高β相聚偏氟乙烯基复合体系的制备及压电性能

doi:10.11944/j.issn.1000-0518.2020.12.200133

摘要/Abstract

摘要： 为了提高聚偏氟乙烯(PVDF)的压电性能,需要寻找有效的途径来提高PVDF的电活性相(β相)含量。通过水热法成功合成了Ag、ZnO以及二者复合(Ag-ZnO)的3种类型纳米粒子,并与PVDF共混形成PVDF复合薄膜。通过表征PVDF复合材料的形貌,结晶性能和压电性能,可以发现Ag-ZnO复合纳米粒子的协同作用可以有效提高PVDF的结晶性能和压电性能。此外,通过单轴拉伸可以使得所有PVDF膜的β相含量得到进一步提高,其中拉伸后的PVDF/Ag-ZnO纳米颗粒(P-C)的β相物质的量分数最高,达到70.0％,最佳的压电系数(d₃₃)达到了31.0 pC/N。

关键词: 聚偏氟乙烯, β相, 纳米粒子, 拉伸, 压电系数

Abstract: A high content of the electroactive β phase in polyvinylidene fluoride (PVDF) is one of the prerequisites for achieving excellent piezoresponse and sensing in flexible sensors and wearable electronic devices. Herein, three types of nanoparticles of ZnO, Ag, and their composite (Ag-ZnO) were successfully synthesized by hydrothermal method and compounded with PVDF. The morphological, crystallization and piezoelectric properties of PVDF composites were systematically characterized. The synergistic effect of Ag-ZnO nanoparticles promotes crystallization and piezoelectric properties of PVDF. What's more, after stretching, the amount of β phase of all the PVDF films is further improved, the highest β phase content is 70.0% for stretched PVDF/Ag-ZnO nanoparticles, and the best piezoelectric coefficient (d₃₃) is 31.0 pC/N.

Key words: polyvinylidene fluoride, β phase, nanoparticles, stretching, piezoelectric coefficient

中图分类号:

O631

马安彤, 付超, 楚慧颖, 冉祥海, 聂伟. 高β相聚偏氟乙烯基复合体系的制备及压电性能[J]. 应用化学, 2020, 37(12): 1411-1419.

MA Antong, FU Chao, CHU Huiying, RAN Xianghai, NIE Wei. Fabrication and Piezoelectric Properties of Polyvinylidene Fluoride Composites with High β Phase[J]. Chinese Journal of Applied Chemistry, 2020, 37(12): 1411-1419.

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