摘要
采用常压空气介质阻挡放电(DBD)等离子体技术,分别对PBO、Armos和Twaron 3种高性能连续纤维进行了在线改性处理。使用X-射线光电子能谱(XPS)、扫描电子显微镜(SEM)、原子力显微镜(AFM)、单丝拉伸强度(SFTS)和层间剪切强度(ILSS)等手段对比分析了纤维化学组成、物理形貌与粗糙度、拉伸性能以及纤维增强复合材料界面粘结性能的变化。结果表明:DBD改性后3种纤维表面的氧、氮元素含量以及粗糙程度均增加,其增强的复合材料ILSS分别提高了18.6%,10.2%和24.8%。但是3种纤维的表面氧、氮含量增加程度以及受刻蚀程度却有显著的差异。这可能与纤维的分子构成和耐热性能有一定的关系,综合影响了DBD对复合材料界面粘结性能的改善。同时,在纤维表面及其复合材料界面性能明显改善的等离子体处理条件下,纤维的SFTS没有明显的下降。
Three high-performance continuous fibers PBO, Armos and Twaron were on-line modified by atmospheric air dielectric barrier discharge(DBD) plasma. Then the modified fibers were characterized by X- ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), atomic force microscopy(AFM), measurements of single fiber tensile strength(SFTS) and interlaminar shear strength(ILSS) in terms of their surface chemical composition, morphology, roughness and tensile strength, as well as interfacial adhesion properties of fiber reinforced composites respectively. Results showed that the oxygen and nitrogen content, and the roughness of fiber surface after DBD plasma modification with PBO, Armos and Twaron were all increased, and the ILSS of their composites were enhanced by 18.6%,10.2% and 24.8%, respectively. However, it is important to note that there were significant differences in the increment of oxygen and nitrogen content as well as the etching effect of the surface for the three modified fibers, which might be related to the difference of their molecular structures and thermal performances. Apparently, the atmospheric air dielectric barrier discharge(DBD) plasma treatment is proved to be an effective means to improve the surface performance of the fibers while no harm to their SFTS and thereby the ILSS of the composite composed of a resin with the three fibers may obviously be enhanced.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2015年第1期10-16,共7页
Chinese Journal of Materials Research
基金
国防"十二五"基础科研项目A352×××××××
国家自然科学基金51303106
辽宁省教育厅科学研究一般项目L2014056
沈阳航空航天大学博士启动基金13YB05资助~~
关键词
有机高分子材料
在线改性
常压空气等离子体
表面
界面
organic polymer materials,on-line modification,atmospheric air plasma,surface,interface
