Interfacial Modulation of Polydopamine-Reduced Graphene Oxide for Achieving Highly Conductive and Strong Graphene/Cotton Composite Yarn Toward Smart Wearable Devices  

作　　者：Yujin Zhang Guowen Zhang Yuqi Dong Yongcai Wu Liqian Yu Yongxiao Bai 

机构地区：[1]Institute of Soft‑Matter and Advanced Functional Materials,Gansu Province Carbon New Material Industry Technology Center,School of Materials and Energy,Lanzhou University,Lanzhou 730000,China

出　　处：《Advanced Fiber Materials》2024年第6期1798-1812,共15页先进纤维材料（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52273074);the Central government guided local science and technology development fund project,Gansu Provincial Science and Technology Plan Project(Project Number:22ZY2QA001);Lanzhou Science and Technology Plan Project Funding(Project Number:2021-1-44).

摘　　要：Graphene composite yarns have demonstrated significant potential in the development of multifunctional wearable elec-tronics,showcasing exceptional conductivity,mechanical properties,flexibility,and lightweight design.However,their performance is limited by the weak interfacial interaction between the fibers and graphene.Herein,a polydopamine-reduced graphene oxide(PDA-RGO)interfacial modulation strategy is proposed to prepare graphene-coated cotton yarns with high electrical conductivity and strength.PDA-RGO serves as an interfacial bonding molecule that interacts with the cotton yarn(CY)substrate to establish a hydrogen interface,while interconnecting with highly conductive graphene throughπ-πinterac-tions.The developed interface-designed graphene-coated yarn demonstrates an impressive average electrical conductivity of(856.27±7.02)S/m(i.e.,average resistance of(57.57±5.35)Ω).Simultaneously,the obtained conductive yarn demonstrates an exceptional average tensile strength of(172.03±8.03)MPa,surpassing that of primitive CY by approximately 1.59 times.The conductive yarns can be further used as low-voltage flexible wearable heaters and high-sensitivity pressure sensors,thus showcasing their remarkable potential for high-performance and multifunctional wearable devices in real-world applications.

关 键 词：GRAPHENE Interface modulation Conductive yarn Flexible wearable device 

分 类 号：TQ127.11[化学工程—无机化工]