摘要
碳纸作为气体扩散层的基底层材料,是燃料电池的核心组成部件之一。本文以聚丙烯腈基短切碳纤维(PANCF)/中间相沥青基短切碳纤维(MPCF)为原料,通过碳纤维分散、抄纸、浸渍、热压固化及碳化等工艺制备碳纸。研究考察了PANCF/MPCF比例、PANCF长度对碳纸性能的影响。结果表明,随着PANCF/MPCF比例增大,碳纸力学性能有所提升,但导电性能下降;随着PANCF长度的增加,碳纤维分散性有所降低,碳纸电阻率小幅增加,拉伸强度先增后减,弯曲强度呈上升趋势。当PANCF/MPCF比例为5∶5,PANCF长度为6 mm时,所制得的碳纸性能最佳,其电阻率为5.6 mΩ·cm,拉伸强度高达31.6 MPa,弯曲强度高达41.9 MPa。
High performance carbon fiber paper is the core component of fuel cell. Carbon papers were prepared from polyacrylonitrile based carbon fiber(PANCF)/mesophase pitch-based carbon fiber(MPCF) by carbon fiber dispersion, paper making, impregnation, hot pressing curing and carbonization. The effects of PANCF/MPCF ratio and length of PANCF on the property of carbon paper were investigated. The results showed that the mechanical properties were improved, but the electrical conductivity decreased with the increase of PANCF/MPCF ratio. With the increase of PANCF length, the dispersion uniformity of carbon fibers decreased. The resistivity of carbon papers almost didn’t change. Their tensile strength increased first and then decreased, their bending strength showed a rising trend. When PANCF/MPCF ratio was 5∶5 and the PANCF length was 6 mm, the carbon paper had the best performance, with resistivity of 5.6 mΩ·cm, tensile strength of 31.6 MPa and bending strength of 41.9 MPa.
作者
李琪琪
王亚丽
魏成彪
马闻骏
马昌
史景利
LI Qi-qi;WANG Ya-li;WEI Cheng-biao;MA Wen-jun;MA Chang;SHI Jing-li(School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China)
出处
《广州化工》
CAS
2022年第23期51-54,共4页
GuangZhou Chemical Industry
基金
国家十三五重点研发计划项目(No:2017YFB0308200)。
关键词
短切聚丙烯腈基碳纤维
中间相沥青基碳纤维
共混比例
碳纸
chopped PAN-based carbon fiber
mesophase pitch-based carbon fiber
blending proportion
carbon paper
