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

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Abstract

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.

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Acknowledgements

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), and Catalyst Seeding General Grant administered by the Royal Society of New Zealand (Contract 20-UOA-035-CSG). Thanks for the help from the Analysis and Testing Center of Southwest Jiaotong University.

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Authors and Affiliations

  1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Wanghong Zeng, Weili Deng, Tao Yang, Shenglong Wang, Yue Sun, Jieling Zhang, Xiarong Ren, Long Jin & Weiqing Yang

  2. Department of Mechanical and Mechatronics Engineering, University of Auckland, Auckland, 1010, New Zealand

    Lihua Tang

  3. Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu, 610031, China

    Weiqing Yang

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  1. Wanghong Zeng
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  2. Weili Deng
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  3. Tao Yang
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  9. Lihua Tang
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Correspondence to Weili Deng or Weiqing Yang.

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

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Zeng, W., Deng, W., Yang, T. et al. Gradient CNT/PVDF piezoelectric composite with enhanced force-electric coupling for soccer training. Nano Res. 16, 11312–11319 (2023). https://doi.org/10.1007/s12274-023-5869-6

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