Antimicrobial activity of polysiloxane coatings containing quaternary ammonium-functionalized polyhedral oligomeric silsesquioxane / Partha Majumdar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 4 (07/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 4 (07/2010) . - p. 455-467 Titre : Antimicrobial activity of polysiloxane coatings containing quaternary ammonium-functionalized polyhedral oligomeric silsesquioxane Type de document : texte imprimé Auteurs : Partha Majumdar, Auteur ; Jie He, Auteur ; Elizabeth Lee, Auteur ; Alekhya Kallam, Auteur ; Nathan Gubbins, Auteur ; Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2010 Article en page(s) : p. 455-467 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens 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. Revêtements Silicones Les 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). Silsesquioxanes oligomères polyhèdres Index. décimale : 667.9 Revêtements et enduits Résumé : An array of quaternary ammonium functionalized-polyhedral oligomeric silsesquioxane (Q-POSS) compounds with different alkyl chain lengths and counter ions were synthesized using a two-step process. First, octasilane POSS was functionalized with dimethylamino groups by hydrosilylation with allyldimethylamine. Next, partial quaternization of the tertiaryamino-functional POSS was achieved using an alkyl halide to produce the Q-POSS. Alkyl chain length of the Q-POSS compounds varied from –C12H25 to –C18H37 and the counter ions varied between chlorine, bromine, and iodine. Moisture-cured polysiloxane coatings were prepared by dispersing Q-POSS molecules into a solution blend of silanol-terminated polydimethylsiloxane, methylacetoxysilane, and a catalyst. To evaluate the utility of the Q-POSS molecules as a broad-spectrum antimicrobial additive, the antimicrobial activity of the coatings toward the Gram-negative bacterium, Escherichia coli, the Gram-positive bacterium, Staphylococcus aureus, and the opportunistic fungal pathogen, Candida albicans, was determined using an agar plating method. The results obtained showed that both the composition of the Q-POSS and the composition of the polysiloxane matrix affected antimicrobial properties. Compositions were identified that inhibited the growth of all three microorganisms on the coating surface. Surface Raman spectroscopic analysis was performed on selected set of coatings to understand the relative concentration of Q-POSS molecules at the coating surface. DOI : 10.1007/s11998-009-9197-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9197-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9768 [article]

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Effect of different structured POSS/GMA-containing copolymers on the morphology of porous coating by breath-figures method / YanLi Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 737-742 Titre : Effect of different structured POSS/GMA-containing copolymers on the morphology of porous coating by breath-figures method Type de document : texte imprimé Auteurs : YanLi Ma, Auteur ; Ling He, Auteur Année de publication : 2018 Article en page(s) : p. 737-742 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères Matériaux poreux Méthacrylate de glycidyle Morphologie (matériaux) Revêtements Silsesquioxanes oligomères polyhèdres Tags : 'Méthode  des  figures  respiratoires'  'POSS/GMA'  'Effet  solvant'  Coolymères  'Revêtement  organique' Index. décimale : 667.9 Revêtements et enduits Résumé : Polyhedral oligomeric silsesquioxane (POSS) and glycidyl methacrylate (GMA) are used to synthesize linear L-(PGMA-b-MA-POSS), dicephalous D-(PGMA-b-MA-POSS)2, and four-armed T-(PGMA-b-MA-POSS)4 through atom transfer radical polymerization (ATRP). These different structured POSS/GMA-containing copolymers are applied to build the porous films through breath-figures (BF) method. L-(PGMA-b-MA-POSS) is easy to form the ordered porous BF film, and T-(PGMA-b-MA-POSS)4 tends to form well-distributed BF film due to its high segment density which is beneficial to stabilize water drop. It is proven that solvent has a great effect on the morphologies of BF film. The perfect BF film is developed in the relatively wet atmosphere as 5–8 μm diameter of pores casted in THF and 2–4 μm diameter of pores casted in CH2Cl2 with regular morphology. The developed BF film has superior stability than the film developed in natural conditions due to the shorter stable balancing time. Therefore, it is believed that the obtained porous films show great potential in coating application. Note de contenu : - EXPERIMENT METHODS AND MATERIALS : Materials - Synthesis of POSS/GMA-containing copolymers - Preparation of BF porous films - Measurements - RESULTS AND DISCUSSIONS : The surface morphology of BF films - The water adsorption behavior of BF films DOI : 10.1007/s11998-018-0083-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0083-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30851 [article]

