Multifunctional Flexible Sensor Based on PU-TA@MXene Janus Architecture for Selective Direction Recognition.

Area of Science:

• Materials Science
• Nanotechnology
• Biomimetics

Background:

• Flexible sensors require multifunctional selectivity and robust mechanical properties.
• Biomimetic designs offer intrinsic response features and enhanced functionalities for sensing materials.

Purpose of the Study:

• To develop a novel flexible sensor film with a biomimetic Janus architecture.
• To investigate the mechanical properties, self-healing performance, and selective sensing capabilities of the proposed material.

Main Methods:

• Fabrication of a tannic acid (TA)-modified MXene-polyurethane film via gravity-driven self-assembly.
• Characterization of the film's mechanical properties, including elongation at break and tensile strength.
• Evaluation of the sensor's response to directional bending, pressure, and stretching, coupled with a machine learning module for data analysis.

Main Results:

• The developed film exhibits superior mechanical properties (2056.67% elongation at break, 50.78 MPa tensile strength) and self-healing performance.
• The bionic Janus architecture enables selective multifunctional sensing of various mechanical stimuli.
• High recognition rates (96.1%) for force detection were achieved using a machine learning module.

Conclusions:

• The proposed tannic acid-modified MXene-polyurethane film with a bionic Janus architecture presents significant advancements in flexible sensor technology.
• The material demonstrates excellent mechanical robustness, self-healing ability, and selective sensing capabilities.
• Potential applications include direction identification in rescue operations and human movement monitoring, highlighting its practical significance.