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The fast deposition of antireflection coating / Shing-Dar Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : The fast deposition of antireflection coating Type de document : texte imprimé Auteurs : Shing-Dar Wang, Auteur ; Meng-Chi Li, Auteur ; Yen-Cheng Peng, Auteur ; Cheng-Chung Lee, Auteur Année de publication : 2017 Article en page(s) : p. 1169-1182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anti-réflectance
Champs électriques
Polyélectrolytes
Revêtements
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, the effect of deposition time (5, 60, or 300 s) on a double-sided antireflection (AR) coating done by layer-by-layer deposition of polyelectrolyte was determined. The different structures and transmittance of an AR coating induced by electric-field-assisted layer-by-layer deposition (ELBLD) (with voltage of 0.5, 5, 50, or 500 V) and normal deposition (with voltage of 0 V) were compared. The electric field was perpendicular to the glass surface. After 5.5 bilayers of PAH/PAA were fabricated, the film was exposed to an acidic treatment of HCl solution (pH 2.4) for 65 s, followed by a brief rinse (~15 s) in deionized water, blown dry with air, and heat treated at 220°C for 2 h. Regardless of whether the electric field was applied, the average transmittance of visible light of the AR coating was more than 96% except for the reduced transmittance because of the excessive deposition of polyelectrolyte at an applied voltage of 500 V and a deposition time of 300 s. Average transmittance of 97.68 ± 0.31% was obtained at normal deposition of 5.5 bilayers with deposition time of 60 s. The polyelectrolytes had a propensity to form larger particles or accumulate into bundles under ELBLD, which was detrimental to the transmittance of an AR coating. Therefore, at the same deposition time, transmittance values of ELBLD samples were slightly lower than those of normal deposition. In other words, in the overall performance, the AR films of normal deposition are superior to those of ELBLD. The blowing pressure applied to dry the coating had significant impact on the quality of the film. Note de contenu : - Transmittance values of visible light
- AFM analysis
- SEM analysis
- Thickness and refractive index of the AR coating
- The effect of blowing pressure on transmittance of AR coating
- Comparison between normal deposition and ELBLDDOI : 10.1007/s11998-016-9909-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9909-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29151
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible The greener route to emulsion polymerisation : eliminating VOCs and formaldehyde / M. Lubik in SURFACE COATINGS INTERNATIONAL, Vol. 95, 5 (10/2012)
[article]
Titre : The greener route to emulsion polymerisation : eliminating VOCs and formaldehyde Type de document : texte imprimé Auteurs : M. Lubik, Auteur Année de publication : 2012 Article en page(s) : p. 228-230 Langues : Anglais (eng) Catégories : Acétate de vinyle L'acétate de vinyle est l'ester de l'acide acétique (acide éthanoïque) avec le tautomère alcoolique de l'éthanal (acétaldéhyde) et de formule semi-développée, CH3COO–CH=CH2.
L'acétate de vinyle est préparé, en règle générale, en phase vapeur, en faisant réagir un grand excès d'acétylène sur de l'acide acétique (200 °C) en présence de catalyseurs au zinc et au cadmium). On obtient un liquide incolore à odeur très pénétrante qui ne se polymérise en polyacétate de vinyle (PVAC) qu'en présence de catalyseurs et donne des solides durs très stables à la chaleur. Il peut être copolymérisé avec d'autres composés vinyliques ou d'autres monomères.
Acide sulfinique -- Dérivés
Formaldéhyde -- Suppression ou remplacement
Oxydoréduction
Polymérisation en émulsion
Revêtements
Solvants -- Suppression ou remplacementIndex. décimale : 667.9 Revêtements et enduits Résumé : New regulations, market needs and customer requirements demand new emulsion formulations with a low VOC content. Many of these new formulations use hydrophobic monomers that present significant challenges in terms of productivity and monomer conversion. Note de contenu : - Speeding up reactions
- Recommended process conditions
- Redox measurement enhances productivity
- Summarising the benefitsEn ligne : https://drive.google.com/file/d/1xzA3EbePTjOJJm1eqOBQMchBZPe5NyVY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16009
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Code-barres Cote Support Localisation Section Disponibilité 14191 - Périodique Bibliothèque principale Documentaires Disponible The influence of different shapes and size distributions of coating pigments on packing and dewatering / Jae Y. Shin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
[article]
Titre : The influence of different shapes and size distributions of coating pigments on packing and dewatering Type de document : texte imprimé Auteurs : Jae Y. Shin, Auteur ; Hak Lae Lee, Auteur Année de publication : 2020 Article en page(s) : p. 1425–1436 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Déshydratation
Dispersions et suspensions
Emballages
Formes des particules
Granulométrie
Papier et carton couché
Pigments
Revêtements
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Particle shape and particle-size distribution (PSD) are important factors for pigment packing and water retention in the pigment coating process, being closely associated with many runnability problems. Diverse experimental investigations on the packing and dewatering of pigment slurries have been made. However, theoretical approaches remain lacking. This paper presents a joint experimental and theoretical analysis of the influence of pigment shape and PSD on pigment packing and dewatering. The relative viscosities of very dilute pigment slurries were measured and used to determine the intrinsic viscosity, based on the Einstein equation. The deviation of pigment shape from spherical caused an increase in viscosity of the slurries. Acicular precipitated calcium carbonates gave lower shape factor values than platy clay particles, which indicated that the needle-like particles could rotate