用于触觉感知的自供能可拉伸压电橡胶皮肤电子器件  

Stretchable self-powered epidermal electronics from piezoelectric rubber for tactile sensing

作　　者：姚宽明 姚靖仪 海照 李登峰 解兆谦[2] 于欣格 Yao Kuan-Ming;Yao Jing-Yi;Hai Zhao;Li Deng-Feng;Xie Zhao-Qian;Yu Xin-Ge(Department of Biomedical Engineering,City University of Hong Kong,Hong Kong,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,Dalian University of Technology,Dalian 116023,China)

机构地区：[1]香港城市大学生物医学工程系,中国香港 [2]大连理工大学工程力学系,工业装备结构分析国家重点实验室,大连116023

出　　处：《物理学报》2020年第17期305-313,共9页Acta Physica Sinica

基　　金：香港城市大学研究基金(批准号:9610423,9667199);中央高校基本科研业务费(批准号:DUT20RC(3)032)资助的课题.

摘　　要：柔软、轻薄的皮肤电子器件是当今的研究热点之一,在健康监测、疾病预防及治疗方面有诸多应用.但是目前柔性能量供给器件从厚度和尺寸上仍然无法满足皮肤电子的集成要求.本文主要阐述一种应用压电橡胶复合材料的柔性皮肤电子器件,采用压电陶瓷材料锆钛酸铅(PZT)、聚二甲基硅氧烷(PDMS)和石墨烯的混合体系组成柔性传感器.混合后的压电橡胶材料柔软,轻薄,延展性良好,结合优化力学性能的蛇形结构叉指电极以及PDMS柔性基底,使该器件柔软、可拉伸,能与皮肤无缝紧密贴合.该触觉感知柔性皮肤电子器件不仅可以准确测量2.84—11.72 kPa范围的压力,且能够适应弯曲、拉伸等机械变化,并且在不同方向上的拉伸应变达到20%时都仍然能保持良好的压电性能,证明该器件可以在人体日常动作造成的皮肤应变下保持良好的稳定性能.该器件可以贴于体表以监测并区分触摸、点按、轻拍、敲击等动作,输出的电能足够点亮15个LED灯泡,在自供能皮肤电子领域有巨大发展和应用潜力.Soft,thin,skin-integrated electronics,i.e.epidermal electronics,has become a hotspot in biomedical engineering and drawn great attention for their applications in health monitoring,disease diagnosis and therapies.However,soft powering system is still a challenge for epidermal electronics,since the thickness and weight of the existing flexible energy harvesting and storage devices are very hard to meet the requirements of epidermal electronics.Here we present a stretchable and flexible self-powering epidermal electronic device based on rubbery piezoelectric composites formed by a ternary blend of PDMS,lead zirconate titanate(PZT)and graphene.The mixed PZT rubber is soft,ultra-thin and light weight and intrinsically stretchable.By combining soft PDMS substrate and advanced mechanics designed interdigital electrodes/interconnects,a stretchable and skin-integrated device for tactile sensing is realized.The soft device can not only accurately measure a board range of force from 2.84 kPa to 11.72 kPa but also exhibit great flexibility that can maintain stable performance under various mechanical deformations,such as bending,stretching and twisting.On-skin demonstration tests reveal that this self-powering device can clearly distinguish the differences among mechanical stimulations such as touching,poking,tapping and hitting.Furthermore,the self-powering nature of these devices allows energy to be harvested from daily body actives,for instance,hard touching by hand can lighten up to 15 light-emitting diodes.

关 键 词：压电材料 石墨烯 柔性电子 可穿戴设备 

分 类 号：TM22[一般工业技术—材料科学与工程] TP212[电气工程—电工理论与新技术]