重庆大学学报2024，Vol.47Issue(11)：94-103,10.DOI:10.11835/j.issn.1000.582X.2024.11.008
拉伸速率与拉伸温度对PVDF-HFP薄膜压电性能的影响
Effects of stretching rate and temperature on the piezoelectric properties of PVDF-HFP thin films
摘要
Abstract
Stretching is one of the most effective methods to improve the piezoelectric properties of PVDF-HFP films.In this study,PVDF-HFP piezoelectric films were prepared using the solution casting method,and the changes in morphology and crystal structure during stretching were studied by varying the stretching rate and temperature.The results indicate that tensile stress can induce a transformation of the matrix's internal structure from spherical crystals to fibrous crystals,thereby facilitating the transition from the non-polar α-phase to the polar β-phase.Under optimal conditions of a elongation ratio of 5,a stretching temperature of 60℃,and a stretching rate of 10 mm/min,the relative β-phase content exceeds 90%,and the calibrated open circuit voltage reaches 1.50 V under a maximum poling electric field Emax of 60 MV/m.Furthermore,when the maximum poling electric field is increased to 100 MV/m,the calibrated open circuit voltage rises to 2.24 V.The higher poling field improves the orientation of dipole moments within the matrix,leading to enhanced piezoelectric performance.关键词
聚偏氟乙烯-六氟丙烯/拉伸/极化/晶相转变Key words
PVDF-HFP/stretching/poling/phase transformation分类
通用工业技术引用本文复制引用
汪洋,吴良科..拉伸速率与拉伸温度对PVDF-HFP薄膜压电性能的影响[J].重庆大学学报,2024,47(11):94-103,10.基金项目
中央高校基本科研业务费资助项目(2020CDJQY-A008). Supported by the Fundamental Research Funds for the Central Universities(2020CDJQY-A008). （2020CDJQY-A008）
