PE/carbon black compounds for fiber-based heating / Merle Bischoff in CHEMICAL FIBERS INTERNATIONAL, Vol. 66, N° 1 (03/2016)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 66, N° 1 (03/2016) . - p. 43-44 Titre : PE/carbon black compounds for fiber-based heating Type de document : texte imprimé Auteurs : Merle Bischoff, Auteur ; Benjamin Glauß, Auteur ; Adina Händel, Auteur ; Gunnar Seide, Auteur ; Thomas Gries, Auteur Année de publication : 2016 Article en page(s) : p. 43-44 Langues : Anglais (eng) Catégories : Analyse thermique Conducteurs organiques Fibres textiles synthétiques Noir aramide Polyéthylène Thermocinétique Index. décimale : 677.4 Textiles artificiels Résumé : The aim of the study is to investigate the conductivity and heat generation of a compound consisting of 90 wt%, polyethylene (PE) and 10 wto/o carbon black (CB). At this ratio the percolation barrier is exceeded. The produced filaments are highly conductive for polymers with a conductivity of 10 S/m to a = 50 S/m. Compared to pure polymer, which is rather an electric insulator (a = 10-5 S/m to a = 10-12 S/m ), this is a quite good property ; compared to iron or copper in the range of ? = 107 S/m further improvement is needed to have a fully conductive polymer. Indeed, this semiconductive property is the reason vvhy this compound is suitable of fiber-based heating. The electric tosses are used for heat generation. By varying the production process parameters, the influence of different variables is analyzed and the desired properties are optimized. So far, compound produced at the ITA had conductivities in the single-digit S/m area. The improvement by a factor of 10 is further described in the paper. Note de contenu : - Compound manufacture - Determination of conductivity - Thermal analysis - Results - Possible interpretation - Comparison to other studies En ligne : https://drive.google.com/file/d/1RWK2ql8qX_BQ3_oC6dfTvVaCLQQTrhdg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25847 [article]

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Production and functionalizing of bicomponent fibers based on PVDF / Benjamin Glauß in CHEMICAL FIBERS INTERNATIONAL, Vol. 64, N° 4 (12/2014)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 64, N° 4 (12/2014) . - p. 198-200 Titre : Production and functionalizing of bicomponent fibers based on PVDF Type de document : texte imprimé Auteurs : Benjamin Glauß, Auteur ; Isa Bettermann, Auteur ; Wilhelm Steinmann, Auteur ; Stephan Walter, Auteur ; Gunnar Seide, Auteur ; Thomas Gries, Auteur ; Georg Roth, Auteur Année de publication : 2015 Article en page(s) : p. 198-200 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conducteurs organiques Extrusion filage Fibres textiles bi-composant Fibres textiles synthétiques Matériaux piézoélectriques Polyfluorure de vinylidène Polypropylène Rhéologie Index. décimale : 677.4 Textiles artificiels Résumé : This research explains the melt spinning of bicomponent fibers which consist of a conductive polypropylene (PP) core and a sheath with piezoelee tric characteristics (polyvinylidene fluoride). Previously analyzed piezoelectric capabilities of polyvinylidene fluoride (PVDF) are to be exploited in sensor filaments. The fiber core is conductive due to a percolation CNT network in polypropylene. The sheath's piezoelectric effect is based on the formation of an all-trans conformation 13 phase, caused by draw-winding of the fibers. The core and sheath structure are characterized through wide-angle X-ray diffraction (WAXD). The distribution of CNTs in the polymer matrix, which affects the conductivity of the core, was investigated by transmission electron microscopy (TEM). Optical microscopy is used to determine the fibers' diameter regularity (core and sheath). The materials' viscosity is determined by rheometry. Eventually, an LCR tester is used to determine the core's specific resistance. Note de contenu : - AIM OF STUDY - POLYVINYLIDENE FLUORIDE - CONDUCTIVE NANOCOMPOSITES IN POLYMERS - MELT SPINNING AND BICOMPONENT FIBER EXTRUSION - MATERIALS AND METHODS : Material - Fiber production - Characterization - RESULTS AND DISCUSSION : Wide-angle X-ray diffraction (WAXD) - Bright field microscopy - Specific resistivity En ligne : https://drive.google.com/file/d/1FTgCMRkZHa5yrkfpv2bx-wkuO5m9UhCZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22550 [article]

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Production and functionalizing of bicomponent fibers based on PVDF / Benjamin Glauß in CHEMICAL FIBERS INTERNATIONAL, (09/2015)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > (09/2015) . - p. 70-72 Titre : Production and functionalizing of bicomponent fibers based on PVDF Type de document : texte imprimé Auteurs : Benjamin Glauß, Auteur ; Isa Bettermann, Auteur ; Wilhelm Steinmann, Auteur ; Stephan Walter, Auteur ; Gunnar Seide, Auteur ; Thomas Gries, Auteur Année de publication : 2015 Article en page(s) : p. 70-72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Extrusion filage Fibres textiles bi-composant Fibres textiles synthétiques Matériaux hybrides Matériaux piézoélectriques Polyfluorure de vinylidène Polypropylène Index. décimale : 668.9 Polymères Résumé : This research explains the melt spinning of bicomponent fibers which consist of a conductive polypropylene (PP) core and a sheath with piezoelectric characteristics (polyvinylidene fluoride). Previously analyzed piezoelectric capabilities of polyvinylidene fluoride (PVDF) are to be exploited in sensor filaments. The fiber core is conductive due to a percolation CNT network in polypropylene. The sheath's piezoelectric effect is based on the formation of an all-trans conformation ? phase, caused by draw-winding of the fibers. The core and sheath structure are characterized through wide-angle X-ray diffraction (WAXD). The distribution of CNTs in the polymer matrix, which affects the conductivity of the core, was investigated by transmission electron microscopy (TEM). Optical microscopy is used to determine the fibers' diameter regularity (core and sheath). The materials' viscosity is determined by rheometry. Eventually, an LCR tester is used to determine the core's specific resistance. Note de contenu : - AIM OF STUDY - POLYVINYLIDENE FLUORIDE - CONDUCTIVE NANOCOMPOSITES IN POLYMERS - MELT SPINNING AND BICOMPONENT FIBER EXTRUSION - MATERIALS AND METHODS : Material - Fiber production - Characterization - RESULTS AND DISCUSSION : Wide-angle X-ray diffraction (WAXD) - Bright field microscopy - Specific resistivity En ligne : https://drive.google.com/file/d/1RE1muavJLBwQ-nx3TuLeocA5hac1Mguj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24725 [article]

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