2013 Fiscal Year Final Research Report

Preparation of high performance regenerated cellulose fibers by high-speed spinning using nanofillers

Research Project

Project/Area Number	23550239
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Polymer/Textile materials
Research Institution	Shinshu University
Principal Investigator	GOTOH Yasuo 信州大学, 繊維学部, 准教授 (60262698)
Project Period (FY)	2011 – 2013
Keywords	セルロース / 再生繊維 / 高性能化 / カーボンナノチューブ
Research Abstract	We investigated the preparation of high performance regenerated cellulose fibers by a dry-jet wet spinning (Lyocell method) with the assistance of single-walled carbon nanotubes (SWNT). Well and reproducible dispersion of SWNT in the spinning solution could be achieved by simultaneous using two dispersants, sodium deoxycholate and polyvinyl alcohol. When the SWNT content was up to 0.3 wt% against polymer, introduction of SWNT into spinning solution increased the spinning speed, which enhanced mechanical properties of the regenerated fibers obtained. The maximum tensile and knot strengths of the fibers were 1.2 GPa of and 0.6 GPa, respectively. Improvement of the mechanical properties of the fibers is mainly attributed to high molecular orientation of cellulose brought about by high speed winding during spinning.