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Antigraffiti polyurethane coating containing fluorocarbon side chains grafted polymethylsiloxane / Hu Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
[article]
Titre : Antigraffiti polyurethane coating containing fluorocarbon side chains grafted polymethylsiloxane Type de document : texte imprimé Auteurs : Hu Liu, Auteur ; Baosong Fu, Auteur ; Yi Li, Auteur ; Qianqian Shang, Auteur ; Guomin Xiao, Auteur Année de publication : 2013 Article en page(s) : p. 361-369 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères greffés
Fluoropolymères
HydrosilylationLa réaction d'hydrosilylation consiste en l'addition d'une fonction hydrogénosilane (Si-H) sur un composé organique insaturé.
Il existe principalement deux méthodes pour mettre en œuvre cette réaction :
La génération de radicaux silyle : thermiquement (300 °C), par irradiation (rayonnement ultraviolet ou par décomposition de peroxydes ou d'azonitriles.
La catalyse par des métaux de transition généralement du groupe VIII. Parmi ces différents catalyseurs employés pour la réaction d'hydrosilylation, les composés à base de platine et plus particulièrement l'acide hexachloroplatinique hexahydraté sont ceux qui présentent la plus grande efficacité1. Ce catalyseur utilisé en très faible quantité et pour des temps de réaction généralement inférieurs à 5 h permet d'atteindre des rendements relativement élevés.
Un mécanisme plus récent de l'hydrosilylation a été proposé dans la thèse de Patrick Cancouët sur un polysiloxane porteur de fonction hydrogénosilanes latérales.
Polyméthylsiloxane
Polyuréthanes
Revêtements anti-graffitisIndex. décimale : 667.9 Revêtements et enduits Résumé : The novel polymethylsiloxane grafted by fluorocarbon side chains was synthesized via hydrosilylation reaction of polymethylhydrosiloxane (PMHS) with 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) in the presence of Karstedt’s catalyst. The reaction factors of reaction temperature, reaction time, catalyst dosage, solvent dosage, and molar ratio of the reactants were investigated through orthogonal experiments. Under optimal conditions, the grafting ratio of HFBA to PMHS reached 91.6%. The structure of the grafted polymer was characterized by FTIR and 1H NMR spectra. The synthesized polymer was incorporated into two-component polyurethane coating formulations as an additive to prepare antigraffiti coatings. After curing, the contact angle measurement was performed and the results showed that surface free energy of the coating film decreased dramatically from 30.7 to 21.4 mJ/m2. The inks of permanent markers cannot spread readily on the coating film and can be removed easily, indicating that the incorporation of the synthesized polymer endowed the coating with admirable antigraffiti performance. XPS analysis revealed that atomic concentrations of silicon and fluorine near the surface (about 10 nm) were much higher than deeper within the film (about 100 nm), suggesting that these two elements had a strong migration tendency toward the coating–air interface. AFM measurement showed that the inclusion of synthesized polymer in coating did not affect the surface roughness of the film. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PHMS-graft-HFBA (PSF) - Preparation of antigraffiti polyurethane paints (AGPU) - Characterization
- RESULTS AND DISCUSSION : Orthogonal experiment design for the synthesis of PSF - Structure characterization - Surface properties of coatingsDOI : 10.1007/s11998-012-9452-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9452-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18735
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Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible Bio-based reactive diluent derived from cardanol and its application in polyurethane acrylate (PUA) coatings with high performance / Yun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
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Titre : Bio-based reactive diluent derived from cardanol and its application in polyurethane acrylate (PUA) coatings with high performance Type de document : texte imprimé Auteurs : Yun Hu, Auteur ; Guodong Feng, Auteur ; Qianqian Shang, Auteur ; Caiying Bo, Auteur ; Puyou Jia, Auteur ; Chengguo Liu, Auteur ; Feng Xu, Auteur ; Yonghong Zhou, Auteur Année de publication : 2019 Article en page(s) : p. 499-509 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Caractérisation
Cardanol
Chimie -- Essais et réactifs
Copolymère uréthane acrylate
Diluants
Huile de ricin et constituants
Polymères hautes performances
