摘要
采用硅烷偶联法对纳米SiO_(2)粒子的表面进行修饰改性,之后与可溶性聚酰亚胺溶液混合,并经高速机械搅拌与球磨分散工艺,制备了不同掺杂量的柔性聚酰亚胺/纳米SiO_(2)复合薄膜。结果表明:随着SiO_(2)掺杂量的提高,复合薄膜的热尺寸稳定性、折射率、介电性能显著改善,同时在可见光区保持有较高透光率、较低浊度以及良好力学性能。改性后的纳米SiO_(2)粒子与聚酰亚胺基体有良好的界面相容性,高效混合工艺进一步提高了纳米粒子的分散性,所制备的聚酰亚胺/纳米SiO_(2)复合薄膜可作为柔性衬底材料应用于穿戴电化学传感器。
In order to improve the interface bond strength,the surface of silica nanoparticles was modified by using silane coupling agent method.The modified nanoparticles were added to soluble polyimide(PI)solution,and then mixed by high-speed mechanical stirring and ball milling.Based on the well dispersed and processed solution,a series of flexible PI hybrid films with different modified nanoSiO content were prepared.The effects of nanoSiO nanoparticle contents and surface modification on the thermal,optical,dielectric and mechanical properties of the films were investigated.The results shown that the interface compatibility of nanoSiO nanoparticles and PI matrix was enhanced due to their surface modification,and the dispersion of modified nanoparticles in the matrix was also improved because of the efficient mixing process.With the amount of nanoSiO nanoparticles increasing,the thermal dimensional stability,optical anisotropy and dielectric properties of the films were all significantly improved.The thermal expansion coefficient of the films decreased dramatically with the increase of nanoSiO content.Meantime,the films could maintain good optical transmittance in the visible light region and relatively low turbidity.The decrease changes of the tensile strength and elongation at break became significantly slow.The films can be widely used as flexible substrate materials for the wearable electrochemical sensors.
作者
陈琳
张宇菲
冯洋
李一锋
朱秀慧
张焜
刘彦廷
Chen Lin;Zhang Yufei;Feng Yang;Li Yifeng;Zhu Xiuhui;Zhang Kun;Liu Yanting(College of Chemistry and Environmental Engineering,Yingkou Institute of Technology,Yingkou 115014)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第6期117-121,共5页
New Chemical Materials
基金
2019年辽宁省自然科学基金指导计划项目(2019-ZD-0371)
营口理工学院2021年大学生创新创业训练计划项目(X202114435075)。
