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<p>MXene, a two-dimensional material with exceptional electrical conductivity, demonstrates substantial potential in pressure sensor applications. Inspired by the hierarchical structure of mammalian skin and aimed at enhancing sensitivity and ensuring durability, a three-layer piezoresistive thin-membrane pressure sensor was composed of bamboo cellulose nanofibers (BCF), aramid nanofibers (ANF) and MXene. The ANF/MXene and BCF/ANF/MXene mixed dispersions were subjected to layer-by-layer filtration, and a three-layer composite membrane was formed after freeze-drying. The middle layer consists of BCF/ANF/MXene (BAM), where the high-strength ANF serves as the structural framework. The strong hydrophilicity of BCF facilitates the formation of a porous structure during freeze-drying, enhancing sensitivity and acting as the primary pressure-sensitive layer. The top and bottom layers are composed of ANF/MXene (AM), which encapsulate the BAM layer, thereby improving the overall mechanical strength of the sensor and enhancing its cyclic stability. The microstructure and interfacial chemistry of the material were characterized by SEM, EDS, XRD, and XPS, while its sensing performance was assessed using a motion controller coupled with a digital source meter. The resulting BCF/ANF/MXene composite membrane pressure sensor exhibits outstanding performance, including the capability to withstand a weight of 500&#xa0;g, a low-pressure detection limit of 0.056&#xa0;kPa, a high sensitivity of up to 86.38&#xa0;kPa<sup>−1</sup> in the low-pressure region, and excellent cyclic stability over 8,000 cycles. The sensor accurately detects various human motions and demonstrates excellent sound detection capabilities. This study provides a novel approach to designing high-performance flexible pressure sensors by integrating biomimetic structures and material synergies, offering promising applications in wearable devices and healthcare monitoring.</p>

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A skin-inspired bamboo cellulose/aramid nanofibers/MXene composite membrane pressure sensor for motion detection and sound sensing

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Xiaolin Ran,
  • Shaojiang Wang,
  • Haoyu Li,
  • Yunlong Wang,
  • Huiru Li,
  • Jiayu Xie,
  • Wenfeng Qin

摘要

MXene, a two-dimensional material with exceptional electrical conductivity, demonstrates substantial potential in pressure sensor applications. Inspired by the hierarchical structure of mammalian skin and aimed at enhancing sensitivity and ensuring durability, a three-layer piezoresistive thin-membrane pressure sensor was composed of bamboo cellulose nanofibers (BCF), aramid nanofibers (ANF) and MXene. The ANF/MXene and BCF/ANF/MXene mixed dispersions were subjected to layer-by-layer filtration, and a three-layer composite membrane was formed after freeze-drying. The middle layer consists of BCF/ANF/MXene (BAM), where the high-strength ANF serves as the structural framework. The strong hydrophilicity of BCF facilitates the formation of a porous structure during freeze-drying, enhancing sensitivity and acting as the primary pressure-sensitive layer. The top and bottom layers are composed of ANF/MXene (AM), which encapsulate the BAM layer, thereby improving the overall mechanical strength of the sensor and enhancing its cyclic stability. The microstructure and interfacial chemistry of the material were characterized by SEM, EDS, XRD, and XPS, while its sensing performance was assessed using a motion controller coupled with a digital source meter. The resulting BCF/ANF/MXene composite membrane pressure sensor exhibits outstanding performance, including the capability to withstand a weight of 500 g, a low-pressure detection limit of 0.056 kPa, a high sensitivity of up to 86.38 kPa−1 in the low-pressure region, and excellent cyclic stability over 8,000 cycles. The sensor accurately detects various human motions and demonstrates excellent sound detection capabilities. This study provides a novel approach to designing high-performance flexible pressure sensors by integrating biomimetic structures and material synergies, offering promising applications in wearable devices and healthcare monitoring.