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : A UV-curable cardanol-based monomer (ECGE) was prepared using cardanol and epichlorohydrin, followed by epoxidation of the unsaturation in alkyl side chains of cardanol segments. After its chemical structure was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance (1H NMR), ECGE was used as a reactive diluent to copolymerize with castor oil-based polyurethane acrylate (PUA) and a series of UV-curable coatings were prepared. Results showed that the viscosity and volume shrinkage of the UV-curable PUA system decreased significantly after the introduction of cardanol-based monomer while maintaining reasonably high bio-renewable contents; when containing 50% of ECGE, the biomass content reaches 66.2%, which is 1.41 times that of pure resin. In addition, the coating properties were evaluated to determine hardness, adhesion, flexibility, and water resistance. The properties of UV-curable thermoset were also studied using tensile testing, dynamic mechanical thermal analysis, and thermogravimetric analysis. The cardanol-based coatings showed excellent adhesion, flexibility, medium hardness, and enhanced char yield although tensile strength, tensile modulus and glass transition temperatures were somewhat diminished. All these performances can be attributed to the unique architectures of ECGE that combined the structural features of rigid benzene ring and long flexible alkyl chains. The UV-curing behavior was determined using real-time IR, and the results indicated that the conversion of unsaturated bond was increased with more concentration of ECGE. Note de contenu : - MATERIALS - Characterization - Synthesis of epoxidized cardanol glycidyl ether (ECGE) - Preparation of the UV-curable coatings
- RESULTS AND DISCUSSION : Structure characterization of ECG - Bio-based content of the UV-curable coatings - Viscosity - UV-curing behaviors of the UV-curable bio-based coatings - Volumetric shrinkage of the UV-curable coatings - Gel contents of the UV-curable coatings - Tensile properties - DMA of the UV-curable bio-based coatings - Thermal properties of the UV-curable bio-based coatings - Coatings properties of the UV-curable bio-based coatings - Proposed dual-curing mechanismDOI : 10.1007/s11998-018-0128-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0128-6 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32420
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Code-barres Cote Support Localisation Section Disponibilité 20894 - Périodique Bibliothèque principale Documentaires Disponible Facile creation of superhydrophobic surface with fluorine–silicon polymer under ambient atmosphere / Qianqian Shang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)
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Titre : Facile creation of superhydrophobic surface with fluorine–silicon polymer under ambient atmosphere Type de document : texte imprimé Auteurs : Qianqian Shang, Auteur ; Baosong Fu, Auteur ; Hu Liu, Auteur ; Mengyu Wang, Auteur ; Guomin Xiao, Auteur Année de publication : 2012 Article en page(s) : p. 589-595 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Copolymères
Fluorine
Fluoropolymères
Hydrophobie
Revêtements:Peinture
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).Index. décimale : 667.9 Revêtements et enduits Résumé : A fluorine–silicon polymer of poly(styrene-co-1H,1H,2H,2H-perfluorooctyl methacrylate-co-vinyltriethoxysilane) (PSFV) was synthesized by bulk polymerization, and superhydrophobic surfaces were subsequently fabricated utilizing phase separation technique in one step by casting PSFV copolymer solution under ambient atmosphere. The PSFV copolymer was dissolved in tetrahydrofuran (THF), and then ethanol was added into the solution to induce phase separation. The surface morphologies of the copolymer films were controlled by the degree of phase separation, which could be tuned easily by the ethanol/THF volume ratio and the solution’s initial concentration. Scanning electron microscopy observations indicated that the superhydrophobic copolymer film had a rough surface with a binary hierarchical structure. A brief explanation of the formation of the special microstructure was put forward. The water contact angle and sliding angle of the superhydrophobic PSFV surface were measured as 162° and 4°, respectively. The simplicity of the operation’s process might make the superhydrophobic surface potentially useful in a variety of applications. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of copolymer - Preparation of superhydrophobic copolymer film - Characterization
- RESULTS AND DISCUSSION : Characterization of the PSFV copolymer - Preparation of superhydrophobic copolymer filmsDOI : 10.1007/s11998-012-9394-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9394-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16030
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Code-barres Cote Support Localisation Section Disponibilité 14190 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of water repellent coatings from vinyl functionalized SiO2 spheres / Qianqian Shang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
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Titre : Facile fabrication of water repellent coatings from vinyl functionalized SiO2 spheres Type de document : texte imprimé Auteurs : Qianqian Shang, Auteur ; Mengyu Wang, Auteur ; Hu Liu, Auteur ; Lijing Gao, Auteur ; Guomin Xiao, Auteur Année de publication : 2013 Article en page(s) : p. 465-473 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique
