摘要
采用连续实验方法,借助X射线衍射、红外光谱、元素分析、力学测试等技术,系统地研究了热氧稳定化过程中聚丙烯腈纤维序态结构、化学结构与生物碳纤维吸附特性、力学性能的内在关联与作用。研究结果表明:聚丙烯腈基热氧稳定化纤维晶区尺寸、取向指数等结构参数与BCF比表面积、吸附特性及力学性能的优劣具有直接内在联系。在热氧稳定化过程中增加聚丙烯腈纤维热氧稳定化结构转化有益于改善生物碳纤维吸附特性,且与生物碳纤维力学性能的变化密切相关。
The correlation between the morphological structure and chemical constitute of polyacrylonitrile (PAN) based oxidized fiber and the characterization of adsorption, mechanical properties and electric conductivity of the biological carbon fiber(BCF) were systematically characterized in a continuous thermal oxidative stabilization process by means of X-ray, electrical resistivity, elemental analysis, IR as well as mechanical testing. The mechanism of formation of BCF were presented and compared on experimental basis. The experimental results show that the crystalline size and orientation indices of the fiber are intimately related to the specific surface area, adsorption properties and mechanical properties of BCF in the thermal oxidative stabilization process. It is found that the adsorption properties BCF increase with increase in the density of PAN-oxidized fiber, which influences the mechanical properties of BCF with optimal values.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
2002年第3期24-27,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
北京市自然科学基金项目(8992011)
关键词
生物碳纤维
聚丙烯腈
炭化
结构
性能
热氧稳定化
biological carbon fiber(BCF)
PAN
thermal oxidation stabilization
structure
property
