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A novel approach for the evaluation of ice release performance of coatings using static friction measurements / M. Martinsen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
[article]
Titre : A novel approach for the evaluation of ice release performance of coatings using static friction measurements Type de document : texte imprimé Auteurs : M. Martinsen, Auteur ; K. O. Hed, Auteur ; J. S. Diget, Auteur ; H. L. Lein, Auteur Année de publication : 2021 Article en page(s) : p. 665-676 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cisaillement (mécanique)
Frottements (mécanique)
Plan d'expérience
Polyacryliques
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Polymères -- Synthèse
Polyols
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements anti-adhésion
Revêtements antigel
Revêtements organiquesTags : 'Adhérence de la glace' 'Frottement statique' 'Résistance au cisaillement sur Index. décimale : 667.9 Revêtements et enduits Résumé : Atmospheric icing on structures and equipment represents a challenge for operation and safety. Passive ice removal by ice-phobic coatings has received much attention over the last decades. The current state-of-the-art methods for quantifying the ice-release properties of such coatings suffer from a range of drawbacks, including poor reproducibility and high complexity test setups. Here, a facile rotational tribometer approach for measuring the static friction between polymeric coatings and ice is presented. The torque necessary to initiate motion at the coating-ice interphase was used as a measure of ice release. For a polydimethylsiloxane-based coating (Sylgard 184), the effects of ice-temperature, normal force, coating thickness, and dwell time (contact time between coating and ice at rest with fully applied normal force prior to applying torque) were established along with the conditions resulting in least data variation. With these conditions, tribology-based friction measurements were carried out on two additional coatings ; a two-component polyurethane, and a commercial foul release coating. The outcome of the method, i.e., grading of the coatings in terms of antiicing effect, matched those obtained with a widely used ice adhesion test method based on ice shear adhesion testing. The same trends are revealed by the two methods. However, the findings from the proposed tribology-based method result in consistently lower variation in outcomes and offer more detail on the ice adhesion and friction mechanisms. Note de contenu : - EXPERIMENTAL : Materials - Analytical methods - Synthesis of polyacrylic polyol - Coating preparations - Break-away torque and sliding friction measurements - Ice shear test - Experimental design
- RESULTS AND DISCUSSION : Determining the break-away torque - Influence of temperature, normal force, dwell time, and coating thickness on break-away torque - Reproducibility of break-away torque measurements for Sylgard 184 - Sliding friction - Correlation between break-away torque and shear stress
- Table 1 : Mechanical properties and static WCA of the test coatings at 23°C
- Table 2 :Defined factors and design space
- Table 3 : Results from the design of experiments with experimental parameters where break-away torque is given as an average of two measurements carried out on the Sylgard 184 coating systemDOI : https://doi.org/10.1007/s11998-020-00431-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00431-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35920
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Code-barres Cote Support Localisation Section Disponibilité 22785 - Périodique Bibliothèque principale Documentaires Disponible Novel CNSL-based waterborne Zn-rich primer systems for protective coatings / Hong Xu in COATINGS TECH, Vol. 15, N° 4 (04/2018)
[article]
Titre : Novel CNSL-based waterborne Zn-rich primer systems for protective coatings Type de document : texte imprimé Auteurs : Hong Xu, Auteur ; Fernanda Tavares, Auteur ; Anbu Natesh, Auteur ; Jing Li, Auteur Année de publication : 2018 Article en page(s) : p. 34-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Application directe sur le métal
Brillance (optique)
Cardanol
Epoxydes
Essais d'adhésion
Essais de brouillard salin
Formulation (Génie chimique)
Métaux -- Revêtements protecteurs
Noix de cajou et constituants
Phénalkamines
Polyuréthanes
Primaire (revêtement)
Réticulants
Revêtements -- Finition
Revêtements -- Propriétés mécaniques
Revêtements bi-composant
Revêtements en phase aqueuse
Rhéologie
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Low-VOC waterborne (WB) Zn-rich primers and high performance WB epoxy primers have been developed based on novel Cashew Nutshell Liquid (CNSL)-derived curing agents for industrial and protective coating applications. These unique WB phenalkamines were synthesized from a natural, non food chain and renewable biomaterial and could help formulate WB primer systems that meet stricter volatile organic compound (VOC) regulations as well as high performance requirerments.
