut être organique. Des exemples représentatifs sont [SiO(CH3)2]n (diméthylsiloxane) et [SiO(C6H5)2]n (diphénylsiloxane), où n est typiquement supérieur à 4. Ces composés peuvent être des hybrides organiques et inorganiques. Les chaînes organiques confèrent au composé des propriétés hydrophobes alors que la chaîne principale -Si-O-Si-O- est purement inorganique.
Le mot siloxane est dérivé de Silicium, Oxygène et alkane.
Des siloxanes peuvent être trouvés dans des produits tels que des cosmétiques, des déodorants, des enduits hydrophobes pour pare-brise, des peintures et certains savons.
Les siloxanes polymérisés (polysiloxanes) sont appelés silicones1,2.
Le siloxane est massivement utilisé dans l'industrie cosmétique (rouges à lèvre, conditionneurs et shampooings, déodorants, etc.).
Une application récente du Siloxane D5 (2001) a été trouvée dans le nettoyage à sec des textiles en remplacement du perchloroéthylène. Ce procédé est très répandu aux États-Unis et au Royaume-Uni. Il devient de plus en plus courant en Europe continentale dont la France, afin de promouvoir l'usage de procédés écologiques et respectueux de la santé humaine.
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : This paper is a review of the most recent and relevant achievements (from 2001 to 2013) on the development of organic–inorganic hybrid (OIH) coatings produced by sol–gel-derived methods to improve resistance to oxidation/corrosion of different metallic substrates and their alloys. This review is focused on the research of OIH coatings based on siloxanes using the sol–gel process conducted at an academic level and aims to summarize the materials developed and identify perspectives for further research. The fundamentals of sol–gel are described, including OIH classification, the interaction with the substrate, their advantages, and limitations. The main precursors used in the synthesis of OIH sol–gel coatings for corrosion protection are also discussed, according to the metallic substrate used. Finally, a multilayer system to improve the resistance to corrosion is proposed, based on OIH coatings produced by the sol–gel process, and the future research challenges are debated. Note de contenu : - SOL-GEL PROCESS FUNDAMENTALS AND OIHs CLASSIFICATION :
- SOL-GEL COATINGS FOR METALS : Organic-inorganic hybrid (OIH) sol-gel coatings for corrosion protection - OIH coatings for corrosion protection of iron-based alloys - OIH coatings for corrosion protection of copper-based alloys - OIH coatings for corrosion protection for zinc-based alloys HDGS - OIH coatings for corrosion protection of magnesium-based alloys
- LIMITATIONS OF ORGANIC-INORGANIC HYBRID SOL-GEL COATINGS FOR CORROSION PROTECTION
- FUTURE AND RESEARCH CHALLENGES ON ORGANIC-INORGANIC HYBRID MATERIALS FOR CORROSION PROTECTIONDOI : 10.1007/s11998-014-9595-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9595-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23204
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Hybrid antireflection structure with moth eye and multilayer coating for organic photovoltaics / Shigeru Kubota in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Hybrid antireflection structure with moth eye and multilayer coating for organic photovoltaics Type de document : texte imprimé Auteurs : Shigeru Kubota, Auteur ; Kensaku Kanomata, Auteur ; Takahiko Suzuki, Auteur ; Bashir Ahmmad, Auteur ; Fumihiko Hirose, Auteur Année de publication : 2015 Article en page(s) : p. 34-47 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Matériaux organiques
Photopiles
Revêtement antireflet
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : We propose a hybrid antireflection structure (ARS), which integrates moth eye texturing and multilayer interference coating, to improve efficiency of organic photovoltaic (OPV) solar cells. We perform nearly global optimization of the geometric parameters characterizing the hybrid ARS, by using optical simulations based on the finite-difference time-domain method. The proposed optimization algorithm consists of two steps: in the first step, only the moth eye structure is globally optimized and, in the second step, the whole hybrid structure is optimized efficiently based on the results of the first step. Thus, the optimal moth eye structure is additionally obtained as an intermediate result. By applying this optimization method to an organic thin film solar cell, we show that the short-circuit current density (J SC) is increased by 8.90% with the moth eye structure and by 9.89% with the hybrid ARS. We also study the sensitivity of photocurrent to the geometric parameters of hybrid ARS, and the change in the spatial distribution of electric field intensity by the ARS. The results show that the hybridization of the two types of light trapping techniques is effective to reduce the inhomogeneity in the electric field distribution and obtain higher electric intensity in almost the whole active layer. The design concept of the hybrid ARS is quite useful for improving light trapping in OPVs and allows for extending the options available for broadband antireflection. Note de contenu : - EXPERIMENTAL : Optical model - Optimization algorithm
- RESULTS AND DISCUSSION : Optimization of hybrid ARS - Optical properties of the optimized ARSDOI : 10.1007/s11998-014-9614-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9614-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23205
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Statistical modeling of coating lifetimes in disparate environments / Mark E. Nichols in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
