Gradient CNT/PVDF piezoelectric composite with enhanced force-electric coupling for soccer training  

作　　者：Wanghong Zeng Weili Deng Tao Yang Shenglong Wang Yue Sun Jieling Zhang Xiarong Ren Long Jin Lihua Tang Weiqing Yang 

机构地区：[1]Key Laboratory of Advanced Technologies of Materials(Ministry of Education),School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China [2]Department of Mechanical and Mechatronics Engineering,University of Auckland,Auckland 1010,New Zealand [3]Research Institute of Frontier Science,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Nano Research》2023年第8期11312-11319,共8页纳米研究（英文版）

基　　金：This work was financially supported by Sichuan Science and Technology Program(No.2023NSFSC0313);the Basic Research Cultivation Project(No.2682021ZTPY004);the Sichuan Province Foundation for Distinguished Young Team(No.20CXTD0106);Catalyst Seeding General Grant administered by the Royal Society of New Zealand(Contract 20-UOA-035-CSG).

摘　　要：Real-time monitoring of ball–shoe interactions can provide essential information for high-quality instruction in personalized soccer training,yet existing monitoring systems struggle to reflect specific forces,loci,and durations of action.Here,we design a self-powered piezoelectric sensor constructed by the gradient carbon nanotube/polyvinylidene fluoride(CNT/PVDF)composite to monitor the interactions between the ball and the shoe.Two-dimensional Raman mapping demonstrates the gradient structure of CNT/PVDF prepared by programmable electrospinning combined with a hot pressing.Benefitting from the synergistic effect of local polarization caused by the enrichment of CNT and the reduced diffusion of silver patterns in gradient structure,the as-prepared composite exhibits enhanced force-electric coupling with an excellent sensitivity of 80 mV/N and durability over 15,000 cycles.On this basis,we conformally attach a 3×3 sensor array to a soccer shoe,enabling real-time acquisition of kick position and contact force,which could provide quantitative assessment and personalize guidance for the training of soccer players.This self-powered piezoelectric sensor network system offers a promising paradigm for wearable monitoring under strong impact forces.

关 键 词：mechanical and electrical performance pressure sensor carbon nanotube/polyvinylidene fluoride(CNT/PVDF)composite soccer training 

分 类 号：TB383[一般工业技术—材料科学与工程]