Stable and low-resistance polydopamine methacrylamide-polyacrylamide hydrogel for brain-computer interface

作     者：Lanlan Liu Yafeng Liu Ruitao Tang Jun Ai Yinji Ma Ying Chen Xue Feng 刘兰兰;刘亚风;唐瑞涛;艾骏;马寅佶;陈颖;冯雪

作者机构：Institute of Flexible Electronics Technology of THUZhejiangJiaxing Key Laboratory of Flexible Electronics based Intelligent Sensing and Advanced Manufacturing TechnologyJiaxing 314000China AMLDepartment of Engineering MechanicsCentre for Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China Qiantang Science and Technology Innovation CenterHangzhou 310016China College of Aerospace EngineeringChongqing UniversityChongqing 400044China 

基　　金：supported by the National Natural Science Foundation of China(U20A6001,11921002,and 11902292) Zhejiang Province Key Research and Development Project(2021C01183,2020C05004,and 2021C05007-4) the Natural Science Foundation of Zhejiang Province of China(LQ19E030003) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第8期

页      码：2298-2308页

摘      要：Signal drift and performance instability of brain-computer interface devices induced by the interface failure between rigid metal electrodes and soft human skin hinder the precise data acquisition of electroencephalogram(EEG).Thus,it is desirable to achieve a robust interface for brain-computer interface ***,a kind of polydopamine methacrylamide-polyacrylamide(PDMA-PAAM)hydrogel is *** improve the adhesion,dopamine is introduced into the polyacrylamide hydrogel,through the amino and catechol groups of dopamine in an organic-inorganic interface to build a covalent and non-covalent interaction.A strong attachment and an effective modulus transition system can be formed between the metal electrodes and human skin,so that the peeling force between the PDMAPAAM hydrogel and the porcine skin can reach 22 N m^(-1).In addition,the stable conductivity and long-term operating life of the PDMA-PAAM hydrogel for more than 60 days at room temperature are achieved by adding sodium chloride(NaCl)and glycerol,*** PDMA-PAAM hydrogel membrane fabricated in this work is integrated onto a flexible Au electrode applied in a brain-computer *** comparison,the collected EEG signal intensity and waveform are consistent with that of the commercial *** obviously,the flexible electrode with PDMA-PAAM hydrogel membrane is demonstrated to enable a more stable and userfriendly interface.

主 题 词：flexible electronics dopamine hydrogels braincomputer interface electroencephalogram 

学科分类：0711[理学-心理学类] 081702[081702] 07[理学] 08[工学] 0817[工学-轻工类] 080401[080401] 0804[工学-材料学] 080402[080402] 

核心收录：

D　O　I：10.1007/s40843-022-2145-3

馆 藏 号：203112624...