Flexible Lead-Free Piezoelectric Ba0.94Sr0.06Sn0.09Ti0.91O3/PDMS Composite for Self-Powered Human Motion Monitoring

被引：18

作者：

Deng, Lin ^{[1
]}

Deng, Weili ^{[1
]}

Yang, Tao ^{[1
]}

Tian, Guo ^{[1
]}

Jin, Long ^{[1
]}

Zhang, Hongrui ^{[1
]}

Lan, Boling ^{[1
]}

Wang, Shenglong ^{[1
]}

Ao, Yong ^{[1
]}

Wu, Bo ^{[2
]}

Yang, Weiqing ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China

[2] Southwest Minzu Univ, Sichuan Prov Key Lab Informat Mat, Chengdu 610041, Peoples R China

来源：

JOURNAL OF FUNCTIONAL BIOMATERIALS | 2023年 / 14卷 / 01期

基金：

中国国家自然科学基金;

关键词：

flexible piezoelectric sensor; BSST particles; piezoelectric composites; BSST/PDMS; human motion monitoring; PERFORMANCE; SENSOR; NANOGENERATOR; GRAPHENE; FLUORIDE;

D O I：

10.3390/jfb14010037

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Piezoelectric wearable electronics, which can sense external pressure, have attracted widespread attention. However, the enhancement of electromechanical coupling performance remains a great challenge. Here, a new solid solution of Ba1-xSrxSn0.09Ti0.91O3 (x = 0.00 similar to 0.08) is prepared to explore potential high-performance, lead-free piezoelectric ceramics. The coexistence of the rhombohedral phase, orthorhombic phase and tetragonal phase is determined in a ceramic with x = 0.06, showing enhanced electrical performance with a piezoelectric coefficient of d(33)similar to 650 pC/N. Furthermore, Ba0.94Sr0.06Sn0.09Ti0.91O3 (BSST) is co-blended with PDMS to prepare flexible piezoelectric nanogenerators (PENGs) and their performance is explored. The effects of inorganic particle concentration and distribution on the piezoelectric output of the composite are systematically analyzed by experimental tests and computational simulations. As a result, the optimal V-OC and I-SC of the PENG (40 wt%) can reach 3.05 V and 44.5 nA, respectively, at 138.89 kPa, and the optimal sensitivity of the device is up to 21.09 mV/kPa. Due to the flexibility of the device, the prepared PENG can be attached to the surface of human skin as a sensor to monitor vital movements of the neck, fingers, elbows, spine, knees and feet of people, thus warning of dangerous behavior or incorrect posture and providing support for sports rehabilitation.

引用

页数：11

共 51 条

[1] PHYSICAL BASIS FOR PIEZOELECTRICITY IN PVDF [J].