柔性可拉伸导电材料用于生理信号获取与反馈的研究简述

A Short Review on Bio-signals Acquisition and Feedback via Soft and Stretchable Conductive Materials

生物界面柔性导电材料是新兴的、面向生物界面生理信号采集与反馈的电子电路的基本组成部分。由于人体组织本征上具有柔软特性,与之集成的电子电路也需要是柔性可形变的,以达到最基本的力学匹配。当电路变得柔软之后,在同样力的作用下则更容易产生形变,如何实现导电薄膜在大变形下依然保持导电特性变得尤为重要。本文简单介绍了柔性可拉伸导电材料制备过程中常用的弹性体,包括化学交联弹性体、物理交联弹性体,以及几种常见的导电材料如碳基导电材料、金属导电材料以及导电聚合物等,并总结分析了几种可拉伸导电薄膜的制备方法及在体表贴附式与体内植入式的应用,分析评价了现有方法并给出了未来可能的发展方向。

Bio-interface flexible conductive materials is a new and basic component of electronic circuit for bio-interface physiological signal collection and feedback.Due to the intrinsic softness of human tissues,the integrated electronic circuits need to be flexible and deformable to achieve the most basic mechanical matching.When the circuit becomes soft,it is more likely to deform under the same force.How to realize the conductivity of the conductive film under large deformation is particularly important.This review not only briefly introduces the commonly used elastomers in the preparation of flexible stretchable conductive materials,including chemical cross-linked elastomers,physical cross-linked elastomers,but also introduces several conductive materials such as carbon-based conductive materials,metals,conductive polymers,etc.This paper summarizes and analyzes several methods to realize the stretchable conductive film and its application in the body surface attachment and in-vivo implantation,analyzes and evaluates the existing methods and introduces the possible development direction in the future.