more easily around their long axes under shearing conditions. The packing of pigments, which determines porosity, permeability, light scattering, and mechanical properties, was examined. The packing volumes of nonspherical pigments were estimated based on their respective PSDs, using an algorithm developed for spherical particles, modified with a correction factor. This model is based on the close random-packing volume fraction (∅2p) of particles of uniform size being an independent variable, regardless of their shape. Therefore, it was valid as long as the particles always achieve the same close random-packing volume (∅1p) by sedimentation or tapping. Overall, the effect of the particle shape and PSD on the dewatering and filter-cake permeability (Kf) was analyzed. The dewatering rates were measured with a common pressure filtration method, and the permeability of the filter cakes was obtained by fitting the data to a filtration equation. The particle size and PSD were found to influence the permeability constant, but there was little correlation between the permeability and particle shape. Note de contenu : - MATERIALS AND METHODS : Particle size distribution of pigments and SEM images - Characterization of pigments by viscosity measurement - Sedimentation volume of dispersion - Dewatering rate
- THEORY AND CALCULATION : Model development - New approach
- RESULTS AND DISCUSSION : Particle-size distribution of pigments - Effect of electrolyte on viscosity - Aspect ratio of pigment particles - Sedimentation volume of dispersion by centrifugation - Packing volume fractions of nonspherical particles - Dewatering and permeability of filter cakeDOI : https://doi.org/10.1007/s11998-020-00371-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00371-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34949
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Code-barres Cote Support Localisation Section Disponibilité 22458 - Périodique Bibliothèque principale Documentaires Disponible The influence of structural modification and composition of glycidyl carbamate resins on their viscosity and coating performance / Umesh D. Harkal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
[article]
Titre : The influence of structural modification and composition of glycidyl carbamate resins on their viscosity and coating performance Type de document : texte imprimé Auteurs : Umesh D. Harkal, Auteur ; Aaron J. Muehlberg, Auteur ; Jung Li, Auteur ; James T. Garrett, Auteur ; Dean C. Webster, Auteur Année de publication : 2010 Article en page(s) : p. 531-546 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Revêtements:Peinture Tags : 'Résine de carbamate glycidyl' Uréthane Epoxy Revêtement 'Rapports structure-propriété' Index. décimale : 667.9 Revêtements et enduits Résumé : The synthesis, characterization, and coatings performance of a series of glycidyl carbamate (GC) resins synthesized from a hexamethylene diisocyanate biuret resin, glycidol, and alcohols were explored. The partial replacement of glycidol with alcohols was explored as a way to reduce the viscosity of multifunctional GC resins. Six modified GC resins were obtained by replacing one-third of the glycidol with alcohols and ether alcohols. The modified GC resins were characterized using FTIR and 13C NMR. The alcohol-modified GC resins had significantly lower viscosity than that of the control GC resin. The effect of amount of alcohol modifier on resin viscosity was also studied by making a series of resins with different levels of modifier. Both amine-cured and self-crosslinked coatings were prepared from the resins. Coating properties such as hardness, impact strength, methyl ethyl ketone double rubs, flexibility, and adhesion were studied. Differential scanning calorimetry and thermogravimetric analysis were also used to study the thermal properties of the coatings. The resin structures and their coating performance showed an excellent correlation. The coating performance was found to be governed by the type of modifier, structural compositions of the modifier in the resins, type of amine crosslinkers, and techniques of crosslinking used. DOI : 10.1007/s11998-010-9262-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9262-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9909
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Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible The key role of release liners in the manufacture of high performance prepreg composites / David Martinez in JEC COMPOSITES MAGAZINE, N° 80 (04/2013)
[article]
Titre : The key role of release liners in the manufacture of high performance prepreg composites Type de document : texte imprimé Auteurs : David Martinez, Auteur ; Florian Chapalain, Auteur Année de publication : 2013 Article en page(s) : p. 59-61 Langues : Anglais (eng) Catégories : Aéronautique
Anti-adhérence (matériaux)
Charnières
Composites à fibres
Epoxydes
Matériaux -- Imprégnation
Revêtements
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
ThermodurcissablesIndex. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : As one of the leading European manufacturers of release liners, Gascogne Laminates is positioning itself as the preferred partner of the composite industry, where it has developed strong partnerships all along the value chain. To support its development, the company has established a dedicated team of experts and invested more than 10 million E in the acquisition of state-of-the-art silicone coating machine in 2012, providing the ultimate release consistency and reliability on the market. Gascogne Laminates has also developed a comprehensive rango of "intelligent" release liners specifically designed for the manufacturing of prepregs, providing dedicated solutions for end-use markets. Note de contenu : - Use of release liners in prepreg manufacturing
- The essential role of release liners
- Future trends in release liners
- "Intelligent" release liners for specific end-use markets
- Tailor-made solutions
- New state-of-the-art equipment
- Prepreg excellence daysPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18987
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