High-sensitivity, ultrawide linear range, antibacterial textile pressure sensor based on chitosan/MXene hierarchical...

Area of Science:

• Materials Science
• Nanotechnology
• Textile Engineering

Background:

• Flexible piezoresistive pressure sensors face challenges in achieving both wide linearity and high sensitivity.
• Developing advanced materials is crucial for next-generation wearable electronics and sensing applications.

Purpose of the Study:

• To develop a high-performance textile pressure sensor with enhanced linearity and sensitivity.
• To investigate the potential applications of the sensor in human action detection and antibacterial functionalities.

Main Methods:

• Fabrication of a novel textile pressure sensor using chitosan (CTS)/MXene fiber with a hierarchical "point to line" architecture.
• Characterization of the sensor's piezoresistive properties, including sensitivity, linearity, and fatigue resistance.
• Evaluation of the sensor's antibacterial efficacy and its application in real-time human action recognition using deep neural networks (CNN).

Main Results:

• The CTS/MXene pressure sensor exhibited a high sensitivity of 1.16 kPa^-1 over an ultrawide linear range of 1.5 MPa.
• The sensor demonstrated excellent durability with low fatigue over 1000 loading/unloading cycles.
• The sensor showed significant antibacterial properties and achieved 98.61% classification accuracy for six human actions.

Conclusions:

• The proposed chitosan/MXene fiber-based textile pressure sensor offers a promising solution for achieving simultaneous wide linearity and high sensitivity.
• The sensor's robust performance, antibacterial properties, and successful application in human action detection highlight its potential for diverse wearable electronic applications.