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Titre : Statistical modeling of coating lifetimes in disparate environments Type de document : texte imprimé Auteurs : Mark E. Nichols, Auteur ; Jacqueline Frey, Auteur Année de publication : 2015 Article en page(s) : p. 49-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Automobiles -- Revêtements:Automobiles -- Peinture
Délaminage
Durée de vie (Ingénierie)
Etudes comparatives
Revêtements -- Détérioration:Peinture -- Détérioration
Revêtements -- Effets du climat
Revêtements -- Fissuration:Peinture -- FissurationIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of environmental loads on the propensity for failure of automotive coating systems was evaluated for both the United States and China. Population weighted climate distribution functions were created for both nations and applied to various failure modes including yellowing or color change, gloss loss, delamination, and cracking. The effect of process variability on specific failure modes was captured through the use of minimum and maximum film builds measured on vehicles produced in a commercial automotive assembly plant. The U.S. was shown to be a significantly harsher environment for most failure modes driven by UV radiation and high temperatures. China was shown to be a harsher environment for failure modes driven by liquid water and cold temperatures. The use of these models allowed for the prediction of regional failure rates given the time to failure of a coating of known thickness in a different location. Note de contenu : - DATA COLLECTION
- FAILURE MODELS : UV radiation-induced failures - UV and temperature-induced failures - UV-induced failure with thickness dependent absorption - UV plus thickness-induced cracking induced failure - Gloss loss failures - Denver cracking failures - DISCUSSION : Effect of coating thickness distribution - Other failure modes - Implications for weathering exposureDOI : 10.1007/s11998-014-9624-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9624-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23206
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Analysis of influencing parameters in deformable roll coating of counter-rotating rolls / Bettina Grashof in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Analysis of influencing parameters in deformable roll coating of counter-rotating rolls Type de document : texte imprimé Auteurs : Bettina Grashof, Auteur ; Antonio Delgado, Auteur Année de publication : 2015 Article en page(s) : p. 63-73 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mathématique
Caoutchouc
Déformations (mécanique)
Enduction au rouleauIndex. décimale : 667.9 Revêtements et enduits Résumé : Roll coating is a comparatively simple and common technology for coating of continuous substrates like paper, coils, or foils, where the fluid is metered through the gap between two rolls. Rolls wrapped with a deformable rubber layer enable a precise metering for low fluid amounts and lead additionally to higher process stability. Many efforts have been made to investigate the influencing factors of deformable roll coating by experimental and numerical methods. Beside configurations with positive gaps, which are comparable to rigid roll setups, negative gaps, where only the elasticity of the rubber layer prevents overlapping of the rolls, are of interest as such configurations enable thin liquid layers. The main influencing factors on the volume flow rate through the gap are viscosity, average velocity, effective radius, Young’s modulus, load or pre-set gap height, and partly rubber thickness, when an influence of the layer height is assumed. The dependency is often given in empirically or numerically based power law relationships. In contrast to this, in the present study, an analytically based solution is used to investigate the influencing factors in deformable roll coating with negative gaps. This continues the authors' previous work, in which the analytical solution was derived. As a result, a general agreement with numerical and experimental results from literature is found. Additionally, the analytical approach allows for the first time the ability to quantify further trends. The proposed power law exponent for the dimensionless load and elasticity numbers from literature cannot be considered as constant in the whole common application range of roll coating but remarkable trends appear. Additionally, a new criterion for the critical rubber cover thickness is developed analytically which describes the limit value of the negligible influence of the rubber cover thickness on the volume flow rate. The present investigation enables the explanation of different literature results and offers a more general view in the understanding of roll coating processes. Note de contenu : - THEORETICAL MODEL AND SOLUTION METHOD
- RESULTS OF ANALYTICAL PREDICTIONS : Scope of application - Influence of load - Influence of elasticity number - Influence of the rubber cover thicknessDOI : 10.1007/s11998-014-9629-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9629-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23207
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Sol-gel route to ceria coatings on AA2024-T3 aluminum alloy / Min Zuo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Sol-gel route to ceria coatings on AA2024-T3 aluminum alloy Type de document : texte imprimé Auteurs : Min Zuo, Auteur ; Tingting Wu, Auteur ; Kegeng Xu, Auteur ; Shiquan Liu, Auteur ; Degang Zhao, Auteur ; Haoran Geng, Auteur Année de publication : 2015 Article en page(s) : p. 75-83 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Anticorrosion
Bain de trempe
Dip-coating
Oxyde de cérium
Revêtements protecteurs
Sol-gel, Procédé
