Amorphous low molecular weight aromatic compounds possessing no weight loss behavior in fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites even after calcination at 800°C / Jittraporn Saengkaew in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 1053-1064 Titre : Amorphous low molecular weight aromatic compounds possessing no weight loss behavior in fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites even after calcination at 800°C Type de document : texte imprimé Auteurs : Jittraporn Saengkaew, Auteur ; Takahumi Ogasawara, Auteur ; Katsumi Yamashita, Auteur ; Suwadee Kongparakul, Auteur ; Masakazu Nishida, Auteur ; Hideo Sawada, Auteur Année de publication : 2020 Article en page(s) : p. 1053-1064 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Composés organiques Diffractométrie de rayons X Fluoropolymères Matériaux amorphes Matériaux hybrides Nitrure de bore Le nitrure de bore est un composé chimique du bore et de l'azote, de formule chimique brute BN (nombre égal d'atomes de chaque élément). Le nitrure de bore est isoélectronique avec le carbone et, comme ce dernier, existe sous plusieurs formes polymorphiques, dont l'une est analogue au diamant et l'autre au graphite. La forme diamant est l'un des matériaux les plus durs connus et la forme graphite est un lubrifiant apprécié. De plus, ces deux polymorphes possèdent des propriétés d'absorption radar. Oligomères Résonance magnétique nucléaire Sol-gel, Procédé Stabilité thermique Vinyltriméthoxysilane Index. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3)n-RF ; n = 2, 3; RF = CF(CF3)OC3F7] undergoes the sol–gel reactions in the presence of hexagonal boron nitride (h-BN) nanoparticles and low molecular weight aromatic compounds (ArHs) such as bisphenol AF (BPAF) and 1-(2-naphthyl)ethanol (Naph-EtOH) under alkaline conditions at room temperature to afford the corresponding fluorinated oligomeric silica/h-BN/ArHs nanocomposites [RF-(VM-SiO3/2)n-RF/h-BN/ArHs]. TG–DTA analyses and XRD spectra measurements show that the encapsulated ArHs in the fluorinated oligomeric silica/h-BN nanocomposites exhibit an amorphous structure, affording no weight loss corresponding to the contents of the ArHs in the nanocomposites even after calcination at 800°C, although the simple blend hybrids of the RF-(VM-SiO3/2)n-RF/h-BN nanocomposites and the original ArHs provide not only the crystal characteristic toward the ArHs but also a clear weight loss behavior in proportion to the contents of the ArHs in the blend hybrids after calcination at 800°C. 1H MAS NMR spectra, UV–Vis spectra, and fluorescent spectra of the RF-(VM-SiO2)n-RF/h-BN/ArHs nanocomposites obtained through the sol–gel reactions under alkaline conditions showed the presence of the ArHs in the nanocomposites, respectively. Note de contenu : - Measurements - Materials - Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride/PBAF nanocomposites [RF-(VM-SiO3/2)n-RF/h-BN/BPAF] - Preparation of simple blend hybrids of the RF-(VM-SiO3/2)n-RF/h-BN nanocomposites and original BPAF - FTIR spectra measurements of the RF-(VM-SiO3/2)n-RF/h-BN/Naph-EtOH nanocomposites DOI : https://doi.org/10.1007/s11998-020-00331-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00331-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34392 [article]

