基于氟碳表面活性剂插层水滑石的聚酰亚胺纳米复合材料的制备与性能  

Preparation and Properties of Nanocomposites Based on Polyimide and Polyfluorinated Surfactant-pillared Layered Double Hydroxide

作　　者：郭海泉[1,2] 马晓野[1] 金日哲[1] 康传清[1] 邱雪鹏[1] 高连勋[1] 

机构地区：[1]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130024 [2]中国科学院大学,北京100039

出　　处：《高等学校化学学报》2016年第2期403-408,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51373164);国家“九七三”计划项目(批准号:2012AA03A211)资助~~

摘　　要：以氟碳表面活性剂全氟辛基磺酸钾为插层剂,通过离子交换制备插层水滑石,并以其为填料,通过原位插层聚合方法,制备了水滑石/氟碳表面活性剂/聚酰亚胺纳米复合材料.用X射线衍射、红外光谱和热失重等方法分析插层水滑石结构.结果表明,全氟辛基磺酸钾插层水滑石后,水滑石的层间距由0.76 nm增加到2.52 nm,在水滑石层间构建了氟碳链的微环境.这种氟化水滑石可剥离分散于聚酰亚胺基体中,改善了纳米复合材料的气体阻隔性能、介电性能和机械性能.这种影响不仅体现无机纳米片层的杂化效果,而且展示出氟碳链的特点.Layered double hydroxide was modified with polyfluorinated surfactant via anion-exchange intercalation procedure. The nature of the interlayer anions, the morphology and the thermal stability of the fluorinated LDH （LDH-FS） were investigated by infrared spectrum, X-ray diffraction and thermogravimetry analysis. The interlayer space was expanded from 0. 76 nm to 2.52 nm and the microenvironments with polyfluorinate phase were formed. LDH-FS based polyimide （PI） nanocomposites were prepared by the in situ polymerization and characterized. LDH-FS was well dispersed in the polyimide matrix. The gas barred, mechnical and dielectric properties of the LDH-FS/PI nanocomposites were synthetically effected by the exfoliated inorganic nanolayers and polyfluorocarbon chain.

关 键 词：氟碳表面活性剂 水滑石 聚酰亚胺 纳米复合材料 

分 类 号：O633[理学—高分子化学]