Biomimetic flexible pressure sensor based on elastic conductive microspheres and preparation method thereof

By simplifying the fabrication process and using elastic conductive microspheres, the problems of fabrication complexity and high cost of biomimetic flexible pressure sensors have been solved, resulting in a sensor with high stability and high sensitivity, suitable for wearable and implantable devices.

CN116465524BActive Publication Date: 2026-05-01NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202310267116.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-20
Publication Date
2026-05-01
Estimated Expiration
2043-03-20

AI Technical Summary

Technical Problem

Existing biomimetic flexible pressure sensors are cumbersome and costly to fabricate, and have poor tensile stability and sensitivity, making it difficult to meet the application requirements of wearable and implantable devices.

Method used

A biomimetic flexible pressure sensor based on elastic conductive microspheres was fabricated, including steps of mixing Dow Corning 184 silicone rubber, baking and curing, ultrasonic treatment and vacuum drying. Combined with a mixture of two-dimensional transition metal carbides and carbon nanotubes, a sensor with high stability and high sensitivity was prepared.

Benefits of technology

The manufacturing process has been simplified, the cost has been reduced, and the tensile stability and sensitivity of the sensor have been improved, making it suitable for real-time monitoring of human movement and physiological signals.

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Abstract

The application provides a preparation method of a biomimetic flexible pressure sensor based on elastic conductive microspheres, and comprises the following steps: S1, preparing Dow Corning 184 silicone rubber, and uniformly mixing A glue, B glue and dimethyl silicone oil to obtain a PDMS mixed solution; S2, adding the PDMS mixed solution into an alcohol solution of sodium dodecyl sulfate to obtain an intermediate product; S3, placing the intermediate product into an oven for baking and curing to obtain elastic small balls; S4, placing the elastic small balls into a mixed solution of 75% tetrabutylammonium fluoride aqueous solution and N,N-dimethylformamide, and then performing ultrasonic treatment to obtain pretreated elastic small balls; and S5, dropping a mixed solution of two-dimensional transition metal carbide and carbon nanotubes on the elastic small balls, and then performing vacuum extraction and drying treatment to obtain the biomimetic flexible pressure sensor based on the elastic conductive microspheres. The application further provides the biomimetic flexible pressure sensor and application thereof, and the preparation method is simple, and the prepared sensor has high elasticity, high sensitivity and good tensile stability.
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