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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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~~
关键词
氟碳表面活性剂
水滑石
聚酰亚胺
纳米复合材料
Polyfluorinated surfactant
Layered double hydroxide
Polyimide
Nanocomposites