An electrode-skin interface material, a method of making the same, and an electrode assembly

The composite hydrogel formed by the reversible hydrogen bond interaction between gelatin and polyacrylic acid network solves the problems of decreased adhesion and unstable contact between electrode and skin interface materials during long-term use, and realizes stable signal acquisition and biocompatibility of electrode components under dynamic conditions.

CN122404884APending Publication Date: 2026-07-17ZHEJIANG ELECTROMECHANICAL VOCATIONAL & TECH COLLEGE

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG ELECTROMECHANICAL VOCATIONAL & TECH COLLEGE
Filing Date
2026-05-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing electrode-skin interface materials suffer from problems such as decreased adhesion, unstable contact, signal drift, and motion artifacts during long-term use, making it difficult to meet the requirements for long-term continuous monitoring and repeated use.

Method used

A composite hydrogel with reversible hydrogen bond interactions is formed by gelatin and polyacrylic acid network. Electrode-skin interface material is prepared by free radical polymerization reaction. Combined with sheet structure and flexible electrode substrate, an electrode assembly is formed to adapt to the dynamic deformation of human skin.

Benefits of technology

It improves the contact stability of the electrode-skin interface and the stability of signal acquisition, reduces interface slippage and contact impedance fluctuations caused by skin movement, and enhances the adhesion and biocompatibility of the material.

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Abstract

本发明公开了一种电极‑皮肤界面材料及其制备方法和电极组件。所述界面材料包括聚丙烯酸网络和分散在聚丙烯酸网络中的明胶;所述明胶与聚丙烯酸之间形成可逆氢键相互作用;所述明胶与聚丙烯酸网络聚合前的丙烯酸单体的质量比为(1~5):20。本发明通过在聚丙烯酸网络中引入明胶,并使明胶与聚丙烯酸之间形成可逆氢键,达到构建化学交联与动态物理作用协同复合网络的效果。本发明通过将低力学迟滞的明胶 / 聚丙烯酸复合水凝胶设置于采样电极与人体皮肤之间,达到使界面层随人体皮肤同步变形的效果,从而减少材料响应滞后引起的界面滑移、局部脱离和接触阻抗波动,提高动态条件下的电极‑皮肤接触稳定性。
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