A durable and multifunctional antifog, antifrost, and self-cleaning/oil repellant UV curable coating based on poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate / Dhiraj S. Kaikade in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 955-967 Titre : A durable and multifunctional antifog, antifrost, and self-cleaning/oil repellant UV curable coating based on poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate Type de document : texte imprimé Auteurs : Dhiraj S. Kaikade, Auteur ; Anagha S. Sabnis, Auteur Année de publication : 2024 Article en page(s) : p. 955-967 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymères -- Synthèse Photoréticulation Revêtement auto-nettoyant Revêtements -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Revêtements anti-buée Revêtements antigel Revêtements organiques Sorbitol Index. décimale : 667.9 Revêtements et enduits Résumé : Sorbitol is a naturally occurring sugar alcohol and this work focuses on sorbitol-based UV curable polyurethane coatings for antifog, antifrost, and self-cleaning applications. The resins were synthesized by reacting isophorone diisocyanate (IPDI) with varying proportions of sorbitol and polyethylene glycol (PEG200). The resins synthesized were characterized by FTIR, 1H NMR, and analytical techniques such as hydroxyl, iodine, and acid values. Various formulations were prepared using the developed resin, reactive diluents, and photoinitiator. The coatings were applied on silane-treated glass substrates and then cured under UV light. The hydrophilicity of coatings was investigated by water contact angle measurement. The antifog, antifrost, and self-cleaning tests were carried out and it was observed that the coating shows antifog property for a contact angle below 33° but antifrost effect was shown by the coatings with a contact angle less than 7°. Owing to the excellent hydrophilicity, the black stains of oil were washed out with ease under a water flow, hence showing excellent oil repellent/self-cleaning property as well. Note de contenu : - MATERIALS AND METHODS : Material - Pretreatment of glass slides - Synthesis of prepolymer - Synthesis of poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate (SIP) - Preparation of coatings - Characterization - Mechanical and durability test - Antifog test - Antifrost test - RESULTS AND DISCUSSION : Preparation and properties of poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate (polySIP) coatings - Mechanical and stability tests - Antifog test - Antifrost test - Self-cleaning test DOI : https://doi.org/10.1007/s11998-023-00863-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00863-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41069 [article]

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Leachable pegylated cellulose acetate complex: a promising approach for controlled porosity osmotic pump tablets of Captopril / Muhammad Faheem Akhtar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 439-446 Titre : Leachable pegylated cellulose acetate complex: a promising approach for controlled porosity osmotic pump tablets of Captopril Type de document : texte imprimé Auteurs : Muhammad Faheem Akhtar, Auteur ; Muhammad Hanif, Auteur Année de publication : 2020 Article en page(s) : p. 439-446 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétate de cellulose L'acétate de cellulose est une matière plastique inventée en 1865. C'est l'ester acétate de la cellulose. Comprimés Formulation (Génie chimique) Osmolalité Polyéthylène glycol Sorbitol Index. décimale : 667.9 Revêtements et enduits Résumé : The aim of the present study was to develop pegylated cellulose acetate coating layer having leachable membrane created by controlled porosity osmotic pump (CPOP) technique. Already optimized core tablets of Captopril were used for the application of CPOP. In Box–Behnken design, cellulose acetate, polyethylene glycol, and sorbitol were used as variables and %Captopril release as a response for the coating process. Formulations were characterized by weight gain, thickness of leachable membrane, content uniformity, drug release, pH, dissolution medium osmolality effect, FTIR, and stability analysis for the optimization purpose. Optimized formulation was within the pharmacopoeial limits. Observed weight gain was 4.38–6.97%, and thickness of leachable membrane was 1.24–1.47 mm. Content uniformity was found to be 91.65–99.61%. Phosphate buffer of pH 6.8 showed 86.22–92.79% drug release and the first-order release pattern. pH-independent but osmolality-dependent drug release was observed. No incompatibility between the ingredients of prepared dosage form was observed in FTIR analysis. Accelerated stability study for 6 months showed no significant change in the prepared dosage form. Conclusively, prepared CPOP tablets can be used for the controlled release of Captopril in hypertensive patients to maintain the desired drug concentration within the body for required time period. Note de contenu : - MATERIALS AND METHODS : Materials - METHODS : Experimental design - Formulation of CPOP tablets - Physical evaluation of CPOP tablets - Content uniformity - Drug release kinetics - effect of dissolution medium osmolaty on %captopril release - Effect of pH on %captopril release - FTIR spectroscopic analysis - Stability study statistical analysis - RESULTS AND DISCUSSION : Physicochemical process of CPOP tablets - Content uniformity of CPOP tablets - Drug release kinetics for CPOP tablets - Effect of dissolution medium osmolality on %captopril relase - Effect of pH on %captopril release - FTIR spectroscopic analysis - Stability study DOI : https://doi.org/10.1007/s11998-019-00290-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00290-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33994 [article]

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Polyols pour polyuréthanes à base de saccharose et de sorbitol / Joëlle Fis in L'ACTUALITE CHIMIQUE, N° 11-12 (11-12/2002)  

