聚偏氟乙烯-钛酸钡复合材料的介电性能

基金项目: 教育部骨干教师支持项目

详细信息

DIELECTRIC PROPERTY OF BaTiO₃/PVDF COMPOSITE PREPARED BY A MELT PROCESS

摘要

摘要: 用钛酸酯和钛酸丁酯偶联剂对BaTiO₃粉进行表面处理,使用熔融法制备了BaTiO₃/PVDF复合材料薄片。通过疏水亲油实验定性地分析了钛酸酯和钛酸丁酯偶联剂对BaTiO₃粉的偶联作用,通过测定BaTiO₃/PVDF的介电常数和介电损耗角正切值表征了复合材料的介电性能,BaTiO₃/PVDF扫描电子显微镜(SEM)的微观形态分析发现,经过偶联剂表面处理,BaTiO₃粉在PVDF中的分散情况改善。
- BaTiO₃/PVDF /
- 偶联剂 /
- 介电性能
Abstract: The polyvinylidene fluoride (PVDF) with barium titanate (BaTiO₃) was prepared in melt as a dielectric composite. BaTiO₃ was modified by titanate coupling agent and Ti(OBu)₄ coupling agent. The dielectric properties and the interfacial interaction of the composite were examined. It is found that the dielectric constant can reach the highest value when the BaTiO₃ particle is modified by coupling agent contents of 60% and the dielectric loss has a max value when the BaTiO₃ particle is modified by coupling agent of about 30%. The SEM micrographs of BaTiO3/PVDF show that the interfacial interaction between PVDF and BaTiO₃, the weight fraction of BaTiO₃ and the size of modified BaTiO₃ are the keys to the dielectric properties of BaTiO₃/PVDF dielectric composite.
- BaTiO₃/PVDF /
- coupling agent /
- dielectric properties