摘要
使用原位化学氧化聚合的方法,以碳纤维毡(CFF)为骨架,在碳纤维表面生长聚苯胺(PANI),获得具有核壳结构的CFF@PANI复合材料,随后使用聚二甲基硅氧烷(PDMS)对其进行封装.研究反应条件对复合材料结构和性能的影响.结果表明,PANI能够均匀地包裹在碳纤维表面,使CFF的颜色由黑色变为深绿色;接触角和表面能分析结果表明尽管表面生长PANI并未对CFF产生显著影响,但使用PDMS封装后可以大幅度降低材料的表面能;借助多界面结构和界面效应,核壳结构明显提升了材料的界面极化和偶极极化,导致复合材料具有更高的介电弛豫现象,并显著提高了电容和电容压敏效应.
Abstract
Polyaniline(PANI)was grown on the surface of carbon fiber felt(CFF)through in-situ chemical oxidative po-lymerization to obtain a core-shell structural composite.The composite was subsequently encapsulated with polydimeth-ylsiloxane.The influence of reaction condition on the structure and properties of the resultant composite was explored.The results indicated that the PANI particles were uniformly decorated on the surface of carbon fiber,resulting in a color change from black to dark green.Contact angle and surface energy analysis indicated that the surface energy of the com-posite was greatly reduced after encapsulation,though there was no obvious difference between the CFF@PANI compos-ite and CFF.The presence of the core-shell structure enhanced the interfacial and dipole polarization significantly because of the multi-interface structure and interfacial effects.A high dielectric relaxation behavior was achieved for the compo-site,thus improving its capacitance and voltage-sensitive effects significantly.
基金项目
北京市自然科学基金面上项目(2242032)
北京市科技重点项目()
北京市自然科学基金-市教委联合资助项目(KZ202010011019)
国家科技期刊平台
NSTL
万方数据