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : The ceria coating was studied as an efficient alternative to the chromate protective coating of aluminum alloys. The environmentally friendly inhibitor of cerium ion was incorporated into the surface coating using Ce(NO3)3 as precursor via a sol–gel route. The coatings were analyzed with FESEM and EDS. The anticorrosion performance evaluation of the coatings was carried out using electrochemical methods and full immersion experiments. Under the conditions of surface pretreatment with 15 wt% NaOH solution for 20 s, a sol reaction time of 2 h and 3–5 times of dip-coating, the uniform ceria coatings with low defect and barrier were successfully synthesized. After the full immersion process, pitting holes containing copper-rich phases were detected on the surface of the uncoated sample. In contrast, such holes were not observed on the coated sample. Furthermore, the I corr values of the coated samples were smaller than that of the uncoated one, which confirms that the coatings provide a considerable protection barrier and promote the anticorrosion performance of aluminum alloys. Note de contenu : - Effect of surface pretreatment time
- Effect of reaction time of the sols
- Effect of dip-coating time
- Effect of anticorrosion ceria coatingDOI : 10.1007/s11998-014-9621-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9621-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23208
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Scratch and recovery characteristics of automotive clearcoats containing blocked polyisocyanate crosslinkers / Seung Man Noh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Scratch and recovery characteristics of automotive clearcoats containing blocked polyisocyanate crosslinkers Type de document : texte imprimé Auteurs : Seung Man Noh, Auteur ; Joon Hyun Nam, Auteur ; Jung Kwon Oh, Auteur ; Hyun Wook Jung, Auteur Année de publication : 2015 Article en page(s) : p. 85-95 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Vernis
Caractérisation
Echantillonnage
Polyisocyanates
Polymères à silane modifié
Résistance à l'abrasion
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Scratch characteristics and self-recovery behaviors of automotive clearcoats including newly designed silane-modified blocked polyisocyanate (SMBI)1 as an organic–inorganic hybrid crosslinker were compared with those with the commercially well-known crosslinkers such as blocked HDI-based and blocked IPDI-based polyisocyanates. To extensively scrutinize the effects of various crosslinkers with different chemical structures on the chemical and mechanical properties of clearcoats themselves, rigid-body pendulum tester analysis, creep-recovery analysis, and FTIR analysis were performed, resulting in a noticeable variation in curing features and crosslinking networks. Employing the overall coating systems by depositing clearcoats with different crosslinkers above the same undercoats on galvanized steel, the scratch behaviors on the surface of the outermost clearcoat layer were examined via the nano-scratch tester for scratch depth profiles and atomic force microscopy for three-dimensional scratch images, under various self-reflow temperatures and duration time periods. The results demonstrated that the SMBI crosslinker induced a considerably higher degree of crosslinked networks, through the reaction of urethane bonds and silanol bonds in clearcoats, in comparison with the blocked HDI and IPDI polyisocyanates. Also, the recoverable behaviors of scratched clearcoats containing different blocked polyisocyanates were affected by the intrinsic chemical structures of crosslinkers, as well as scratch-recovery conditions such as external temperatures and duration times. Note de contenu : - EXPERIMENTAL : Preparation of clearcoat samples - Characterization methods
- RESULTS AND DISCUSSION : Curing analysis by RPT - FTIR analysis - Creep-recovery properties - Scratch resistance and recovery characteristicsDOI : 10.1007/s11998-014-9617-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9617-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23209
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and performance of new modified reactive flame-retardant alkyd resin based on tetrabromophthalic anhydride as varnish for surface coatings / H. Abd El-Wahab in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Synthesis and performance of new modified reactive flame-retardant alkyd resin based on tetrabromophthalic anhydride as varnish for surface coatings Type de document : texte imprimé Auteurs : H. Abd El-Wahab, Auteur ; M. Abd El-Fattah, Auteur ; N. Abd El-Khalik, Auteur ; Algy Kazlauciunas, Auteur Année de publication : 2015 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydride tétrabromophtalique
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Polyalkydes
Vernis -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : There exist two distinct approaches to achieving flame retardancy in polymers, namely the additive type and the reactive type. In this case, new modified reactive flame-retardant (FR) alkyd resins (short, medium, and long oil alkyd) were produced by means of a condensation polymerization reaction between a linseed oil fatty acid and glycerol, to produce the monoglyceride as the ingredient source of the polyol used. This then reacted with phthalic anhydride, which was partially replaced with tetrabromophthalic anhydride (TBPA), as the ingredient source of the dibasic acid. The resulting resin was characterized using FTIR and 1H NMR spectral studies. The coatings of 50 ± 5 µm thickness were applied to the surface of wood, glass panels, and mild steel strips by means of a brush. The fire retardant capacity