P(VDF-TFE-HFP)/PTFE双层膜的驻极体行为

The Electret Behavior of P(VDF-TFE-HFP)/PTFE Double Layer Film

通过在Teflon PTFE薄膜上经流延一层P(VDF-TFE-HFP)(简称F_(2,4,6))薄膜,形成了具有非均匀机械和电学性质的P(VDF-TFE-HFP)/PTFE压电双层膜。本文以栅控恒压电晕充电、等温表面电位衰减测量、压电d_(33)系数等温衰减等方法研究了这种新型双层功能膜的压电性质。结果证明这种双层膜的压电活性及压电性的热稳定性均明显优于久负盛名的传统铁电聚合物PVDF。

The hybrid double layer film consisting of PTFE and P(VDF-TFE-HFP) is prepared by casting the P(VDF-TFE-HFP) on the surface of Teflon PTFE film. The piezoelectricity of the double layer film is investi- gated by means of constant voltage corona charging with a grid, measurements of isothermal surface potential de- cay and isothermal d_(33) coefficient decay. The results point out that both piezoelectricity and thermal stability of P(VDF-TFE-HFP)/PTFE double layer film are much better than that of PVDF.