Conductive cable fibers with insulating surface prepared by coaxial electrospinning of multiwalled nanotubes and cellulose

Minoru Miyauchi, Jianjun Miao, Trevor J. Simmons, Jong Won Lee, Thomas V. Doherty, Jonathan S. Dordick, Robert J. Linhardt

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)2440-2445
Number of pages6
JournalBiomacromolecules
Volume11
Issue number9
DOIs
StatePublished - 13 Sep 2010
Externally publishedYes

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