This article presents the latest performance studies of new phenalkamine-based WB Zn-rich primers and epoxy primers, and discusses the challenges associated with such formulations.
New 2K WB Zn-rich primers were formulated with a water-free phenalkamine curing agent. The study results showed the WB Zn-rich primers had good compatibility with various commercially available solid epoxy dispersions and delivered good cure and mechanical properties ; importantly, those WB Zn-rich primers provided superb adhesion to both metal substrates and commercial polyurethane (PU) topcoats without the use of adhesion promoters. Excellent corrosion protection and good resistance to undercutting of the scribe were observed after 3000-h Q-Fog exposure.
Additionally, newly developed WB high performance primers based on zero-VOC WB phenalkamines were evaluated either in combination with WB Zn-rich primers or by being directly applied over metal substrates was found that those WB epoxy primers could enhance corrosion protection as mid-coats to WB Zn-rich primers ; when being used direct-to-metal, WB epoxy primers also exhibited good mechanical and adhesion properties that benefited the overall anticorrosion performances.Note de contenu : - Part I : Waterborne (WB) Zn-rich primer study
- Part II : Waterborne (WB) mid-coat systems based on new WB-C curing agent
- Part III : Wet-on-wet properties
- FIGURES : 1. Cashew apple and nutshell - 2. Average cardanol structure - 3. Example of phenalkamine structure - 4. Panel images of cross-hatch adhesion tests - 5. Panel images after 120h salt spray exposure - 6. Panel images after 4000-h salt spray exposure - 7. Panel images after 1200-h salt spray exposure - 8. Panel images after 2400-h salt spray exposure (surface rusts were removed via scratch pad) - 9. Panel images after 2300-h salt spray exposure (WB Zn-rich primer systems topcoated with a red iron oxide mid-coat) - 10. Panel images after scribe and wet adhesion testing - 11. Mixing viscosity changes as a function of the percentage of added water - 12. Linear dry time of various systems based on WB-C - 13. Panel images of resin 1+WB-C clear coating-system after 1200-h salt spray exposure - 14. Panel images of MC#1 and MC#2 systems after 271 and 767-h salt spray exposure - 15. Panel image of WB Zn-rich#4 primer system topcoated with MC#2 mid-coat primer after 1685-h salt spray exposure - 16. Photo images of the panels after wet-on-wet adhesion tests
- TABLES : 1. Waterborne curing agents : typical properties - 2. Typical properties of solid epoxy dispersion resins - 3. WB Zn-rich primer formulations by using WB-A curing agent - 4. Mechanical properties of WB Zn-Rich primers - 5. WB mid-coat formulations based on WB-C - 6. Adhesion and anticorrosion performances of MC#2 systems as a function of mixing times - 7. Mechanical and adhesion properties of MC#2 - 8. Gloss comparisonEn ligne : https://drive.google.com/file/d/1QsQ8l4uOx13cFvlKXZElv8uh5js2daAr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30518
in COATINGS TECH > Vol. 15, N° 4 (04/2018) . - p. 34-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19857 - Périodique Bibliothèque principale Documentaires Disponible Novel hyperbranched polyaspartic ester-soybean oil hybrid polyurethane-urea coating for high performance and anticorrosive application / Kumar Rajnish in PAINTINDIA, Vol. LXVII, N° 5 (05/2017)
[article]
Titre : Novel hyperbranched polyaspartic ester-soybean oil hybrid polyurethane-urea coating for high performance and anticorrosive application Type de document : texte imprimé Auteurs : Kumar Rajnish, Auteur ; Ramanuj Narayan, Auteur Année de publication : 2017 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique)
Copolymère uréthane-urée
Esters polyaspartiques
Huile de soja
Hydroxylation
Polymères ramifiés