Angle de contact
Dioxyde de silicium
Hydrophobie
Imperméabilisation
Microsphères
Revêtements:Peinture
Sol-gel, Procédé
Surfaces fonctionnellesIndex. décimale : 667.9 Revêtements et enduits Résumé : Water repellent SiO2 particulate coatings were prepared by a one-step introduction of vinyl groups on the coating surface. Rough surface structure and low surface energy could be directly obtained. Vinyl functionalized SiO2 (vinyl-SiO2) spheres with average diameter of 500 nm were first synthesized by a sol–gel method in aqueous solution using vinyltriethoxysilane as the precursor. The multilayer SiO2 coating fabricated by dip-coating method was highly hydrophobic with a water contact angle of 145.7° ± 2.3°. The superhydrophobic SiO2 coating with a water contact angle up to 158° ± 1.7° was prepared by spraying an alcohol mixture suspension of the vinyl-SiO2 spheres on the glass substrate. In addition, the superhydrophobic SiO2 coating demonstrated good stability under the acidic condition. However, it lost its hydrophobicity above 200°C because of the oxidation and degradation of vinyl groups. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of monodisperse vinyl-SiO2 spheres - Preparation of SiO2 coatings - Characterization
- RESULTS AND DISCUSSION : Morphology and structural characterization of vinyl-SiO2 spheres - Hydrophobic properties of the multilayers SiO2 coatings - Superhydrophobic properties of the SiO2 coating - Wetting stability of the superhydrophobic SiO2 coating - Thermal stability of the superhydrophobic SiO2DOI : 10.1007/s11998-012-9465-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9465-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19096
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Code-barres Cote Support Localisation Section Disponibilité 15460 - Périodique Bibliothèque principale Documentaires Disponible 15594 - Périodique Bibliothèque principale Documentaires Disponible One-pot fabrication of robust hydrophobia and superoleophilic cotton fabrics for effective oil-water separation / Qianqian Shang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
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Titre : One-pot fabrication of robust hydrophobia and superoleophilic cotton fabrics for effective oil-water separation Type de document : texte imprimé Auteurs : Qianqian Shang, Auteur ; Chengguo Liu, Auteur ; Yonghong Zhou Année de publication : 2018 Article en page(s) : p. 65–75 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Eau
Huiles et graisses
Hydrophobie
Nanoparticules
Oléophobie
Séparation (technologie)
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.
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : A one-pot sonochemical irradiation method was developed for the fabrication of superhydrophobic and superoleophilic cotton fabric from a solution consisting of branched silica nanoparticles and tetraethoxysilane-dodecyltrimethoxysilane sol. The silica/sol-coated cotton fabric could be wetted by liquids of low surface tension, but was water repellent with a water contact angle of 159 ± 1.2° and water shedding angle of 6 ± 0.8°. The as-prepared cotton fabric could be used as effective materials for the separation of oil from water with separation efficiency as high as 98.2% and maintained separation efficiency above 94% after 30 separation cycles for the kerosene-water mixture. Moreover, the superhydrophobic and superoleophilic cotton fabric could maintain stable superhydrophobicity after treatment with strong acidic and alkali solutions, and harsh mechanical damage. Therefore, this reported robust superhydrophobic cotton fabric exhibits encouraging practical application for oil-water separation. Note de contenu : - EXPERIMENTAL : Materials - Fabrication of superhydrophobic cotton fabric - Stability tests of the superhydrophobic fabrics - Characterizations
- RESULTS AND DISCUSSION : Fabrication of superhydrophobic cotton fabrics - Surface morphology and structure of superhydrophobic cotton fabrics - Wettability of superhydrophobic cotton fabrics - Oil-water separation of the superhydrophobic cotton fabric - Durability tests of the superhydrophobic cotton fabricDOI : 10.1007/s11998-017-9947-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9947-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30068
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Code-barres Cote Support Localisation Section Disponibilité 19610 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of polyurethane clearcoats and investigation into their antigraffiti property / Hu Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
PermalinkA simple method for the fabrication of silica-based superhydrophobic surfaces / Qianqian Shang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 4 (07/2014)
PermalinkSynthesis and characterization of novel renewable castor oil-based UV-curable polyfunctional polyurethane acrylate / Yun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
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