聚丙烯腈
材料科学
热扩散率
涂层
复合材料
光纤
热的
电阻和电导
电加热
表征(材料科学)
纳米
光电子学
光学
纳米技术
聚合物
物理
气象学
量子力学
作者
Jinbo Hou,Xinwei Wang,Shouxin Zhang
摘要
In this work, the thermal diffusivity of single submicron (∼800nm) polyacrylonitrile (PAN) fibers is characterized using the recently developed optical heating and electrical thermal sensing technique. In the experiment, a thin Au film (approximately in the nanometer range) is coated on the surface of nonconductive PAN fibers. A periodically modulated laser beam is used to irradiate suspended individual fibers to achieve noncontact periodical heating. The periodical temperature response of the sample is monitored by measuring the electrical resistance variation of the thin Au coating. The experimental results for three different synthesized PAN fibers with varying Au coating thickness are presented and discussed.
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