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<p>The development of high-performance wearable electronic demands flexible strain sensors with high sensitivity and robust durability. Herein, we present a high-sensitivity flexible strain sensor based on a polydimethylsiloxane/carbon nanotube (PDMS/CNT) nanocomposite incorporated with electrospun cellulose acetate nanofibers (CANF). The unique integration of CANFs endows the PDMS/CANF/CNT nanocomposite with enhanced mechanical strength and tear resistance while maintaining excellent stretchability. The results show that the tensile strength and toughness of the PDMS/CANF/CNT composites increased from 2.80 to 4.20&#xa0;MPa and from 1900.00 to 3900.00&#xa0;kJ/m<sup>3</sup>, respectively. For composites with pre-cut cracks, the tensile strength increased from 0.37 to 1.00&#xa0;MPa, and the toughness increased from 46.55 to 113.90&#xa0;kJ/m<sup>3</sup>. SEM observations reveal that CANFs play a critical role in promoting CNT dispersion and preventing agglomeration in the PDMS composites. The resulting flexible strain sensor demonstrates a high gauge factor and good stability over more than 100 stretching-releasing cycles. Furthermore, it was successfully applied in real-time monitoring of various human joint movements, including those of the elbow, knee, and neck. This work highlights the effectiveness of electrospun nanofiber regulation in fabricating advanced PDMS/CNT nanocomposites for next-generation flexible electronic devices.</p> Graphical abstract <p></p>

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Electrospun cellulose acetate nanofiber-regulated polydimethylsiloxane/carbon nanotube nanocomposites for a high-performance flexible strain sensor

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Chenzhuo Wei,
  • Yanting Niu,
  • Yuqing Zhou,
  • Yujie Ji,
  • Jinda Peng,
  • Yuhao Gu,
  • Xing Zhang,
  • Qian Han,
  • Yang Guo,
  • Jiuli Lei,
  • Nanfeng Zhu,
  • Juqing Cui

摘要

The development of high-performance wearable electronic demands flexible strain sensors with high sensitivity and robust durability. Herein, we present a high-sensitivity flexible strain sensor based on a polydimethylsiloxane/carbon nanotube (PDMS/CNT) nanocomposite incorporated with electrospun cellulose acetate nanofibers (CANF). The unique integration of CANFs endows the PDMS/CANF/CNT nanocomposite with enhanced mechanical strength and tear resistance while maintaining excellent stretchability. The results show that the tensile strength and toughness of the PDMS/CANF/CNT composites increased from 2.80 to 4.20 MPa and from 1900.00 to 3900.00 kJ/m3, respectively. For composites with pre-cut cracks, the tensile strength increased from 0.37 to 1.00 MPa, and the toughness increased from 46.55 to 113.90 kJ/m3. SEM observations reveal that CANFs play a critical role in promoting CNT dispersion and preventing agglomeration in the PDMS composites. The resulting flexible strain sensor demonstrates a high gauge factor and good stability over more than 100 stretching-releasing cycles. Furthermore, it was successfully applied in real-time monitoring of various human joint movements, including those of the elbow, knee, and neck. This work highlights the effectiveness of electrospun nanofiber regulation in fabricating advanced PDMS/CNT nanocomposites for next-generation flexible electronic devices.

Graphical abstract