摘要
首先用偶联剂苯胺甲基三乙氧基硅烷(AMTES)对凹凸棒土(ATP)进行表面修饰(AMTES-ATP),然后通过苯胺单体在AMTES-ATP表面的原位化学氧化接枝聚合,制备了基于共价键结合的聚苯胺(PANI)/AMTES-ATP复合材料。利用透射电镜(TEM),红外光谱(FTIR),X射线衍射(XRD),紫外-可见漫反射光谱(UV-vis-DRS)和热重-差热(TG-DTA)分析等技术对复合材料进行了表征。结果表明,复合材料中PANI高分子链是通过偶联剂AMTES以化学键的方式与ATP相结合的,AMTES的桥连作用增加了两相间的接触面积,使PANI在ATP表面形成均匀的包覆层。PANI与ATP之间存在较强的相互作用力,限制了PANI的生长和结晶。由于ATP表面的界电限域效应,使PANI以伸展分子链构象存在。ATP的加入和两相间作用力的存在使复合材料中PANI的热稳定性能有明显的提高。
After ATP were surface modified by coupling agent AMTES （AMTES-ATP）, polyaniline （PANI） was grafted onto the surface of the AMTES-ATP by in situ chemically oxidative polymerization, resulting in PANI/AMTES-ATP composite materials, in which the PANI and ATP were attached each other with a chemical bonds. The composites were characterized by using TEM, FTIR, XRD, UV-vis- DRS and TG-DTA. The results show that the PANI chains are chemically bonded to the ATP surface through the coupling agent AMTES. The bridge-function of AMTES increased the interface contact area of two phases and led to form a uniform PANI coating on the surface of ATP. There are a strong interaction between the PANI chains and ATP that restrains the growth and crystallinity of PANE In the composites, polyaniline was in more extended-chain conformation owing to the confined environment effect of ATP surface. Furthermore, the thermal stability of PANI is improved due to introduction of ATP and the interaction between PANI chains and ATP.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2010年第2期370-376,共7页
Bulletin of the Chinese Ceramic Society
基金
河西学院西部资源环境化学重点实验室面上项目基金(XZ0706)