of the modified reactive FR alkyd resins was assessed using the limiting oxygen index (LOI) test. The physical, mechanical, and chemical properties were also examined to evaluate any drawbacks associated with the modification. The results of the LOI test indicate that the modified reactive FR alkyd resins exhibit an improved flame retardancy effect following an increase in the TBPA content within the alkyd resin backbone structure. Improvement to the mechanical properties of the modified resins was also observed, but chemical resistance was not significantly changed. Finally, the prepared reactive FR alkyd resins were observed to overcome a range of problems that weaken the attraction of additive FRs namely, poor compatibility, leaching, and the reduction in mechanical properties. DOI : 10.1007/s11998-014-9615-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9615-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23210
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Characterization and corrosion protection properties of composite material (PANI+TiO2) coatings on A304 stainless steel / Souhila Abaci in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Characterization and corrosion protection properties of composite material (PANI+TiO2) coatings on A304 stainless steel Type de document : texte imprimé Auteurs : Souhila Abaci, Auteur ; Belkacem Nessark, Auteur Année de publication : 2015 Article en page(s) : p. 107-120 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier inoxydable
AcierL'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Caractérisation
Dioxyde de titane
Métaux -- Revêtements protecteurs
pH
Polyaniline
Résistance chimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : This work presents the corrosion protection behavior of A304 stainless steel in an acidic medium by using coatings based on polyaniline+TiO2 composite material. The influence of parameters such as concentration of aniline, TiO2 content, and pH of the solution were investigated. The coatings which had been deposited by cyclic voltammetry on substrates of A304 steel were then characterized by electrochemical impedance spectroscopy. The cyclic voltammograms showed three redox couples characteristic of the different oxidation and reduction states of the produced polymer. PANI+TiO2 composite material was observed to exhibit higher corrosion resistance and better properties. The effectiveness of coatings in preventing corrosion was tested by potentiodynamic polarization studies and scanning electron microscopy was used to characterize the morphology of the coatings. The results showed that PANI+TiO2 coatings offer good anticorrosion protection to steel in 1 M H2SO4 solutions. The micrograph taken at the coatings surface showed that (PANI+TiO2)/A304 composite was uniform in nature and TiO2 particles were uniformly covered by PANI. After immersion into a corrosive solution for 45 min, no aggressive effect was observed and the coating films were still present. Moreover, the formation of PANI+TiO2 composite was also confirmed by EDX. Furthermore, it was found that the presence of a low amount of TiO2 in PANI coatings afforded the best protection due to the formation of a coating layer on the metallic surface which behaved like a physical barrier against the aggressive medium attack. Note de contenu : - EXPERIMENTAL : Materials - Methods and electrodeposition of PANI+TiO2 composite film - Characterization techniques
- RESULTS AND DISCUSSION : Electropolymerization of aniline in H2SO4 environment on an A304 stainless steel electrode - Effect of TiO2 content in the film deposited on 1304 stainless steel - Effect of the aniline concentration on stainless steel - Protection of the stainless steel by the polyaniline modified by the incorporation of TiO2 (Tafel polarization curves) - Study by impedance spectroscopy of the electrode modified (PANI+TiO2)/A304 - Morphological characterizaton of the steel, PANI, and composite films by SEM - Chemical analysis of the composites by EDXDOI : 10.1007/s11998-014-9611-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9611-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23211
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible A quantitative study of nanoparticle release from nanocoatings exposed to UV radiation / Lipiin Sung in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
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Titre : A quantitative study of nanoparticle release from nanocoatings exposed to UV radiation Type de document : texte imprimé Auteurs : Lipiin Sung, Auteur ; Deborah Stanley, Auteur ; Justin M. Gorham, Auteur ; Savelas Rabb, Auteur ; Xiaohong Gu, Auteur ; Lee L. Yu, Auteur ; Tinh Nguyen, Auteur Année de publication : 2015 Article en page(s) : p. 121-135 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Essais accélérés (technologie)
Matériaux hybrides
Microscopie à force atomique
Morphologie (matériaux)
Nanoparticules
Nanoparticules -- Aspect de l'environnement
Photodétérioration
Revêtements -- Détérioration:Peinture -- Détérioration
Revêtements -- Effets du rayonnement ultraviolet
Risques pour la santé
