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Characterization of fluoropolymer nanofiber sheets fabricated by CO2 laser drawing without solvents / Kei Fukuhara in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10117–10123 Titre : Characterization of fluoropolymer nanofiber sheets fabricated by CO2 laser drawing without solvents Type de document : texte imprimé Auteurs : Kei Fukuhara, Auteur ; Takemune Yamada, Auteur ; Akihiro Suzuki, Auteur Année de publication : 2012 Article en page(s) : pp. 10117–10123 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nanofiber  Fluoropolymer Résumé : Nanofibers of tetrafluoroethylene-perfluoroalkyl vinylether (PFA) copolymer were prepared by irradiating PFA fibers with a CO2 laser under supersonic velocities. This is the only method to make PFA nanofibers without the use of solvents, because for the majority of methods for preparing nanofibers, they must be dissolved in a solvent and PFA fibers cannot be dissolved in most solvents, except special fluorinating reagents. The average fiber diameter of PFA nanofibers was approximately 273 nm. As a result, we developed a CO2 laser supersonic multidrawing (CLSMD) in a new way to produce PFA nanofibers in large quantities. CLSMD can make nanofibers continually in a wide area. The length, width, and thickness of pileup nanofiber sheets are 50 cm, 17 cm, and 70 μm, respectively. It was observed that nanofiber sheets have a higher melting point and degree of crystallinity than microfibers by differential scanning calorimetry (DSC) measurements and have larger crystallite size realized by wide-angle X-ray diffraction (WAXD) measurements. Moreover, it was considered that the interior of nanofiber sheets have oriented structurally and the strength of nanofiber sheets was higher than that of microfibers. Nanoparticles were evolved to the surface of nanofiber sheets by annealing. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301138t [article] Characterization of fluoropolymer nanofiber sheets fabricated by CO2 laser drawing without solvents [texte imprimé] / Kei Fukuhara, Auteur ; Takemune Yamada, Auteur ; Akihiro Suzuki, Auteur . - 2012 . - pp. 10117–10123. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10117–10123 Mots-clés : Nanofiber  Fluoropolymer Résumé : Nanofibers of tetrafluoroethylene-perfluoroalkyl vinylether (PFA) copolymer were prepared by irradiating PFA fibers with a CO2 laser under supersonic velocities. This is the only method to make PFA nanofibers without the use of solvents, because for the majority of methods for preparing nanofibers, they must be dissolved in a solvent and PFA fibers cannot be dissolved in most solvents, except special fluorinating reagents. The average fiber diameter of PFA nanofibers was approximately 273 nm. As a result, we developed a CO2 laser supersonic multidrawing (CLSMD) in a new way to produce PFA nanofibers in large quantities. CLSMD can make nanofibers continually in a wide area. The length, width, and thickness of pileup nanofiber sheets are 50 cm, 17 cm, and 70 μm, respectively. It was observed that nanofiber sheets have a higher melting point and degree of crystallinity than microfibers by differential scanning calorimetry (DSC) measurements and have larger crystallite size realized by wide-angle X-ray diffraction (WAXD) measurements. Moreover, it was considered that the interior of nanofiber sheets have oriented structurally and the strength of nanofiber sheets was higher than that of microfibers. Nanoparticles were evolved to the surface of nanofiber sheets by annealing. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301138t