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Hyperbranched polymers (HBP) are the best choice for high solid and excellent performance polyurethane (PU) coatings and structural materials. Polyaspartic ester polyol based PU-ureas, which are highly unexplored, give good gloss, improved (higher) reaction time, high film build up in a single coat, better leveling and adhesion to a number of substrates with wide application area. We have synthesized a hyperbranched polyaspartic-ester polyol (HPASP) with high atom economy and solvent-free condition via A, + B,B' polycondensation in 'one pot' but two steps. The polyol was reacted with H12MD1 to form one pack high solid moisture-cured PU-urea coatings. The coating exhibited excellent mechanical, thermal, gloss and anticorrosive properties. Keeping the broader application as well as industrial viability in mind, we modified the PU coating to improve flexibility and reduce cost without compromising with the properties. For this, hydroxylated soybean oil (SO) was added to HPASP in various ratios to make PU-ureas based on H12MDI. The PU-ureas based on polyaspartic ester polyol and their SO hybrids showed better reaction control than similar HBP-polyurethanes. The hybrid polyaspartic PU-urea coating films have shown good thermal stability with high gloss transition temperature (Tg). The gloss of all the hybrid coating films was high and the mechanical properties were excellent, some even better than HPASP based PU-urea films. The anticorrosion property of all the coatings was studied using electrochemical technique (Tafel plot) and Pound to be very good. Note de contenu : - EXPERIMENTAL : Characterization techniques - Synthesis of polyaspartic ester polyol and corresponding polyurethane-urea films -
- RESULTS AND DISCUSSION : Thermal properties - Thermo-mechanical properties - Abrasion and gloss properties - Anticorrosion properties
- SCHEMES : 1. Aspartic acid and polyaspartic-ester respectively - 2. HPASP synthesis - 3. Polyaspartic PU-urea formation
- FIGURES : 1a. TGA thermograms of various aspartic PU-urea films - 1b DTA thermograms of various aspartic PU-urea films - 2a and b. Storage modulus Vs temp and tan ? Vs temp respectively - 3. Electrochemical corrosion data (Tafel) of polyaspartic PU and SO hybrid coated mild steel
- TABLES : 1. TGA and DMTA results of polyaspartic PU-urea films - 2. Tensile, abrasion and gloss values of polyaspartic PU and SO hybrids - 3. Electrochemical corrosion data of polyaspartic PU and SO hybrid coated mild steelEn ligne : https://drive.google.com/file/d/1i3Z-Gl6Dc-GifR-071JAZD708I7aaWI4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28871
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Code-barres Cote Support Localisation Section Disponibilité 19144 - Périodique Bibliothèque principale Documentaires Disponible Novel inorganic/organic coatings based on linseed oil and sunflower oil with sol-gel precursors / Scott J. Tuman in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 854 (03/1996)
[article]
Titre : Novel inorganic/organic coatings based on linseed oil and sunflower oil with sol-gel precursors Type de document : texte imprimé Auteurs : Scott J. Tuman, Auteur ; Mark D. Soucek, Auteur Année de publication : 1996 Article en page(s) : p. 73-81 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alkoxyde
Anticorrosion
Formulation (Génie chimique)
Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative.
Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom.
L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément.
Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.
Huile de tournesol
Huiles et graisses végétales
Matériaux hybrides
Polymères
Primaire (revêtement)
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
SiccatifsUn siccatif est une substance qui joue un rôle de catalyseur en accélérant le séchage ou durcissement (polymérisation) d'un matériau tel une huile ou une peinture à base d'huile (pour le bâtiment ou les artistes).