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Surfaces (Physique)Index. décimale : 667.9 Revêtements et enduits Résumé : Nanoparticles are increasingly used in polymer coatings (i.e., nanocoatings) to improve multiple properties including the mechanical, electrical, gas barrier, and ultraviolet (UV) resistance of traditional coatings. These high performance nanocoatings are often used in outdoor environments. However, because polymers are susceptible to degradation by weathering elements, nanoparticles in a nanocoating may be released into the environment during its life cycle, which potentially poses an environmental health and safety concern and may hinder application of these advanced coatings. This study presents protocols and experimental technique to quantify the release of nanosilica from epoxy nanocoating as a function of UV exposure. Specimens of an epoxy coating containing 5% untreated nanosilica in specially designed holders were exposed to UV radiation (295–400 nm) in a well-controlled high-intensity UV chamber. Exposed specimens were removed at specified UV dose intervals for measurements of coating chemical degradation, mass loss, nanosilica accumulation on specimen surface, and nanosilica release as a function of UV dose. Measurement of nanosilica release was accomplished by (a) periodically spraying UV-exposed specimens with water, (b) collecting runoff water/released particles, and (c) analyzing collected solutions by inductively coupled plasma-optical emission spectrometry using a National Institute of Standards and Technology (NIST)-developed protocol. Results demonstrated that the amount of nanosilica release was substantial and increased rapidly with UV dose. Mass loss, chemical degradation, and silica accumulation on specimen surface also increased with UV dose. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and preparation of nanocoating - Characterizations of nanocoating degradation
- RESULTS : Chemical degradation of nanocoating exposed to UV - Mass loss - Surface morphological changes in nanocoating - Quantifying the amount of nanosilica release from nanocoating exposed to UVDOI : 10.1007/s11998-014-9620-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9620-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23212
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Titanium dioxide/conducting polymers composite pigments for corrosion protection of cold rolled steel / Niteen G. Jadhav in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Titanium dioxide/conducting polymers composite pigments for corrosion protection of cold rolled steel Type de document : texte imprimé Auteurs : Niteen G. Jadhav, Auteur ; Victoria J. Gelling, Auteur Année de publication : 2015 Article en page(s) : p. 137-152 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosion
Conducteurs organiques
Dioxyde de titane
Matériaux hybrides
Métaux -- Revêtements protecteurs
Pigments
Polyaniline
Polymérisation par oxydation
Polypyrroles
Résistance chimique
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Titanium dioxide (TiO2)/conducting polymers composite pigments were synthesized by chemical oxidative polymerization technique in a simple and eco-friendly manner. These composite pigments were characterized for morphology by scanning electron microscopy and transmission electron microscopy, for conductivity by four point probe and conductive-atomic force microscopy, for elemental composition by X-ray photoelectron spectroscopy, and for chemical composition by Fourier transform infrared spectroscopy. Three different types of composite pigments were synthesized, namely TiO2/polypyrrole composite pigment, TiO2/polypyrrole composite pigment doped with tungstate anion, and TiO2/polyaniline composite pigment. Core and shell morphology was obtained for TiO2/polypyrrole composite pigment and TiO2/polypyrrole composite pigment doped with tungstate anion. Coatings based on these pigments were formulated and applied on a cold rolled steel substrate. Constant immersion in 5% sodium chloride was employed for studying the corrosion resistance offered by composite pigments-based coatings. The corrosion resistance of the coatings was monitored by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization technique. EIS results demonstrated increased corrosion protection for the core and shell TiO2/polypyrrole composite, TiO2/polypyrrole (tungstate doped) composite, and TiO2/polyaniline composite. Additionally, potentiodynamic scan results demonstrated passivation achieved by synthesized composite pigments-based coatings, suggesting improved corrosion protection. Note de contenu : - EXPERIMENTAL WORK : Materials - Synthesis of TiO2/PPy composite and TiO3/PPy (tungstate doped) composite - Synthesis of TiO2/PANI composite - Coatings preparation - Composite and coatings characterization
- RESULTS AND DISCUSSION : Morphology - Chemical composition - Conductivity - Electrochemical impedance spectroscopy (EIS) - Potentiodynamic scansDOI : 10.1007/s11998-014-9613-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9613-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23213
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of anticorrosion polyurethane paints and coatings based on novel Zn-free phosphates / Krzysztof Kowalczyk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Preparation and characterization of anticorrosion polyurethane paints and coatings based on novel Zn-free phosphates Type de document : texte imprimé Auteurs : Krzysztof Kowalczyk, Auteur ; Kinga Luczka, Auteur ; Barbara Grzmil, Auteur Année de publication : 2015 Article en page(s) : p. 153-165 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Brillance (optique)
Charges (matériaux)
Essais accélérés (technologie)
Métaux -- Revêtements protecteurs
Phosphate d'aluminiumLe phosphate d'ammonium est un composé chimique de formule (NH4)3PO4. Il s'agit d'un sel d'ammoniac NH3 et d'acide phosphorique H3PO4, constitué de cations ammonium NH4+ et d'anions phosphate PO43–. Il se forme à l'état de poudre cristalline lorsqu'on mélange deux solutions concentrées d'ammoniac et d'acide phosphorique : 3 NH3 + H3PO4 → (NH4)3PO4.
Il est soluble dans l'eau, et la solution aqueuse de phosphate d'ammonium libère de l'ammoniac lorsqu'on la chauffe.
