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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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Titre : 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 Type de document : texte imprimé Auteurs : Tomoya Saito, Auteur ; Shohei Yamazaki, Auteur ; Yusei Tsushima, Auteur ; Katsuyuki Sato, Auteur ; Hideo Sawada, Auteur Année de publication : 2016 Article en page(s) : p. 851-861 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcools
Chlorure de calcium
Composés aliphatiques
Composés fluorés
Fluorure de calcium
Matériaux hybrides
Stabilité thermique
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : A variety of fluorinated aliphatic alcohols such as 1H,1H,2H,2H-nonafluoro-1-hexanol (FA-4), 1H,1H,2H,2H-tridecafluoro-1-n-octanol (FA-6), 1H,1H,2H,2H-heptadecafluoro-1-decanol (FA-8), 1H,1H,2H,2H,6H,6H-nonadecafluoro-1-undecanol (DTFA), 2,3,3,3-tetrafluoro-2-[1,1,2,3,3,3-hexafluoro-2-(heptafluoropropoxy) propoxy]-1-propanol (PO-3-OH), and 2,4,4,5,7,7,8,10,10,11,13,13,14,16,16,17,17,18,18,18-icosafluoro-2,5,8,11,14-pentakis(trifluoromethyl)-3,6,9,12,15-pentaoxaoctadecane-1-ol (PO-6-OH) were applied to the reaction with calcium chloride under alkaline conditions. In these fluorinated alcohols, only the DTFA can react with calcium chloride under alkaline conditions to provide the corresponding fluorinated alcohol/calcium fluoride nanocomposites. This reactivity is due to the relatively higher acidity of the inside methylene unit in the DTFA, whose acidic protons should react with the neighboring fluorines and successively with calcium chloride under alkaline conditions to afford the DTFA/calcium fluoride nanocomposites. Interestingly, the DTFA/CaF2 nanocomposites were found to exhibit a no weight loss characteristic even after calcination at 800°C. More interestingly, the DTFA/CaF2 nanocomposites after calcination at 800°C are applicable to the surface modification of poly(methyl methacrylate) (PMMA) to exhibit both good oleophobicity and lower refractive indices imparted by longer fluoroalkyl units in the composites on the modified PMMA film surfaces, as well as those before calcination of the DTFA/CaF2 nanocomposites. DOI : 10.1007/s11998-016-9797-1 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9797-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27124
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 851-861[article]Réservation
Réserver ce documentWettability 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)
[article]
Titre : 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 Type de document : texte imprimé Auteurs : Arissara Ratcha, Auteur ; Rika Takahashi, Auteur ; Suwadee Kongparakul, Auteur ; Shohei Yamazaki, Auteur ; Hideo Sawada, Auteur Année de publication : 2018 Article en page(s) : p. 211-222 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amphiphobie
Caoutchouc styrène-butadiène
Eau
Huiles et graisses
Hydrophobie
Mouillabilité
Oléophilie
Oligomères
Séparation (technologie)
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3) n -RF; RF = CF(CF3)OC3F7; n = 2, 3: RF-(VM) n -RF] can undergo the sol–gel reaction in the presence of poly(styrene-co-butadiene) (SBR) under alkaline or acidic conditions, respectively, to afford the corresponding fluorinated oligomeric silica/SBR nanocomposites [RF-(VM-SiO2) n -RF/SBR]. Wettability control between superoleophobic and superoleophilic characteristics was observed on the modified superhydrophobic glass surfaces treated with these fluorinated nanocomposites. The nanocomposites, which were prepared under alkaline conditions, can provide a superoleophobic/superhydrophobic (superamphiphobic) characteristic on the modified surface; however, a superoleophilic/superhydrophobic characteristic was observed on the modified surface treated with the fluorinated nanocomposites, which were prepared under acidic conditions. Interestingly, the fluorinated nanocomposite particle powders possessing a superoleophilic/superhydrophobic characteristic were applied to the packing material for the column chromatography to separate not only the mixture of oil and water but also the W/O emulsion to isolate the transparent colorless oil. In addition, these particle powders were found to have a good reusability as the packing materials for the separation of the mixture of oil and water. Note de contenu : - Measurements
- Materials
- Preparation of RF-(VM-SiO2)n-Rf/SBR
- Preparation of modified glass treated with the RF-(VM-SiO2)n-Rf/SBR nanocomposites by casting methodDOI : 10.1007/s11998-017-0003-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0003-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30113
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 1 (01/2018) . - p. 211-222[article]Réservation
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