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Fabrication and evaluation of epoxy nanocomposites and carbon/epoxy composite laminates containing oxidized carbon nanofibers / Don Klosterman in SAMPE JOURNAL, Vol. 43, N° 4 (06-07/2007)

[article]  inSAMPE JOURNAL > Vol. 43, N° 4 (06-07/2007) . - p. 7-17 Titre : Fabrication and evaluation of epoxy nanocomposites and carbon/epoxy composite laminates containing oxidized carbon nanofibers Type de document : texte imprimé Auteurs : Don Klosterman, Auteur ; Melissa Williams, Auteur ; Chris Heitkamp, Auteur ; Regina Donaldson, Auteur ; Charles Browning, Auteur Année de publication : 2007 Article en page(s) : p. 7-17 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Vapor grown carbon nanofibers (VGCF) were dispersed into an epoxy/amine resin at a level of 8 wt% using a high shear, solvent-free process. Six batches of VGCF which differed in the amount of surface oxidation were used in this study, in addition to two control batches of non-oxidized VGCF. The resulting resin mixtures were evaluated for dispersion quality, and then cured under heat and pressure to form solid plaques. Samples were then evaluated for glass transition temperature (Tg), flexure strength, and impact strength. The dispersion quality varied from batch to batch, with batches containing oxidized VGCFs generally containing fewer and smaller agglomerated nanofibers than those containing non-oxidized VGCFs. The Tg values of the nanocomposites were the same or up to 7°C higher than a neat resin sample. Flexure modulus and strength varied from batch to batch, but one batch showed a 237% increase in modulus and 29% increase in flexure strength over neat resin. This same batch also exhibited a 24% increase in Izod impact strength compared to neat resin, although other batches performed more poorly than neat resin. Additional nanofiber/resin mixtures were prepared and used to demonstrate the production of carbon fiber composite laminates using a Resin Film Infusion technique. The impact strength of the carbon fiber laminates containing VGCFs was about 73% higher than those containing no VGCF. However, these results are initial, and fiber volume fraction and void content differences may be partly responsible for variation in impact strength. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Processing of epoxy nanocomposites - Processing of advanced composites - CHARACTERIZATION : Surface oxidation - Dispersion - Glass transition temperature (Tg) - Flexure properties - Impact properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23410 [article]

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High surface area self supported nickel nanostructures / George Hansen in SAMPE JOURNAL, Vol. 43, N° 4 (06-07/2007)

[article]  inSAMPE JOURNAL > Vol. 43, N° 4 (06-07/2007) . - p. 27-29 Titre : High surface area self supported nickel nanostructures Type de document : texte imprimé Auteurs : George Hansen, Auteur ; Kaleb Robinson, Auteur ; Michael Standing, Auteur Année de publication : 2007 Article en page(s) : p. 27-29 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : The surface area of a variety of self supporting three dimensional nickel nanostructures is reported, along with an SEM study of each variety. These nickel nanostrand structures are compared to commercially available nickel powders. The data and photos reveal a significant increase in surface area corresponding to a decrease in diameter. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23411 [article]

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Novel applications of carbon nanofibers / D. Burton in SAMPE JOURNAL, Vol. 43, N° 4 (06-07/2007)

[article]  inSAMPE JOURNAL > Vol. 43, N° 4 (06-07/2007) . - p. 36-40 Titre : Novel applications of carbon nanofibers Type de document : texte imprimé Auteurs : D. Burton, Auteur ; P. Lake, Auteur ; G. G. Tibbetts, Auteur ; M. L. Lake, Auteur Année de publication : 2007 Article en page(s) : p. 36-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbone Nanofibres Index. décimale : 668.4 Plastiques, vinyles Résumé : Carbon nanofibers of the stacked-cup structure have a size, graphitization, and morphology which can be exploited for many novel applications. For Li-ion batteries the intertwined low diameter fibers can provide rapid access for the Li ions during charging and discharging. For composite conductivity applications, carbon nanofibers can lower be polymer resistivity to below 1 Ohm cm. Damping applications are attractive because the nanofibers can reinforce plastics without totally sacrificing damping losses. Note de contenu : - CARBON NANOFIBER MORPHOLOGY - APPLICATIONS : Lithium-ion batteries - Conductive polymers - Vibration damping Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23412 [article]

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Varieties of carbon nanofiber paper / David W. Firsich in SAMPE JOURNAL, Vol. 43, N° 4 (06-07/2007)

[article]  inSAMPE JOURNAL > Vol. 43, N° 4 (06-07/2007) . - p. 58-61 Titre : Varieties of carbon nanofiber paper Type de document : texte imprimé Auteurs : David W. Firsich, Auteur Année de publication : 2007 Article en page(s) : p. 58-61 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Carbon nanofiber from Applied Sciences is a versatile material that can be made more suitable for many applications by processing it into flexible sheets. CNF paper may consist of either pure nanofibers or nanofibers with a variety of incorporated additives such as binders, powders, other fibers, catalysts, or polymeric fillers. Aspects of plain nanofiber paper and modified paper varieties are discussed, with a focus on how the material can be tailored for various applications. Note de contenu : - GENERAL FEATURES OF CARBON NANOFIBER PAPER - APPLICATIONS : Supercapacitors - Fuel Cells - Water electrolysis - Bi-layer nanofiber papers - Batteries - Composites - Future embodiments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23413 [article]

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