Sol-gel, Procédé
Titane isopropanolateIndex. décimale : 667.9 Revêtements et enduits Résumé : New inorganic/organic hybrid coatings have been prepared utilizing linseed oil and sunflower oil as an organic phase and two sol-gel precursors [titanium (IV) i-propoxide, titanium (di-i-propoxide) bis(acetyl-acetonate)] as an inorganic phase. The ultimate goal is to develop a primer that will provide better adhesion and corrosion protection for metal substrates with minimal environmental impact. Coatings with a range of sol-gel precursor to drying oil ratios have been studied. Various coatings properties such as adhesion, hardness, impact resistance, and flexibility were observed as a function of sol-gel precursor content. In addition, the tensile properties and thermo-oxidative stabilities were also investigated. During processing, the sol-gel precursors appear to accelerate the drying of the coatings. Higher sol-gel precursor content increased both tensile strength and tensile modulus but decreased flexibility and strain-at-break. The thermo-oxidative stability was similar to drying oil coatings cured with driers. Note de contenu : - EXPERIMENTAL : Materials - Coating preparation - Coating evaluation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18471
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 854 (03/1996) . - p. 73-81[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003524 - Périodique Bibliothèque principale Documentaires Exclu du prêt Novel thermal and photo curable anti-reflective coatings using fluoroelastomer nanocomposites and self-assembly of nanoparticles / Konstantinos Kourtakis in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
[article]
Titre : Novel thermal and photo curable anti-reflective coatings using fluoroelastomer nanocomposites and self-assembly of nanoparticles Type de document : texte imprimé Auteurs : Konstantinos Kourtakis, Auteur ; Paul Bekiarian, Auteur ; Gregory Blackman, Auteur ; Mark Lewittes, Auteur ; Shekhar Subramoney, Auteur Année de publication : 2016 Article en page(s) : p. 753-762 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais dynamiques
Fluoroélastomères
Formulation (Génie chimique)
Matériaux -- Propriétés fonctionnelles
Nanoparticules
Photoréticulation
Réaction de couplage
Résistance à l'abrasion
Revêtement antireflet:Peinture antireflet
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Silanes
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.
Systèmes auto-assemblésIndex. décimale : 667.9 Revêtements et enduits Résumé : We describe novel optical coatings which require either thermal or photocuring to render them mechanically robust and abrasion resistant. These new coatings are low refractive index fluoroelastomer-nanoparticle composites that form a unique nanostructure during drying of the liquid coating. During drying, the nanoparticles in these liquid coatings migrate towards the substrate. The final, 100-nm-thick anti-reflective coatings are novel and exhibit a unique bilayer structure in which the nanoparticles are ordered and segregated towards the substrate. The coatings are rapidly cured using a new process and exhibit surprising “scratch durability” as measured by aggressively testing with steel wool. Sol gel chemistry is used which involves the reaction of the nanoparticles with an acrylic oxysilane to form nanoparticles which are functionalized with sol gel derived oligomers. The functionalized nanoparticles are combined with a fluoroelastomer containing a free radical initiator and multiolefinic crosslinker, and the composite film is rapidly cured by a thermal or UV process at low temperatures. The final product is a mechanically robust, low refractive index anti-reflective film which is useful for displays and photovoltaic devices. These are unique fluoropolymer nanocomposites which utilize nanoparticle self-assembly to enhance important properties. Note de contenu : - EXPERIMENTAL METHODS : Fluoroelastomer matrix polymer - Coating compositions : composites with fluoroelastomer and silica nanoparticles - Thermally cured formulations -Phothchemically cured formulations - Coating process by reverse microgravure - Optical measurements of cured films - Abrasion testing - Software analysis to determine abrasion resistance - Nanoscratch test for abrasion resistance - High-resolution microscopy
- RESULTS AND DISCUSSION : Nanoparticle and silane coupling agents - Fluoroelastomer nanocomposites : impact of silica nanoparticles and silane coupling agent - Formulation of bilayer structureDOI : 10.1007/s11998-016-9785-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9785-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27112
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Code-barres Cote Support Localisation Section Disponibilité 18316 - Périodique Bibliothèque principale Documentaires Disponible Novel waterborne hyperbranched polyurethane-urea-silica hydrid crosslinked coatings films / Kishore K. Jena in PAINTINDIA, Vol. LXI, N° 12 (12/2011)
PermalinkOptimisation of stain resistance through Neuburg siliceous earth / Bodo Essen in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4632 (06/2017)
PermalinkOrganosilicon leather coating technology based on carbon peak strategy / Wenkai Wang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkPeintures et vernis. Essai de pliage sur mandrin cylindrique - Norme ISO 1519 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2011)
PermalinkPeintures et vernis. Produits de peinture et systèmes de revêtements pour maçonnerie et béton extérieurs. Partie 7 : Détermination de la résistance à la fissuration - Norme NF EN 1062-7 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2004)
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PermalinkPolydopamine-AgNPs coated acrylic fabric for antimicrobial and antioxidant textiles / Esam S. Allehyani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
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