Les autres sels d'ammoniac et d'acide phosphorique existent également : phosphate de diammonium (NH4)2HPO4 et phosphate de monoammonium NH4H2PO4. Ils peuvent être convertis l'un en l'autre avec le phosphate d'ammonium en ajoutant davantage d'ammoniac ou d'acide phosphorique selon les besoins.
Le phosphate d'ammonium est utilisé dans certains engrais comme source d'azote. Il est également employé comme retardateur de flamme dans la composition des thermoplastiques.
Phosphate d'ammonium
Phosphate de zinc
Polyuréthanes
Revêtement en phase solvant:Peinture en phase solvant
Revêtements bi-composant:Peinture bi-composant
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Novel aluminum ammonium phosphates (AAP) were tested as anticorrosion fillers in two-component solventborne polyurethane paints. Their properties were compared with microsized aluminum zinc phosphate (AZP) as well as with nanosized (nAP) and microsized (AP) aluminum phosphates. Generally, coating compositions containing AAP exhibited similar or slightly higher viscosity than the systems with AZP and AP. Moreover, cured polyurethane coats with AAP reached higher gloss and better adhesion to a steel substrate. The results of salt spray tests (2500 h) showed that anticorrosive properties of coats containing 10 wt% of AAP were similar or better than those noted for coats with 15.6 wt% of AZP or 13.7 wt% of AP. Electrochemical impedance spectroscopic tests revealed markedly higher barrier properties of coats with AAP in comparison to an AP-based sample. Note de contenu : - MATERIALS AND METHODS : Commercial materials - Phosphate fillers preparation - Paints preparation - Samples preparation
- TEST METHODS : Characterization of phosphate pigments - Characterization of coating compositions and cured paints
- RESULTS AND DISCUSSION : Phosphate fillers - Polyurethane paints and coats with phosphate fillersDOI : 10.1007/s11998-014-9612-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9612-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23214
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Coating potential of a new modified starch coating for immediate release oral tablets / Tareq A. Rumman in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Coating potential of a new modified starch coating for immediate release oral tablets Type de document : texte imprimé Auteurs : Tareq A. Rumman, Auteur ; Israa H. Al-Ani, Auteur ; Samira F. Hassan, Auteur Année de publication : 2015 Article en page(s) : p. 167-175 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique
Amidon modifié
Caractérisation
Comprimés
Couches minces
Couches minces -- Propriétés mécaniques
Diffusion (physique)
Dispersions et suspensions
Essais (technologie)
Hydroxypropyl méthylcellulose
Perméabilité
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Film coating of tablets is the application of a thin layer of coating material to improve the tablet properties. Different coating materials like hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol (PVA) have been widely used in tablet coatings for immediate release of the active pharmaceutical ingredient. A new immediate release film coating formula that contains modified corn starch as the coating polymer was investigated, and it shows improved physiochemical properties over conventional film coating material (HPMC and PVA). The purpose of this study is to investigate the potential of the new modified starch coating as a coating material in comparison with HPMC- and PVA-based formulas. Evaluation was done on a coating powder dispersion of 20% w/w by measuring the viscosity, sedimentation, foaming behavior, and microbial stability. Free films were prepared from each coating formula and tested for water vapor permeability and morphology. The coating process was then executed on the model tablets (levofloxacin 500 mg) after optimizing the coating parameters. Characterization of modified starch film-coated tablets was done by testing morphology, hardness, friability, thickness, disintegration, and drug release profiles. It was concluded that the new modified starch coating is superior to HPMC and PVA formulations in terms of free film and applied coated tablet esthetics, inner structure composition, preparation and coating process parameters. Additionally, the modified starch coating showed similar release profiles to HPMC- and PVA-based coating formulas. Note de contenu : - Coating dispersion study
- Free film analysis
- Coating process
- Characterization of coated tablets compared with uncoated tablets
- Drug release from modified starch-coated tablets in different storage conditionsDOI : 10.1007/s11998-014-9618-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9618-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23215
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible The effect of thermal radical initiator derived from O-imino-isourea on thermal curing characteristics and properties of automotive clearcoats / Ji Won Hwang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : The effect of thermal radical initiator derived from O-imino-isourea on thermal curing characteristics and properties of automotive clearcoats Type de document : texte imprimé Auteurs : Ji Won Hwang, Auteur ; Kyung Nam Kim, Auteur ; Seung Man Noh, Auteur ; Hyun Wook Jung, Auteur Année de publication : 2015 Article en page(s) : p. 177-186 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amorceurs (chimie)
Automobiles -- Vernis
HydroxyleEn chimie organique, un hydroxyle (ou oxhydryle) peut désigner deux entités.
Un groupement -OH, appelé aussi hydroxy, qui se rencontre en particulier dans les alcools et les phénols.
