Enhanced Mechanical Strength of Metal Ion-Doped MXene-Based Double-Network Hydrogels for Highly Sensitive and Durable Flexible Sensors

• DOI: 10.1021/acsami.3c12048
• Publication Date: 2023-10-27T19:08:21Z
• Authors: Qin Yang; Mingzi Li; Rong Chen; Dahang Gao; Zhen Wang; Chuanjian Qin; Wenjing Yang; Hu Liu; Pengsheng Zhang

Development of conductive hydrogels with high sensitivity and excellent mechanical properties remains a challenge for constructing flexible sensor devices. Herein, universal strategy is presented enhancing the strength Mxene-based double-network through metal ion coordination effects. Polyacrylamide (PAM)/sodium alginate (SA)/Mxene (PSM-DN) were prepared by impregnation PAM/SA/Mxene (PSM) hydrogels. High electrical conductivity achieved due to MXene nanosheets, while strong bond between ions SA constructs second network that increases hydrogel an order magnitude. Mechanical tests demonstrated elastic modulus matches human tissues. Hence, they can be used as highly sensitive electronic skin recognize movement different joints in humans also pressure sensing interface characters anticounterfeiting information transfer. This work promote practical application high-tech fields, such interaction.