Hydrophobic, transparent waterborne UV-curable polyurethane nanocomposites based on polycarbonate and PCL-PDMS-PCL reinforced with colloidal silica / Shengven Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 1021-1033 Titre : Hydrophobic, transparent waterborne UV-curable polyurethane nanocomposites based on polycarbonate and PCL-PDMS-PCL reinforced with colloidal silica Type de document : texte imprimé Auteurs : Shengven Zhang, Auteur ; Zidong Chen, Auteur ; Zimo Xu, Auteur ; Shi Gang, Auteur ; Huiyu Bai, Auteur ; Xiaoya Liu, Auteur Année de publication : 2016 Article en page(s) : p. 1021-1033 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Gel de silice Hydrophobie Matériaux hybrides Poly-e-caprolactone Polycarbonates Polydiméthylsiloxane Le 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 en émulsion Polyuréthanes Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Transparence (optique) Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne ultraviolet-curable polyurethane (WUPU) and its nanocomposites based on polycarbonate and α,ω-dihydroxy-[poly(ε-caprolactone)-poly(dimethylsiloxane)-poly(ε-caprolactone)] (PCL-PDMS-PCL) were synthesized using isophorone diisocyanate (IPDI), dimethyl propionic acid (DMPA), polycarbonate diol (PCD), PCL-PDMS-PCL, hydroxyethyl methacrylate (HEMA), and aqueous colloidal silica. The resulting WUPU materials were characterized by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies, dynamic light scattering (DLS), and rheometry. The effects of PCL-PDMS-PCL and silica on the colloidal, physicochemical, and surface properties of the WUPU and its nanocomposites were studied. It was found that incorporation of PCL-PDMS-PCL (10 wt%) significantly enhanced the Young’s modulus, tensile strength, surface hydrophobicity, and water resistance of the WUPU films due to microphase separation and better interfacial adhesion between the PDMS soft phase and urethane hard phase provided by the PCL blocks. Furthermore, incorporation of silica (10 wt%) further improved the modulus, tensile strength, and water resistance of the PCD-PCL-PDMS-PCL-WUPU films without degrading the high surface hydrophobicity or transparency, due to the homogeneous dispersion and network structure of the silica clusters in the WUPU matrix. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of UV-curable PCD-PCL-PDMS-PCL-WUPU nanocomposite dispersions - Methods - RESULTS AND DISCUSSION : Synthesis and characterisation of CD-PCL-PDMS-PCL-WUPU dispersions - Morphology of nanocomposites films - Water contact angle and water resistance of nanocomposite films - Mechanical properties of nanocomposite films - UV-Vis transmission spectra DOI : 10.1007/s11998-016-9812-6 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9806-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27255 [article]

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Novel partially bio-based fluorinated polyimides from dimer fatty diamine for UV-cured coating / Jingcheng Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1325-1334 Titre : Novel partially bio-based fluorinated polyimides from dimer fatty diamine for UV-cured coating Type de document : texte imprimé Auteurs : Jingcheng Liu, Auteur ; Kuan Wang, Auteur ; Yazhen Xie, Auteur ; Fei Gao, Auteur ; Qingtao Zeng, Auteur ; Yan Yuan, Auteur ; Ren Liu, Auteur ; Xiaoya Liu, Auteur Année de publication : 2017 Article en page(s) : p. 1325-1334 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Fluoropolymères Polyimides Polymères -- Analyse Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : A series of novel partially bio-based fluorinated polyimides with double-bond end groups (BGPIs) from 4,4′-(hexafluoroisopropylidene) diphthalic anhydride, 4,4′-(hexafluoroisopropylidene) dianiline, Priamine 1074, 4-aminobenzoic acid, and glycidyl methacrylate were synthesized via a copolycondensation method in m-cresol. The chemical structure and performances of BGPIs were fully characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, gel permeation chromatography, solubility test, X-ray diffraction, and differential scanning calorimetry. It was determined that the prepared BGPIs were in the amorphous phase and readily soluble in conventional aprotic polar solvents. Additionally, the properties of as-prepared UV-cured coatings based on BGPIs were also evaluated by real-time Fourier transform infrared, thermogravimetric analysis, UV–Vis spectroscopy, and so on. Results revealed that all coatings exhibited satisfactory curing, higher adhesion, lower water uptakes, outstanding optical transparency, and fairly favorable thermal stability under a high content of biomass up to 48.9%. Therefore, these bio-based polymers could be considered as a potential sustainable candidate for high-temperature UV-curable coatings in the microelectronic field. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of BGPIs with double-bond end groups - Preparation of UV-cured coatings based on BGPIs - The characterizations of BGPIs - The characterizations of UV-cured coatings based on BGPIs - RESULTS AND DISCUSSION : Structural characterization of BGPIs - Basic performances of BGPIs - Solubility of BGPIs - XRD analysis of BGPIs - DSC analysis of BGPIs - UV-curing behaviors of the coatings based on BGPIs - Transmittance of UV-cured coatings based on BGPIs - TGA analysis of UV-cured coatings based on BGPIs - Other performances of UV-cured coatings based on BGPIs DOI : 10.1007/s11998-017-9931-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9931-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29637 [article]

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Synthesis of fluorinated polycarbonate-based polyurethane acrylate for UV-curable coatings / Jingcheng Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 233–241 Titre : Synthesis of fluorinated polycarbonate-based polyurethane acrylate for UV-curable coatings Type de document : texte imprimé Auteurs : Jingcheng Liu, Auteur ; Baoqing Wang, Auteur ; Yan Yuan, Auteur ; Ren Liu, Auteur ; Zhiquan Li, Auteur ; Xiaoya Liu, Auteur Année de publication : 2017 Article en page(s) : p. 233–241 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane acrylate Fluoropolymères Hydrophobie Polycarbonates Polymères -- Synthèse Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : Fluorinated polycarbonate-based UV-curable polyurethane acrylate (F-PCUA) was synthesized by incorporating 1H, 1H, 2H, 2H-Perfluoro-1-octanol to the end of polycarbonate-based PUA chains. The structure of F-PCUA was determined by 1H-NMR, 19F-NMR, and FTIR analyses. The physical, surface, and thermal properties of F-PCUA were also examined. The F-PCUA was used as a hydrophobic additive in PUA coatings, and the water and oil wettability of the UV-cured film was investigated by contact angle measurements. The results showed that the coating system had great hydrophobicity. Furthermore, X-ray photoelectron spectroscopy research confirmed that a hydrophobic fluorine-enriched surface was obtained in the coating system. Moreover, the mechanical and chemical properties of the hydrophobic coatings did not show deterioration with the introduction of elemental F. Note de contenu : - EXPERIMENTAL : Synthesis of fluorinated PCDL-based PUA (F-CPUA) - Preparation of F-CPUA films - Preparation of hydrophobic PUA Coatings - RESULTS AND DISCUSSION : FTIR - 1H-NMR and 19F-NMR - Tensile strenght - Thermogravimetric analysis (TGA) - Contact angle - Surface-free energy - X-ray photoelectron analysis (XPS) - Coating performance DOI : 10.1007/s11998-016-9847-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9847-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27805 [article]

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