Robust,self-adhesive,and low-contact impedance polyvinyl alcohol/polyacrylamide dual-network hydrogel semidry electrode for biopotential signal acquisition  

作　　者：Guangli Li Ying Liu Yuwei Chen Yonghui Xia Xiaoman Qi Xuan Wan Yuan Jin Jun Liu Quanguo He Kanghua Li Jianxin Tang 

机构地区：[1]Hunan Key Laboratory of Biomedical Nanomaterials and Devices,College of Life Sciences and Chemistry,Hunan University of Technology,Zhuzhou,China [2]Department of Neurology,Zhuzhou People's Hospital,Zhuzhou,China [3]Zhuzhou Institute for Food and Drug Control,Zhuzhou,China

出　　处：《SmartMat》2024年第2期67-82,共16页智能材料（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos.62176089,61703152);the Hunan Provincial Natural Science Foundation (Nos.2021JJ30226,2018JJ3134);Scientific Research Foundation of Hunan Provincial Education Department (No.21B0532);Science and Technology Planning Project of Zhuzhou (No.2020015).

摘　　要：Herein,we fabricated a flexible semidry electrode with excellent mechanical performance,satisfactory self-adhesiveness,and low-contact impedance using physical/chemical crosslinked polyvinyl alcohol/polyacrylamide dual-network hydrogels(PVA/PAM DNHs)as an efficient saline reservoir.The resultant PVA/PAM DNHs showed admirable adhesive and compliance to the hairy scalp,facilitating the establishment of a robust electrode/skin interface for biopotential signal transmission.Moreover,the PVA/PAM DNHs steadily released trace saline onto the scalp to achieve the minimized potential drift(1.47±0.39 mV/min)and low electrode–scalp impedance(18.2±8.9 kΩ@10 Hz).More importantly,the application feasibility of real-world brain−computer interfaces(BCIs)was preliminarily validated by 10 participants using two classic BCI paradigms.The mean temporal cross-correlation coefficients between the semidry and wet electrodes in the eyes open/closed and the N200 speller paradigms are 0.919±0.054 and 0.912±0.050,respectively.Both electrodes demonstrate anticipated neuroelectrophysiological responses with similar patterns.This semidry electrode could also effectively capture robust P-QRS-T peaks during electrocardiogram recording.Considering their outstanding advantages of fast setup,user-friendliness,and robust signals,the proposed PVA/PAM DNH-based electrode is a promising alternative to wet electrodes in biopotential signal acquisition.

关 键 词：brain-computer interface dual-network hydrogel electrocardiogram signals electroencephalography signals semidry electrode 

分 类 号：TQ427.26[化学工程]