Un radical : HO^{\bullet}. Il est produit par exemple lors de réactions de dissociation de peroxydes, en présence d'ions de métaux de transition (Fe(II), Cu(I), réaction de Fenton), de chauffage ou de rayonnement.
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Méthacrylate d'uréthane
Oligomères
Polyaddition
Résistance à l'abrasion
Réticulation (polymérisation)
Rhéologie
Vernis -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Curing characteristics of melamine-based automotive clearcoats with or without thermal radical initiator (TRI) derived from an O-imino-isourea have been examined by means of their real-time rheological properties during a thermal curing process. By changing functionalities of reactive sites at hydroxyl groups and unsaturated double bonds in hydroxyl-functionalized urethane methacrylate oligomer as a main binder, the effect of TRI on various properties of thermally cured clearcoats has been compared by means of rheological, rigid-body pendulum, ultra nano-indentation, and nano-scratch tests. It was found that a small portion of TRI significantly enhanced the final elastic modulus of clearcoats with the lower content of hydroxyl groups and considerably shortened curing time, implying the formation of denser crosslinked networks inside clearcoats by the free-radical polymerization at relatively lower curing temperature. These results were directly linked with the improvement of their mechanical properties such as indentation hardness and scratch resistance. TRI plays a key role in desirably controlling the rheological and mechanical properties of clearcoats under insufficient thermal curing conditions. Note de contenu : - EXPERIMENTAL : Preparation of clearcoat samples - Characterization methods
- RESULTS AND DISCUSSION : Thermal characteristics of clearcoats - Comparison of elastic rheological data for clearcoats with or without TRI - Curing characteristics by RPT tests - Mechanical properties of cured clearcoatsDOI : 10.1007/s11998-014-9619-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9619-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23216
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Biobased reactive diluent for UV-curable urethane acrylate oligomers for wood coatings / Dipak S. Tathe in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Biobased reactive diluent for UV-curable urethane acrylate oligomers for wood coatings Type de document : texte imprimé Auteurs : Dipak S. Tathe, Auteur ; Ramanand N. Jagtap, Auteur Année de publication : 2015 Article en page(s) : p. 187-196 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Bois -- Revêtements
Chloroformiate d'allyle
Copolymère uréthane acrylate
Diluants
Huile de ricin et constituants
Oligomères
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Castor oil (CO)-based reactive diluent for UV-curable urethane acrylate oligomers was synthesized by the reaction of a CO with diethanolamine and the resultant product was subsequently reacted with allyl chloroformate. The reactive diluent was characterized by FTIR and 1H NMR techniques. This reactive diluent was incorporated in a urethane acrylate oligomer and photoinitiator at different weight fractions varying from 5 to 25 wt% for UV curing. The effects of reactive diluent concentrations on the viscosity of the formulations along with mechanical, chemical, and optical properties of UV-curable coatings were studied. Furthermore, the cured films were evaluated for glass transition temperature (T g) determined by differential scanning calorimetry and thermal stability by thermogravimetric analysis. Gel content and water absorption of UV-cured films were evaluated. Note de contenu : - EXPERIMENTAL : Material - Synthesis of diethanol fatty amide of castor oil (FACO) - Synthesis of triallyl format fatty amide (TFFA) - Formulation of UV-curable coating - Characterization - Testing of coatings
- RESULTS AND DISCUSSION : Physico-chemical analysis - FTIR analysis of CO, FACO, TFFA and UV-cured polymer - 1HNMR spectra of triallyl formate fatty amide (TFFA) - Effect of reactive diluent concentration on viscosity - Water absorption properties -Differential scanning calorimetry (DSC) - Thermogravimetric analysis of UV-cured films - Gloss of UV-cured coating - Coating propertiesDOI : 10.1007/s11998-014-9616-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9616-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23217
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of polyurethane acrylate modified by different contents of stearyl alcohol / Lili Qin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Synthesis and properties of polyurethane acrylate modified by different contents of stearyl alcohol Type de document : texte imprimé Auteurs : Lili Qin, Auteur ; Jun Nie, Auteur ; Yong He, Auteur Année de publication : 2015 Article en page(s) : p. 197-204 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Alcool stéarylique
Analyse thermomécanique dynamique
Chlorure de polyvinyle
Copolymère uréthane acrylate
Copolymères -- Propriétés mécaniques
Oligomères
Photoréticulation
Polycarbonates
Retrait volumique
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane acrylates (PUAs) modified by different amounts of stearyl alcohol were synthesized from stearyl alcohol (SA), isophorone diisocyanate, 2-hydroxyethyl acrylate, and polycaprolactone triol. The molecular structure was characterized by Fourier transform infrared spectroscopy. Real time infrared spectroscopy was used to investigate the kinetics of photopolymerization of synthesized PUAs. The volume shrinkage was measured by laser displacement sensor. The adhesion on glass, polycarbonate (PC), and polyvinyl chloride (PVC) was tested by the laser micrometer and universal testing machine. The glass transition temperature (T g) and storage modulus (E′) were measured by dynamic mechanical analyzer (DMA). The pendulum hardness, pencil hardness and flexibility were also measured. The results showed that the greater the amount of SA in synthesized PUAs, the lower the volume shrinkage and the better the adhesion to glass, PC, and PVC substrates. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Synthesis process of polyurethane acrylate (PUA) - Sample preparation
