摘要
采用溶液浇铸法分别制备了氧化石墨烯(GO)与短切碳纤维(CF)改性聚偏氟乙烯(PVDF)复合膜;采用摩擦磨损试验机和数字电桥研究了复合膜的摩擦磨损性能及介电性能。结果表明:在GO和CF添加量较低时(体积分数小于1%),复合膜的摩擦因数较低,同时具有时间稳定性;GO和CF添加量较高时,随时间延长,CF/PVDF复合膜的摩擦因数增大,而GO/PVDF复合膜具有时间稳定性;随着GO和CF添加量增多,复合膜的介电常数先升高后下降,介电损耗先下降后升高;随着频率的增大,复合膜的介电常数缓慢下降,而介电损耗先下降后急剧升高。
The graphene oxide （GO）, chopped carbon fiber （CF） modified poly（vinylidene fluoride） （PVDF） composite films were prepared by the solution casting process. The Friction and wear properties of composite films and dielectric property were studied by friction and wear tester and digital electric bridge, respectively. The results show that when GO or CF content was low （〈1 vol. 1% ）, the friction coefficient of the films decreased and tended to be stable with time. When the content of GO or CF in the films was high, the films showed various behaviors. The frietion coefficient for the former increased with time, while the later had an almost stable friction coefficient. With addition of GO or CF increasing, the dielectric constant of the composite films rose and then dropped, whilst the dielectric-loss decreased at first and then increased. And with the frequency increase the dielectric constant had a slow drop, and the dielectric-loss initially rose and then reduced dramatically.
出处
《机械工程材料》
CAS
CSCD
北大核心
2013年第2期53-56,61,共5页
Materials For Mechanical Engineering
基金
江苏省材料摩擦学重点实验室开放基金资助项目(kjsmcx0901)
关键词
聚偏氟乙烯
氧化石墨烯
碳纤维
摩擦磨损性能
介电性能
polyvinylidene fluoride
graphene oxide
carbon fiber
friction and wear property
dielectricproperty