[article]  inL'ACTUALITE CHIMIQUE > N° 11-12 (11-12/2002) . - p. 54-55 Titre : Polyols pour polyuréthanes à base de saccharose et de sorbitol Type de document : texte imprimé Auteurs : Joëlle Fis, Auteur Année de publication : 2002 Article en page(s) : p. 54-55 Langues : Français (fre) Catégories : Oxypropylation Polyols Polyuréthanes Ressources renouvelables Saccharose Sorbitol Index. décimale : 547.84 Composés macromoléculaires et composés connexes. Polymères Résumé : Certains sucres commerciaux sont utilisés comme précurseurs pour la synthèse de polyols nécessaires à la fabrication de mousses de polyuréthane l'isolation thermique. Cet article décrit les étapes essentielles liés à cette stratégie en termes de processus d'oxypropylation, de rapports structure/properties et d’exploitation des ressources renouvelables. En ligne : http://www.lactualitechimique.org/Polyols-pour-polyurethanes-a-base-de-saccharos [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4920 [article]

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Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route / Zhijun Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 721-732 Titre : Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route Type de document : texte imprimé Auteurs : Zhijun Wu, Auteur ; Jingtao Dai, Auteur ; Liuyan Tang, Auteur ; Jinqing Qu, Auteur Année de publication : 2019 Article en page(s) : p. 721-732 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides Caractérisation Carbonate cyclique Revêtements en phase aqueuse Revêtements sans isocyanates Rhéologie Sorbitol Index. décimale : 667.9 Revêtements et enduits Résumé : The cyclic carbonate derivatives carrying carboxyl groups were prepared via the reaction of the sorbitol-based cyclic carbonate (SC) with anhydrides including succinic anhydride, o-phthalic anhydride, and maleic anhydride. (Succinic anhydride-, o-phthalic anhydride-, and maleic anhydride-based cyclic carbonates were named SSC, PSC, and MSC, respectively.) The structures of SC, SSC, PSC, and MSC were characterized by 1H NMR and FTIR. Then, the novel sorbitol-based aqueous cyclic carbonate dispersion was prepared. It was found that SSC dispersion possessed excellent stability and its particle sizes ranged from 63 to 174 nm with −73.3 to −48.2 mV for the zeta potentials. A series of novel waterborne nonisocyanate polyurethanes coatings (WNIPU) were successfully prepared by sorbitol-based cyclic carbonate reacted with diamines. The effects of diamine categories and the molar ratios of isophorone diamine (IPDA) and hexamethylene diamine (HMDA) on the properties of WNIPU were studied. The results showed that the pencil and pendulum hardness of WNIPU coatings were all relatively decreased with the increase in HMDA contents. The WNIPU coatings exhibited excellent flexibility, adhesion, gloss, and impact resistance with the molar ratios of IPDA/HMDA ranging from 1:1 to 1:3. Moreover, cured films display good thermal stabilities with only 5% weight loss (T5%) in temperatures ranging from 246 to 272°C. Note de contenu : - EXPERIMENTAL : Materials - Preparation of sorbitol-based cyclic carbonate (SC) - Preparation of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)- based aqueous cyclic carbonate dispersions - Preparation of WNIPU coatings - Characterization of SC and WNIPU coatings - RESULTS AND DISCUSSION : Synthesis and characterization of SC - Preparation and characterization of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)-based aqueous cyclic carbonate dispersions - Synthesis and characterization of WNIPU coatings - Properties of WNIPU coatings DOI : 10.1007/s11998-018-00150-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0150-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32585 [article]

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Studies on the adsorption of non-ionic surfactants and the dripping behavior of their solutions by the drop volume and maximum bubble pressure technique / U. Teipel in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 37, N° 5/2000 (09-10/2000)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 37, N° 5/2000 (09-10/2000) . - p. 297-309 Titre : Studies on the adsorption of non-ionic surfactants and the dripping behavior of their solutions by the drop volume and maximum bubble pressure technique Type de document : texte imprimé Auteurs : U. Teipel, Auteur ; Pfzintal, Auteur ; N. Aksel, Auteur Année de publication : 2000 Article en page(s) : p. 297-309 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Alcanes Cinétique chimique Huile paraffinique Huiles et graisses Interfaces gaz-liquide Polyéthylène glycol Solutions aqueuses (chimie) Sorbitol Surfactants Tension superficielle Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : This study shows that the drop volume and maximum bubble pressure technique can be used to determine the adsorption behavior and interfacial adsorption kinetics of surfactants at fluid interfaces. Using these tensiometric methods, it is possible to determine not only the interfacial tension of the pure phases, but also the critical concentration for the formation of micelles (c.m.c.) in a surfactant system, the quasi-static interfacial tension as a function of surfactant concentration, and the maximum adsorption density at the interface. The determination of the dynamic interfacial tension makes it possible to indirectly characterize the kinetics of surfactant adsorption. The time dependence of the interfacial coverage resulting from this adsorption process is well described by two approximation solutions (for short and long adsorption times), with the result that the diffusion coefficients calculated as a function of surfactant concentration using these two methods show good agreement. The droplet formation and dripping behavior of a surfactant solution in a capillary was found to vary significantly according to whether the process occurred in a gaseous or fluid medium. In particular, the formation of satellite droplets was different for the two different media, in terms of both the volume and shape of the satellite droplets. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3234 [article]

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Synthesis of rubber seed oil waterborne alkyd resin from glucitol / Chigozie F. Uzoh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)  

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Tensioactifs basés sur des sucres / Sébastien Kerverdo in L'ACTUALITE CHIMIQUE, N° 323-324 (10-11/2008)  

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