材料科学
纳米复合材料
压电
静电纺丝
聚二甲基硅氧烷
聚偏氟乙烯
触觉传感器
复合材料
压力传感器
制作
纳米发生器
纳米颗粒
纳米纤维
膜
聚合物
纳米技术
机械工程
计算机科学
医学
人工智能
病理
遗传学
替代医学
工程类
生物
机器人
作者
Jie Jiang,Shijian Tu,Runfang Fu,Jingjing Li,Fei Hu,Bin Yan,Yingchun Gu,Sheng Chen
标识
DOI:10.1021/acsami.0c08560
摘要
Poly(vinylidene fluoride) (PVDF)-based piezoelectric materials are promising candidates for sensors, transducers, and actuators, due to several distinctive characteristics such as good flexibility, easy processability, and high mechanical resistance. In the present work, PVDF-based nanocomposites loaded with BaTiO3 nanoparticles (NPs) of various weight fractions were prepared by the electrospinning technique and used for the fabrication of a flexible piezoelectric pressure tactile sensor (PPTS). The addition (5, 10, and 20 wt %) of piezoelectric BaTiO3 NPs improves the piezoelectric performance, especially the β phase crystals of PVDF/BaTiO3 (10 wt %) nanocomposites that can reach 91.0%. In addition, the mechanical strength of PVDF/BaTiO3 nanocomposites is up to 26.7 MPa, which is an increase of 66% compared to neat PVDF. It should be emphasized that the elongation at break continuously increases from 71% to 153% with increasing BaTiO3 NPs. More importantly, the PPTS (piezoelectric pressure tactile sensor) with the combination of electrospun PVDF/BaTiO3 nanocomposite membranes and polydimethylsiloxane (PDMS) displays excellent flexibility and linear response to external mechanical force. The flexible PPTS devices capable of detecting different music sounds have potential uses in wide fields, such as voice recognition, speech therapy, and ultrasound imaging.
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