首页|Enhanced Flexoelectricity in Barium Titanate-Cellulose Composite Thin Films

Enhanced Flexoelectricity in Barium Titanate-Cellulose Composite Thin Films

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Biopolymers,the potential flexoelectric materials,are environment-friendly,degradable,lightweight,cost-effective,and pos-sess remarkable processing properties catering to the requirements of advanced devices.However,the flexoelectric coefficient of biopolymers is normally much weaker than that of ceramic materials,limiting their potential applications for designing high-performance green electromechanical coupling devices.To improve the flexoelectric response in biopolymers,we com-posited barium titanate(BTO)with 2,2,6,6-tetramethylpiperidine-l-oxyl-oxidized cellulose nanofibrils(TOCNF)to enhance the flexoelectric response of TOCNF.Owing to the high permittivity and flexoelectric effect of BTO,the relative dielectric constant and flexoelectric coefficient of 33.3 wt％BTO-TOCNF films reached 30.94@1 kHz and 50.05±1.88 nC/m@1 Hz,which were almost 172 times and 27 times higher than those of TOCNF,respectively.The composite thin film contains high dielectric constant and flexoelectric coefficient,as well as excellent flexibility.Our study provided a straightforward and efficient method for improving the flexoelectric effect of biopolymers,and demonstrated its great potential applications in flexoelectric-based devices.

FlexoelectricityCelluloseBaTiO3CompositeThin films

Wensi Xing、Hongyu Cao、Xin Zhang、Xu Liang、Jianwei Song、Shengping Shen

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Chemomechanics and Intelligent Media Laboratory,State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi'an Jiaotong University,Xi'an 710049,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYoung Elite Scientist Sponsorship Program by CAST1000-Plan Program of Shaanxi ProvinceYoung Talent Support Plan of Xi'an Jiaotong University

1227228512322205121222092019QNRC001

2024

10.1007/s10338-024-00493-5

固体力学学报(英文版)
中国力学学会

固体力学学报(英文版)

EI
影响因子：0.214
ISSN：0894-9166
年,卷(期)：2024.37(4)