摘要
在预氧化过程中通过施加不同张力制备了四组PAN预氧化纤维,并利用单纤维强力测试仪、元素分析仪、X射线衍射仪、扫描电子显微镜等对PAN基碳纤维原丝及预氧化纤维的力学性能、微观结构和表面形貌进行了研究。结果表明,热处理过程中负载张力的增加会引起预氧化纤维表面形貌发生明显变化,预氧化纤维表面整体更加光滑,其(002)晶面的晶粒尺寸变大,微晶择优取向程度增加,预氧化纤维中C元素含量逐渐降低,O元素含量逐渐增加,预氧化纤维的拉伸强度、拉伸模量、断裂伸长率都呈现逐渐降低的趋势。
During the pre-oxidation process,four kinds of PAN-based pre-oxidized fibers were prepared under different tension.Tensile machine,elemental analyser(EA),scanning electron microscope(SEM)and x-ray diffraction(XRD)were used to investigate the mechanical properties,micro-structure and morphology of the PAN-based precursor and pre-oxidized fibers.The results show thatproperties of pre-oxidized fibersare closely associated with the load tension.As the load tension increases,the fiber surface becomes smooth;the crystal size of(002)plane becomes larger;the orientation of micro-crystalincreases;the content of element C decreases and element O increases.Most important,the tensile strength,tensile modulus and break elongation of pre-oxidized fibers decrease as well.
作者
陈秋飞
郭鹏宗
陈晓
谌亚天
张辉
马博谋
王学利
刘勇
CHEN Qiufei;GUO Pengzong;CHEN Xiao;CHEN Yatian;ZHANG Hui;MA Bomou;WANG Xueli;LIU Yong(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620;Zhongfushenying Carbon Fiber Co.Ltd.,Lianyugang Jiangsu,222069;Innovation Center for Textile Science and Technology,Donghua University,Shanghai 201620;Research Center for Analysis and Measurement,Donghua University,Shanghai 201620)
出处
《高科技纤维与应用》
CAS
2022年第6期33-38,共6页
Hi-Tech Fiber and Application
基金
中复神鹰碳纤维西宁有限公司年产14000吨高性能碳纤维及配套原丝建设项目(2021-1635-01)
江苏省重点研发计划项目课题(编号BE2021014-4)。
关键词
聚丙烯腈基碳纤维
预氧化
负载张力
微观结构
力学性能
PAN-based carbon fibers
pre-oxidation
load tension
microstructure
mechanical properties
