Conductive Fiber Network Prepared by Carbonization of Cellulose Fiber Network
Cellulose fibers were carbonized at 800 ℃, 900℃, and 1000℃ to make fiber networks havingconducting properties. bDynamic viscoelasticity and electrical conductivity of the conductive fiber networks were examined. The storage modulus,G, and loss modulus,G,of the networks increased with the network concentration, c, and then reached a saturated value. A power law was found between G and c:G=kc a. The exponent, a, however, differed from that of the other power law for non-carbonized cellulosefiber networks. The electrical conductivity,σ, of the conductive fiber networks also increased with c, andthen reached a saturated value. This indicates that the value of network concentration at the saturatedsituation is the percolation threshold, where the carbonized fiber carbon networks begin to be conductive inelectric. The storage modulus and the electrical conductivity began to reach each saturate value at almostthe same concentration, c. This suggests an obvious correlation between the viscoelastic percolation and theelectrical percolation.
Li-wei YU Daisuke Tatsumi1
Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Faculty of Agriculture, Kyushu University, Japan
国际会议
南京
英文
670-672
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）