- RESULTS AND DISCUSSION : Characterization of PUA - Photopolymerization kinetics of synthesized oligomer - Volume shrinkage - Dynamic mechanical thermal properties - Mechanical propertiesDOI : 10.1007/s11998-014-9625-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9625-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23218
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Effect of ink transfer on print mottle in shrink films / Akshay V. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Effect of ink transfer on print mottle in shrink films Type de document : texte imprimé Auteurs : Akshay V. Joshi, Auteur ; Swati Bandyopadhyay, Auteur Année de publication : 2015 Article en page(s) : p. 205-213 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Films rétractables
Impression jet d'encre
Marbrures (défauts)
Plan d'expérience
Polyéthylène téréphtalate glycol
RotogravureIndex. décimale : 667.9 Revêtements et enduits Résumé : The gravure printing process is considered a pioneer in long run package printing jobs, offering exceptional print quality teamed with high quantities. Shrink films, primarily polyvinyl chloride (PVC) and polyethylene terephthalate-glycol modified (PET-G) are extensively printed using the rotogravure printing process. The intricacies of the printing process and the complex nature of the interactions between the substrate, ink, and printing press, if not studied and controlled, can contribute to unnecessary variation and degradation in print quality. Printability not only can be approximated in the dimensions of densitometry and spectrophotometry, but can also be gauged by print defects such as mottle. This study investigates the effect of process parameters, viz., line screen, ink viscosity, printing speed, and impression roller hardness on print mottle, and explores a way to minimize the same. Design of experiments were generated and analyzed through analysis of variance, main and interaction effects. Furthermore, a regression model was generated to predict the print mottle. The predicted values from the model were in close agreement with the press results. The optimization of process parameters resulted in reduction of print mottle in solid printed areas by 34% and 51% on PET-G and PVC, respectively. Note de contenu : - EXPERIMENT : Materials - Surface energy of substrates - Experimental process - Methods of data gathering - Experimental design
- RESULTS AND DISCUSSION : Baseline for print mottle - Print mottleDOI : 10.1007/s11998-014-9628-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9628-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23219
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of fluorinated acrylate polymer and preparation and properties of antifouling coating / Yan Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Synthesis of fluorinated acrylate polymer and preparation and properties of antifouling coating Type de document : texte imprimé Auteurs : Yan Zhang, Auteur ; Yu-hong Qi, Auteur ; Zhan-ping Zhang, Auteur ; Guang-yu Sun, Auteur Année de publication : 2015 Article en page(s) : p. 215-223 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fluoropolymères
Polyacrylates
Polyacryliques
Polymères -- Propriétés mécaniques
Revêtements antisalissures
Surfaces (technologie)
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluorinated acrylate quadripolymer (QPFA), acrylate bipolymer (BPFA), and acrylate homopolymer (HPFA) were synthesized by free radical polymerization using different monomers. The three fluoropolymers (5%) were mixed respectively with acrylic varnish, and HPFA at different concentrations (1, 3, 5, 7, and 10 wt%) was mixed with acrylic varnish. The polymer films were characterized by differential scanning calorimetry, X-ray diffraction, water absorption rates, and contact angle analyses; the coatings were characterized by confocal laser scanning microscopy, mechanical analyses, water contact angles, water absorption rates, and biofouling analyses. Results indicate that the three coatings containing different fluoropolymers have comparable mechanical properties. The QPFA coating featured the lowest resistance to benthic diatom adhesion because of its low fluorine content. With increasing fluorine contents, the mechanical properties of the HPFA coatings decreased. However, the contact angles and resistance to adhesion increased. Though the HPFA particles lowered adhesion between the matrix and coating, they simultaneously generated rough surfaces. Note de contenu : - EXPERIMENTAL METHOD AND MATERIALS : Raw materials - Synthesis of fluorinated acrylate polymers - Synthesis of fluorinated acrylate quadripolymer (QFPA) - Synthesis of fluorinated acrylate bipolymer (BFPA) - Synthesis of fluorinated acrylate homopolymer (HPFA) - Preparation of coating - Characterization
- RESULTS AND DISCUSSION : Polymer film properties - Coating performanceDOI : 10.1007/s11998-014-9623-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9623-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23220
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 1 (01/2015) . - p. 215-223[article]Réservation
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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16952 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |