Ultrasensitive conductive hydrogels conferred by nanoscale synergistic effect  

基于纳米协同效应的超灵敏导电水凝胶

作　　者：Gangrong Wang Xin Jing Binghan Niu Liya Lin Yaoxun Zhang Jiazhou Zeng Peiyong Feng Yuejun Liu Hao-Yang Mi 王港荣;经鑫;牛柄翰;林丽娅;张垚勋;曾嘉洲;冯培勇;刘跃军;米皓阳(Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China;National&Local Joint Engineering Research Center for Advanced Packaging Material and Technology,Hunan University of Technology,Zhuzhou 412007,China;National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China [2]National&Local Joint Engineering Research Center for Advanced Packaging Material and Technology,Hunan University of Technology,Zhuzhou 412007,China [3]National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450000,China

出　　处：《Science China Materials》2025年第1期226-235,共10页中国科学(材料科学)(英文版)

基　　金：Natural Research Science Foundation of Hunan Province (2023JJ40262, 2020JJ4266, and 2022JJ30225);Research Project of the Educational Commission of Hunan Province (21B0530)。

摘　　要：The inherent limitations of hydrogels,such as low electrical conductivity and inadequate sensitivity,present considerable challenges in flexible electronic applications.To address these issues,we proposed an innovative synthesis technique that synergistically leveraged the nanoscale properties of the conductive fillers including one-dimensional polyaniline and two-dimensional reduced graphene oxide to fabricate hydrogels with exceptional conductivity.This advanced hydrogel exhibited an extraordinary sensitivity with a gauge factor of 27.55,impressive electrical conductivity(7.2 mS/cm),and outstanding stability.Additionally,the hydrogel demonstrated excellent self-adhesion and robust selfhealing properties,attributed to its abundant catechol functionalities,hydrogen bonding interactions,andπ-πstacking.Consequently,the flexible,strain-sensitive,self-powered sensors derived from these hydrogels displayed unparalleled sensing performance,positioning them as highly promising candidates for advanced human-computer interaction systems and sophisticated information transmission applications.水凝胶面临的导电性差和灵敏度低等问题极大限制了其在柔性电子领域中的应用.为此,我们提出了一种利用一维导电填料聚苯胺和二维导电填料还原氧化石墨烯的纳米尺度协同作用机制来制备具有优异导电性的水凝胶.该水凝胶表现出了超高的灵敏度(GF达27.55)、出色的电导率(7.2 mS/cm)和优异的稳定性.此外,由于水凝胶内部含有大量儿茶酚官能团、丰富的氢键相互作用和π-π堆叠,该水凝胶表现出了优异的自粘附性和自修复性.基于该水凝胶开发的具有应变敏感性和自供电性能的柔性传感器展现出了卓越的传感性能,表明其在人机交互和信息传输领域具有广泛应用潜力.

关 键 词：conductive hydrogels sodium alginate POLYANILINE sensitivity reduced graphene oxide 

分 类 号：TQ427.26[化学工程]