折叠结构的PVDF/BTO复合薄膜压电纳米发电机的制备及性能研究  

Preparation and Performance Study of PVDF/BTO Composite Film Piezoelectric Nanogenerators with Folded Structure

作　　者：张昌松[1] 王向阳 魏立柱 王如鹏 ZHANG Changsong;WANG Xiangyang;WEI Lizhu;WANG Rupeng(School of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi’an 710016,China)

机构地区：[1]陕西科技大学机电工程学院,西安710016

出　　处：《材料导报》2024年第6期234-239,共6页Materials Reports

基　　金：西安近代化学研究所开放合作创新基金项目(SYJJ200304)。

摘　　要：为提高聚偏氟乙烯(PVDF)的压电输出性能,将钛酸钡(BTO)纳米颗粒引入到PVDF溶液中,使用流延法制备PVDF/BTO复合压电薄膜,采用高温拉伸与电极化工艺处理复合薄膜。使用扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪、差示扫描量热仪和准静态压电常数测试仪对复合薄膜的形貌和压电性能进行表征,探究BTO含量对PVDF/BTO复合薄膜的影响,研究BTO诱导PVDF链条偶极子重新排列形成β晶型的机理。结果表明,当BTO含量为10%(质量分数)时,PVDF/BTO复合薄膜的晶体结构中β晶型的含量最多,压电性能最强。最后设计了不同层数的折叠结构并组装制成压电纳米发电机(PENG),发现折叠层数越多,PENG的最大输出电压越高。To improve the piezoelectric output performance of polyvinylidene fluoride(PVDF),barium titanate(BTO)nanoparticles were introduced into PVDF solution,and PVDF/BTO composite piezoelectric films were prepared using the flow-delay method,and the composite films were treated by high-temperature stretching and electrodeposition processes.The morphology and piezoelectric properties of the composite films were characterized using scanning electron microscope,X-ray diffractometer,Fourier transform infrared spectrometer,differential scanning calorimeter and quasi-static piezoelectric constant tester to investigate the effect of BTO content on the PVDF/BTO composite films and to study the mechanism of BTO-induced rearrangement of PVDF chain dipoles to formβ-crystalline form.The results show that when the BTO content is 10wt%,the PVDF/BTO composite film has the mostβ-crystalline type in the crystal structure and the strongest piezoelectric properties.Finally,the folded structures with different layers were designed and assembled into piezoelectric nanogenerators(PENG),and it was found that the higher the number of folded layers,the higher the maximum voltage output of PENG.

关 键 词：聚偏氟乙烯 钛酸钡 压电纳米发电机 压电性能 

分 类 号：TM221[一般工业技术—材料科学与工程]