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Effects of colloidal silica on the properties of POSS-containing fluorinated poly(styrene–acrylate)/SiO2 composite materials / Wenbo Liao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 107-116 Titre : Effects of colloidal silica on the properties of POSS-containing fluorinated poly(styrene–acrylate)/SiO2 composite materials Type de document : texte imprimé Auteurs : Wenbo Liao, Auteur ; Liuyong Zou, Auteur ; Shaona Zheng, Auteur ; Lili Zhao, Auteur ; Xiangxuan Huang, Auteur ; Lingyun Ye, Auteur ; Guoyu Zhong, Auteur Année de publication : 2021 Article en page(s) : p. 107-116 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Colloides Copolymère styrène acrylate Copolymères greffés Dioxyde de silicium Hydrophobie Revêtements organiques Rugosité Silsesquioxanes oligomères polyhèdres Sol-gel, Procédé Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Polyhedral oligomeric silsesquioxane (POSS)-containing fluorinated poly(styrene–acrylate)/SiO2 (POSS-FPSA/SiO2) composite materials were prepared by preemulsification and direct blending method. The SiO2 particles were induced aggregated onto the surface of POSS, and sol–gel processes were simultaneously carried out with addition of co-solvent to form raspberry-like structure. 29Si NMR and XRD results confirmed that POSS were successfully grafted to polymer and were evenly dispersed uniformly in polymer matrix. The average diameter of composite latexes increased from 63 to 81 nm with increasing addition of SiO2 content. AFM and WCA images confirmed that sol–gel processes were promoted by increasing addition of SiO2 content, which improved the roughness and hydrophobicity of composite films. XPS spectra displayed that two kinds of Si–O bonds existed on the surface of composite films. One was related to the Si–O groups of SiO2, and the other was attributed to the Si–O–Si groups obtained from the sol–gel processes. The peak area of the former decreased from 56.86% to 38.78%, while the latter increased from 43.14% to 62.22%. TGA curves demonstrated that the composite film exhibited better thermal stability when the SiO2 content was 10.0%. In addition, serious phase separation would decrease the thermal stability of composite films. Note de contenu : - EXPERIMENTAL : Materials - Preparation of POSS-FPSA/SiO2 composite materials - Characterization - RESULTS AND DISCUSSION : The preparation and structure of POSS-FPSA SiO2 composite materials - Effects SiO2 content on the properties of POSS-FPSA/SiO2 composite materials - Scheme : The synthetic route of PSA, POSS-FPSA, and POSS-FPSA/SiO2 DOI : https://doi.org/10.1007/s11998-020-00384-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00384-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35355 [article]

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Fire retardant coatings / Anuja Chatterjee in PAINTINDIA, Vol. LXVIII, N° 12 (12/2018)  

[article]  inPAINTINDIA > Vol. LXVIII, N° 12 (12/2018) . - p. 67-78 Titre : Fire retardant coatings Type de document : texte imprimé Auteurs : Anuja Chatterjee, Auteur Année de publication : 2018 Article en page(s) : p. 67-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epoxydes Hydroxydes doubles lamellaires Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Nanoparticules Nanotubes Phosphore Polymères -- Additifs Revêtements protecteurs Silicium Silsesquioxanes oligomères polyhèdres Thermodurcissables Index. décimale : 667.9 Revêtements et enduits Résumé : This paper focuses on current trends in the flame retardancy of epoxy-based thermosets. This review examines the incorporation of additives in these polymers, including synergism effects. Reactive flame-retardants—which are incorporated in the polymer backbone—are reported and the use of fire-retardant epoxy coatings for materials protection is also considered. And also explains fire retardant mechanism of nanofiller to develop more efficient fire-retardant nano composites. Actually nanofillers are carbon nanotubes and clay which are attractive materials because addition of small amount of nanofillers can improve mechanical, thermal, electrical properties of plastics without changing the processability. However nanofillers themselves do not show excellent fire retardancy, Nanofilers should combine with other fire retardants. Some combination shows positive synergy and some case shows negative synergy effect. Then effective combination of nanofillers and conventional fire retardants are discussed in this article. Note de contenu : - INCORPORATION OF ADDITIVES : Epoxy and nanoparticle - Organoclays - Layered double hydroxides - Polyhedral oligomeric silsesquioxanes - Carbon nanotubes - REACTIVE FLAME RETARDANTS : Phosphorus-containing networks - Silicon-containing networks - COATINGS En ligne : https://drive.google.com/file/d/1GYhct4xlEDVXp9xEKK5JrEyrXGjRr4np/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31934 [article]