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Controlled surface modification of poly(methyl methacrylate) film by fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites / Jittraporn Saengkaew in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 643-655 Titre : Controlled surface modification of poly(methyl methacrylate) film by fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites Type de document : texte imprimé Auteurs : Jittraporn Saengkaew, Auteur ; Takahumi Ogasawara, Auteur ; Katsumi Yamashita, Auteur ; Seigo Okada, Auteur ; Suwadee Kongparakul, Auteur ; Masakazu Nishida, Auteur ; Hideo Sawada, Auteur Année de publication : 2020 Article en page(s) : p. 643-655 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fluorescence Fluoropolymères Nanoparticules Nitrure de bore Le nitrure de bore est un composé chimique du bore et de l'azote, de formule chimique brute BN (nombre égal d'atomes de chaque élément). Le nitrure de bore est isoélectronique avec le carbone et, comme ce dernier, existe sous plusieurs formes polymorphiques, dont l'une est analogue au diamant et l'autre au graphite. La forme diamant est l'un des matériaux les plus durs connus et la forme graphite est un lubrifiant apprécié. De plus, ces deux polymorphes possèdent des propriétés d'absorption radar. Oléophobie Oligomères Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Revêtements organiques Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3)n-RF; n = 2, 3; RF = CF(CF3)OC3F7] undergoes sol–gel reactions in the presence of hexagonal boron nitride (h-BN) nanoparticles under alkaline or acidic conditions at room temperature to afford the corresponding fluorinated oligomeric silica/h-BN nanocomposites in good isolated yields (~ 80%), respectively. The fluorinated oligomeric silica/h-BN nanocomposites thus obtained were found to exhibit a good dispersibility toward the traditional organic media including water. These two kinds of fluorinated nanocomposites were applied to the surface modification of poly(methyl methacrylate) (PMMA). The fluorinated nanocomposites prepared under alkaline conditions can give not only a good oleophobic characteristic imparted by longer fluoroalkyl groups in the composites but also the higher fluorescent emission related to the presence of h-BN on the only surface side of the modified PMMA film. In contrast, the fluorinated nanocomposites prepared under acidic conditions can provide a good oleophobic characteristic and a higher fluorescent emission on both the surface and even on the reverse side of the PMMA film. Such unique controlled surface modification ability will be discussed by 29Si solid-state NMR spectra of these two types of the nanocomposites. Note de contenu : - EXPERIMENTAL : Materials - MATERIALS : Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites [RF-(VM-SiO2)n-RF/h-BN] - FTIR spectra measurements of the RF-(VM-SiO2)n-RF nanoparticles, and the RF-(VM-SiO2)n-RF/h-BN composites - Preparation of modified PMMA films treated with the RF-(VM-SiO2)n-RF/h-BN nanocomposites DOI : https://doi.org/10.1007/s11998-019-00261-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00261-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34096 [article]

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Facile preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/a, w-dihydroxy-terminated poly(dimethylsiloxane) composite rubber : application to effective removal of fluorinated aromatic compound from aqueous methanol solution by fluoroalkylated silicone composite rubber / Katsumi Yamashita 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. 63-73 Titre : Facile preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/a, w-dihydroxy-terminated poly(dimethylsiloxane) composite rubber : application to effective removal of fluorinated aromatic compound from aqueous methanol solution by fluoroalkylated silicone composite rubber Type de document : texte imprimé Auteurs : Katsumi Yamashita, Auteur ; Taiga Yokouchi, Auteur ; Hideo Sawada, Auteur Année de publication : 2021 Article en page(s) : p. 63-73 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption Caoutchouc Composés aromatiques Composites polymères Fluoropolymères Oligomères Polyalkoxysiloxane 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. Index. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSiOMe)3)n-RF ; n = 2, 3; RF = CF(CF3)OC3F7 : RF-(VM)n-RF] undergoes the sol-gel reactions in the presence of α, ω-dihydroxy-terminated poly(dimethylsiloxane) [HO-(SiMe2O)nH : HPDMS] under non-catalytic conditions to provide the crosslinked RF-(VM)n-RF/HPDMS composite rubber in quantitative isolated yields. Especially, we can isolate the expected composite rubber through the sol-gel reactions, in which the contents of the RF-(VM)n-RF oligomer based on employed oligomer and HPDMS are greater than 0.16 %. In contrast, traditional silane coupling agents such as tetraethoxysilane, methyltrimethoxysilane and triethoxy-1H, 1H, 2H, 2H-tridecafluoro-n-octylsilane were unable to afford the expected composite rubber through the sol-gel reactions with HPDMS under similar conditions. The fluoroalkylated silicone composite rubber thus obtained gave no swelling behavior toward water, dimethyl sulfoxide and methanol ; however, the composite rubber was found to display the higher swelling characteristic for toluene, hexane and tetrahydrofuran, especially for fluorinated aliphatic solvents. Interestingly, it was demonstrated that the fluoroalkylated silicone composite rubber swollen with hexane can adsorb a variety of aromatic compounds in aqueous methanol solutions. More interestingly, we found that the fluoroalkylated silicone composite rubber can exhibit an excellent adsorption ability toward the fluorinated aromatic compounds such as 2', 3', 4', 5', 6'-pentafluoroacetophenone, compared to that of the corresponding non-fluorinated one. Note de contenu : - EXPERIMENTAL : Measurements - Materials - Preparation of fluoroalkyl end-caped vinyltrimethoxisylane oligomer/α, ω-dihydroxy-terminated poly(dimethylsiloxane) composite [Rf-(VM)n-Rf/HPDMS] rubber - Preparation of modified glass treated with the Rf-(VM)n-Rf/HPDMS composite rubber - Evaluation of swelling behavior of the fluoroaklylated silicone composite rubber soaked in a variety of solvents - Adsorption of aromatic compound in aqueous methanol solution by the Rf-(VM)n-Rf/HPDMS DOI : https://doi.org/10.1007/s11998-020-00382-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00382-9-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35351 [article]

