Triple‐network‐based conductive polymer hydrogel for soft and elastic bioelectronic interfaces
Yan Chen,
Liangpeng Chen,
Bowen Geng,
Fan Chen,
Yuan Yuan,
Deling Li,
Yi‐Xuan Wang,
Wang Jia,
Wenping Hu
Affiliations
Yan Chen
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Liangpeng Chen
Department of Neurosurgery, Beijing Tiantan Hospital Capital Medical University Beijing China
Bowen Geng
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Fan Chen
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Yuan Yuan
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Deling Li
Department of Neurosurgery, Beijing Tiantan Hospital Capital Medical University Beijing China
Yi‐Xuan Wang
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Wang Jia
Department of Neurosurgery, Beijing Tiantan Hospital Capital Medical University Beijing China
Wenping Hu
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Abstract Conductive polymer hydrogels have greatly improved the compatibility of electronic devices with biological tissues for human–machine interfacing. Hydrogels that possess low Young's modulus, low interfacial impedance, and high tensile properties facilitate high‐quality signal transmission across dynamic biointerfaces. Direct incorporation of elastomers with conductive polymers may result in undesirable mechanical and/or electrical performance. Here, a covalent cross‐linking network and an entanglement‐driven network with conductive poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) have been combined. The triple‐network conductive hydrogel shows high stretchability (with fracture strain up to 900%), low impedance (down to 91.2 Ω·cm2), and reversible adhesion. Importantly, ultra‐low modulus (down to 6.3 kPa) and strain‐insensitive electrical/electrochemical performance were achieved, which provides a guarantee for low current stimulation. The material design will contribute to the progression of soft and conformal bioelectronic devices, and pave the way to future implantable electronics.
