Conductive Cable Fibers with Insulating Surface Prepared by Coaxial Electrospinning of Multiwalled Nanotubes and Cellulose

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• 作者：Minoru Miyauchi ; Jianjun Miao ; Trevor J. Simmons ; Jong-Won Lee ; Thomas V. Doherty ; Jonathan S. Dordick ; Robert J. Linhardt
• 刊名：Biomacromolecules
• 出版年：2010
• 出版时间：September 13, 2010
• 年：2010
• 卷：11
• 期：9
• 页码：2440-2445
• 全文大小：269K
• 年卷期：v.11,no.9(September 13, 2010)
• ISSN：1526-4602

文摘

Core−sheath multiwalled carbon nanotube (MWNT)−cellulose fibers of diameters from several hundreds of nanometers to several micrometers were prepared by coaxial electrospinning from a nonvolatile, nonflammable ionic liquid (IL) solvent, 1-methyl-3-methylimidazolium acetate ([EMIM][Ac]). MWNTs were dispersed in IL to form a gel solution. This gel core solution was electrospun surrounded by a sheath solution of cellulose dissolved in the same IL. Electrospun fibers were collected in a coagulation bath containing ethanol−water to remove the IL completely and dried to form core−sheath MWNT−cellulose fibers having a cable structure with a conductive core and insulating sheath. Enzymatic treatment of a portion of a mat of these fibers with cellulase selectively removed the cellulose sheath exposing the MWNT core for connection to an electrode. These MWNT−cellulose fiber mats demonstrated excellent conductivity because of a conductive pathway of bundled MWNTs. Fiber mat conductivity increased with increasing ratio of MWNT in the fibers with a maximum conductivity of 10.7 S/m obtained at 45 wt % MWNT loading.