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Endogenous piezoelectric-triboelectric mechanism enables enhanced sensitivity and voltage output of FPI/ANF composite films.

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Title: Endogenous piezoelectric-triboelectric mechanism enables enhanced sensitivity and voltage output of FPI/ANF composite films.
Authors: Zhang, Xu1 (AUTHOR), Lin, Haodong1 (AUTHOR), Zhang, Bilin1 (AUTHOR), Yang, Kai1 (AUTHOR), Miao, Yachuan1 (AUTHOR), Liu, Fei1 (AUTHOR) fayeliu@xpu.edu.cn, Li, Jianwei1,2 (AUTHOR) lijianwei@xpu.edu.cn
Source: Chemical Engineering Journal. Jun2026, Vol. 538, pN.PAG-N.PAG. 1p.
Subjects: Piezoelectric materials, Triboelectricity, Polyimides, Polymeric nanocomposites, Detectors, Aramid fibers, Wearable technology
Abstract: Recent years have seen considerable progress in flexible piezoelectric materials. However, such materials often experience reduced performance under high temperatures or complex mechanical stress, posing persistent challenges in achieving both high piezoelectric output and operational stability. This study introduces a composite film that integrates piezoelectric and triboelectric effects by embedding aramid nanofiber (ANF) into a fluorine polyimide (FPI) matrix using vacuum-assisted filtration. FPI nanofibrous film exhibits outstanding piezoelectric response. Moreover, under mechanical deformation, endogenous triboelectric charges are generated between the ANF and FPI nanofibers, which are endogenous triboelectric electropositive and electronegative, respectively. Thus, the as-fabricated FPI/ANF composite film demonstrates excellent piezoelectric properties with an output voltage of up to 30 V, a sensitivity of 0.86 V·N−1, fast response and recovery times (30 ms and 32 ms, respectively). Notably, the composite film remains functional after 10,000 cycles, indicating exceptional durability. Furthermore, the fabricated sensor can accurately detect human motions. This work offers a viable structural design strategy for high-performance piezoelectric sensors, showing promising potential for applications such as motion monitoring and self-powered wearable devices under extreme conditions. • The FPI nanocomposite film demonstrates exceptional piezoelectric performance coupled with superior thermal stability. • Through endogenous triboelectric enhancement, the FPI/ANF sensor achieves a piezoelectric output voltage up to 30 V. • This system enables precise detection of diverse biomechanical signals with accurate motion recognition capabilities. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Recent years have seen considerable progress in flexible piezoelectric materials. However, such materials often experience reduced performance under high temperatures or complex mechanical stress, posing persistent challenges in achieving both high piezoelectric output and operational stability. This study introduces a composite film that integrates piezoelectric and triboelectric effects by embedding aramid nanofiber (ANF) into a fluorine polyimide (FPI) matrix using vacuum-assisted filtration. FPI nanofibrous film exhibits outstanding piezoelectric response. Moreover, under mechanical deformation, endogenous triboelectric charges are generated between the ANF and FPI nanofibers, which are endogenous triboelectric electropositive and electronegative, respectively. Thus, the as-fabricated FPI/ANF composite film demonstrates excellent piezoelectric properties with an output voltage of up to 30 V, a sensitivity of 0.86 V·N−1, fast response and recovery times (30 ms and 32 ms, respectively). Notably, the composite film remains functional after 10,000 cycles, indicating exceptional durability. Furthermore, the fabricated sensor can accurately detect human motions. This work offers a viable structural design strategy for high-performance piezoelectric sensors, showing promising potential for applications such as motion monitoring and self-powered wearable devices under extreme conditions. • The FPI nanocomposite film demonstrates exceptional piezoelectric performance coupled with superior thermal stability. • Through endogenous triboelectric enhancement, the FPI/ANF sensor achieves a piezoelectric output voltage up to 30 V. • This system enables precise detection of diverse biomechanical signals with accurate motion recognition capabilities. [ABSTRACT FROM AUTHOR]
ISSN:13858947
DOI:10.1016/j.cej.2026.176690