物理学报Issue(4)：1-7,7.DOI:10.7498/aps.64.046101
聚丙烯腈基碳纤维原丝在纺丝过程中纳米孔变化规律与机理研究∗
Nanop ore change law and mechanism of p olyacrylonitrile based carb on fib er precursor in spinning pro cess
摘要
Abstract
In this paper, we quantitatively characterize the morphological structure parameters including the nanopore size, shape, volume fraction, absolute number of nanopores and total prosity of polyacrylonitrile based carbon fiber precursor. Meanwhile, the change law and reason in the process of washing, drawing in washing, heat-densification, drawing in high pressure steam and hoting-stabilization are investigated. Results show that spinning drawing and high-temperature heat treatment make the prosity of fibers decline gradually in the process of fabrication. The result of micropore volume fraction Vi shows that at the beginning of the spinning and drawing in washing process the Vi of smaller nanopore which is less than 10 nm3 and the Vi of greater nanopore which is larger than 103 nm3 are 0.217 and 0.369, respectively, while these values sharply turn to 0.948 and 0.015 after the late spinning process of hoting-stabilization. The reason for this is not the increase of content of smaller nanopore content in the drawing process in high pressure steam and hoting-stabilization, but the sharp decrease of the greater nanopore content. The result about nanopore shape shows that the spinning multiple drawing in the process increases the axial (long-axis-to-short-axis) ratio of nanopores, while heat treatment over the glass transition temperature reduces the axial ratio of nanopore, and this shrinkage is more significant for smaller nanopores.关键词
聚丙烯腈基碳纤维原丝/纳米孔/纳米孔绝对数量/小角X射线散射Key words
polyacrylonitrile based carbon fiber precursor/nanopore/absolute number of nanopores/small angle X-ray scattering引用本文复制引用
唐海通,敖玉辉,王聪,赵瑞雪,高忠民,孟繁玲..聚丙烯腈基碳纤维原丝在纺丝过程中纳米孔变化规律与机理研究∗[J].物理学报,2015,(4):1-7,7.基金项目
国家重大科学仪器设备开发专项(批准号:2012YQ24026407)和高等学校仪器设备和优质资源共享系统(批准号：CERS-1-3)资助的课题.* Project supported by the Special Foundation of State Major Scientific Instrument and Equipment Development of China (Grant No.2012YQ24026407) and the China Education Resource System (Grant No. CERS-1-3) （批准号:2012YQ24026407）