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Preparation and applications of two fluoroalkyl end-capped vinyltrimethoxysilane oligomeric composites possessing superoleophilic/superhydrophobic characteristic : a review / Hideo Sawada in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 741-756 Titre : Preparation and applications of two fluoroalkyl end-capped vinyltrimethoxysilane oligomeric composites possessing superoleophilic/superhydrophobic characteristic : a review Type de document : texte imprimé Auteurs : Hideo Sawada, Auteur Année de publication : 2022 Article en page(s) : p. 741-756 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composés aromatiques Composés fluorés Fluoropolymères Hydrophobie Oléophilie Oligomères Séparation huile/eau Substances dangereuses -- Elimination Vinyltriméthoxysilane Index. décimale : 667.9 Revêtements et enduits Résumé : Two fluoroalkyl end-capped vinyltrimethoxysilane oligomers [RF-(CH2CHSi(OMe)3)n-RF; RF = fluoroalkyl group] can be synthesized by reaction of fluoroalkanoyl peroxides [RF-C(=O)O-O(O=)C-RF] with vinyltrimethoxysilane under mild conditions. Fluorinated oligomers thus obtained have been applied to the sol-gel reactions in the presence of a wide range of guest molecules (Guest) under non-catalytic, alkaline or acidic conditions to provide the corresponding fluorinated oligomers/Guest composites. Some of these fluorinated composites were found to exhibit a uperoleophilic/superhydrophobic characteristic on their surface, applying to not only the separation of oil and water but also the selective removal of fluorinated aromatic compounds in aqueous solutions. These findings will be reviewed in this article. Note de contenu : - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/PSt and /PTFE composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric composites containing gluconamide unit - Preparation and properties of fluoroalkyl end-capped oligomeric cellulose derivatives composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/alkyl-modified cellulose derivatives composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/cellulose fiber composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/cellulose nanofiber composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/micro-sized silica gel composite - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/cyclodextrin composites - Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/magnetite composites DOI : https://doi.org/10.1007/s11998-021-00598-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00598-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38069 [article]

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Preparation and properties of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite film / Shinsuke Katayama in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 219-230 Titre : Preparation and properties of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite film Type de document : texte imprimé Auteurs : Shinsuke Katayama, Auteur ; Masato Yasuta, Auteur ; Hideo Sawada, Auteur Année de publication : 2020 Article en page(s) : p. 219-230 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique Allongement à la rupture Colloides Composites Couches minces -- Propriétés mécaniques Oligomères Résistance à la traction Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite [RF-(AMPS)n-RF/PVA] films were prepared by casting homogeneous aqueous methanol solutions containing RF-(AMPS)n-RF/PVA composites, which were prepared by the reactions of the corresponding oligomer with PVA. The transparent colorless RF-(AMPS)n-RF/PVA composite films thus obtained were subjected to tensile testing to evaluate the values of Young’s modulus, tensile strength, and elongation at break. The RF-(AMPS)n-RF/PVA composites films are capable of greater Young’s modulus than the original PVA film (PVA/HCl film), which was prepared by casting the aqueous methanol solution of PVA in the presence of 1 N hydrochloric acid. The polymer film bearing a higher Young’s modulus is, in general, tough and brittle to providing lower elongation at break; however, we can observe a significant increase in both the tensile strength and elongation at break of the RF-(AMPS)n-RF/PVA composite films, compared to those of the PVA/HCl film. In addition, it was demonstrated that the RF-(AMPS)n-RF/PVA composite films can exhibit a higher water adsorption ability than that of the PVA/HCl film. Note de contenu : - Measurements - Materials - Preparation of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer [RF-(AMPS)n-RF]/poly(vinyl alcohol) [PVA] composites - Preparation of fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite films - Mechanical property of the RF-(AMPS)n-RF/PVA composite films - Swelling ratio of the fluoroalkyl end-capped 2-acrylamido-2-methylpropanesulfonic acid oligomer/poly(vinyl alcohol) composite films DOI : 10.1007/s11998-019-00259-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00259-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33740 [article]

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Preparation of amphiphobically modified poly(vinyl alcohol) film by fluoroalkyl end-capped vinyltrimethoxysilane oligomer / Yuta Aomi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

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Reaction of fluorinated aliphatic alcohols with calcium chloride: formation of the fluorinated alcohol/calcium fluoride nanocomposites—thermal stability and application to the surface modification of these nanocomposites / Tomoya Saito in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)  

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Wettability control between superoleophobic and superoleophilic characteristics on the modified superhydrophobic surfaces treated with fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/poly(styrene-co-butadiene) nanocomposites: application to the separation of oil and water / Arissara Ratcha in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)  

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