摘要
以阴离子表面活性剂脂肪醇聚氧乙烯醚磷酸盐(AEOPK)为处理剂对聚丙烯腈(PAN)基碳纤维表面进行涂覆改性。通过接触角仪、法拉第筒、场发射扫描电子显微镜和X射线光电子能谱对碳纤维的表面性质进行了研究。测试结果表明,当处理剂的质量分数和吸附量分别为0.5%和3.5mg/g时,AEOPK可在纤维表面均匀分布,碳纤维在树脂基体中的分散性得到明显改善。分析了处理剂对碳纤维/环氧树脂复合材料弯曲性能的影响,发现经过涂覆处理后碳纤维/环氧树脂复合材料弯曲强度和模量较未处理的试样分别提高了3.11倍和1.90倍。研究表明,碳纤维界面间的润湿力和电荷斥力的增加,是其分散性和复合材料弯曲性能增强的主要原因。
Fatty alcohol polyoxyethylene ether phosphate（AEOPK）was employed as a treatment agent for polyacrylonitrile（PAN）-based carbon fiber（CF）surface.The optimum concentration and adsorption amount were decided 0.5% and 3.5mg/g according to the results of contact angle and dispersion coefficient.In addition,the surface charges,morphology and groups of modified CFs were investigated by Faraday cup,FE-SEM and XPS.The results indicate that the AEOPK is evenly distributed on the CF surface,and the dispersion of CFs in the resin matrix is improved dramatically.Furthermore,the flexural strength and modulus of the treated CF composite are proved to increase by 3.11 times and 1.90 times by flexural tests.Research shows that the main reasons for the increase of dispersion and flexural property is attributed to the enhanced wettability of the CF and matrix at their interface and repulsion between the monofilaments.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2016年第7期79-83,88,共6页
Polymer Materials Science & Engineering
基金
高等学校博士学科点专项科研基金项目(20121201110002)
关键词
聚丙烯腈基碳纤维
脂肪醇聚氧乙烯醚磷酸盐
表面电荷
润湿力
分散性
polyacrylonitrile-based carbon fiber
fatty alcohol polyoxyethylene ether phosphate
surface charge
wettability
dispersion