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Kinetics analysis and physical properties of photocured silicate-based thiol-ene nanocomposites : The effects of vinyl POSS ene on the polymerization kinetics and physical properties of thiol-triallyl ether networks / Tolecia S. Clark in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 3 (09/2008) . - p. 345-351 Titre : Kinetics analysis and physical properties of photocured silicate-based thiol-ene nanocomposites : The effects of vinyl POSS ene on the polymerization kinetics and physical properties of thiol-triallyl ether networks Type de document : texte imprimé Auteurs : Tolecia S. Clark, Auteur ; Charles E. Hoyle, Auteur ; Sergei Nazarenko, Auteur Année de publication : 2008 Article en page(s) : p. 345-351 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Matériaux hybrides Photoréticulation Silsesquioxanes oligomères polyhèdres Stabilité thermique Thiols Index. décimale : 667.9 Revêtements et enduits Résumé : The kinetics and thermal/physical properties of the trithiol-TAE (triallyl ether) system were measured with respect to increasing polyoligomeric silsesquioxane (POSS) concentrations in order to understand how the presence of POSS nanoparticles affects network formation at low loadings. Vinyl POSS monomer (vPOSS-Bu4) with both vinyl and carboxylate pendant groups was synthesized via a thermally initiated, free-radical reaction to improve the compatibility of the inorganic particles with the trithiol and triallyl ether comomoners. Chemically modified vPOSS-Bu4 particles were incorporated into the trithiol-TAE polymer networks by a thiol-ene free-radical photopolymerization at molar concentrations of 0, 1, and 5 ene mol%. The polymerization rates were analyzed using real-time FTIR and photo-DSC. The polymerization rates showed no significant changes with increasing vPOSS-Bu4 concentration. Thermal analyses of the films by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) demonstrated that thermal stability improves without affecting T g as the POSS concentration increased. Additionally, scratch resistance increased and flame spread decreased markedly with increasing POSS concentration for concentrations up to 5 mol% vPOSS-Bu4. DOI : 10.1007/s11998-008-9092-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9092-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2978 [article]

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Nanocomposites textiles / Eric Devaux in L'INDUSTRIE TEXTILE, N° 1350 (04/2003)  

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Nanotechnology-enhanced biocomposites for greener technologies / Özgür Seydibeyoglu in JEC COMPOSITES MAGAZINE, N° 79 (03/2013)  

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A novel hydroxyl polyacrylate latex modified by OvPOSS and its application in two-component waterborne polyurethane coatings / Wu Zeng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

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Polyoxymethylene/polyhedral oligomeric silsesquioxane composites : processing, crystallization, morphology and thermo-mechanical behavior / D. Czarnecka-Komorowska in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 5 (11/2016)  

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POSS functionalized with mixed fluoroalkyl and methacryloxy substituents as modifiers for UV-curable coatings / Agnieszka Marcinkowska in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)  

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POSS-vinyl-urethane acrylate-based nanohybrid coating materials / Yasemin Eren in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)  

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Preparation and properties of UV-cured epoxy acrylate/glycidyl-POSS coatings / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)  

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Preparing self-cleaning superhydrophobic fiber@POSS garment fabric by UV-curing-induced high surface roughness / Ping Guo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)  

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