BTO NWs/PVDF柔性复合薄膜的制备及其压电性能研究  

Preparation and Piezoelectric Properties of BTO NWs/PVDF Flexible Composite Film

作　　者：郭凡 李银辉[1] 马俊格 梁建国 李朋伟[1] GUO Fan;LI Yinhui;MA Junge;LIANG Jianguo;LI Pengwei(Nano-energy and Device Research Center,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学纳米能源与器件研究中心,山西太原030024

出　　处：《压电与声光》2023年第3期389-396,402,共9页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61901293,52075361);山西省重点研发项目(201903D421030);山西省科技重大专项(20201102003);山西省青年科学基金(批准号:20210302124046);山西省面上科学基金(20210302123156)。

摘　　要：该文通过两步水热法制备了钛酸钡纳米线(BTO NWs),采用旋涂法与聚偏氟乙烯(PVDF)复合制备BTO NWs/PVDF复合薄膜。系统地研究了水热反应中不同NaOH浓度、不同反应时间及不同BTO NWs掺杂量对BTO NWs/PVDF复合薄膜压电输出性能的影响,并与商用钛酸钡纳米球(BTO NPs)制备的BTO NPs/PVDF复合薄膜进行了压电性能对比。结果表明,当NaOH浓度为10 mol/L,反应时间为10 h时,BTO NWs/PVDF复合薄膜开路电压和短路电流分别可达5.42 V和1.81μA。当BTO NWs掺杂量(质量分数)为20%时,复合压电薄膜的开路电压可达9.34 V,短路电流可达2.15μA,分别是BTO NPs/PVDF复合薄膜输出电压和电流的1.92倍和1.49倍。当负载电阻值为5 MΩ时,BTO NWs/PVDF复合薄膜输出功率可达1.44μW。经过4000次循环敲击测试,BTO NWs/PVDF复合薄膜表现出良好的机械稳定性,其有望在自供电器件、柔性可穿戴电子设备等领域得到广泛应用。In this paper,the barium titanate nanowires(BTO NWs)were prepared by two-step hydrothermal method,then compounding with the polyvinylidene fluoride(PVDF)by spin coating method to prepare the BTO NWs/PVDF composite films.The effects of different NaOH concentrations,different reaction times and different BTO NWs doping amounts on the piezoelectric output performance of BTO NWs/PVDF composite films in the hydrothermal reactions were systematically studied,and its piezoelectric properties were compared with those of BTO NPs/PVDF composite films prepared by the commercial barium titanate nanospheres(BTO NPs).The results show that when the NaOH concentration is 10 mol/L and the reaction time is 10 h,the open-circuit voltage and short-circuit current of BTO NWs/PVDF composite film can reach 5.42 V and 1.81μA,respectively.When the doping amount of BTO NWs is 20wt%,the open-circuit voltage and short-circuit current of the composite piezoelectric film can reach 9.34 V and the short-circuit current can reach 2.15μA,which is 1.92 and 1.49 times that of the BTO NPs/PVDF composite film,respectively.At a load resistance value of 5 MΩ,the output power of the BTO NWs/PVDF composite film can reach 1.44μW.After 4000 cycles of percussion test,the BTO NWs/PVDF piezoelectric composite film shows good mechanical stability.The prepared BTO NWs/PVDF piezoelectric composite film is expected to be widely used in self-powered devices and flexible wearable electronic devices.

关 键 词：钛酸钡纳米线(BTO NWs) 聚偏氟乙烯(PVDF) 复合压电薄膜 输出特性 

分 类 号：TN384[电子电信—物理电子学]