The high performance conductive hydrogel fiber like spider silk structure has been prepared by Professor Ma Mingming of University of Science & Technology China.

Elastic and stretchable conductive fiber is the key material for the preparation of electronic devices Conductive hydrogels have a certain degree of elasticity and stretchability, but the polymer chains in conductive hydrogels are usually in a state of disorder This disorder structure restricts the mechanical and electrical conductivity of conductive hydrogels By controlling the alignment and orientation of polymer chains in conductive hydrogels, we have prepared a conductive hydrogel fiber with ordered structure, which is a new strategy for the preparation of elastic stretchable conductive fibers and has important application value Spider silk has multi-level ordered structure, which shows excellent mechanical properties Inspired by the ordered structure and spinning method of spider silk, Professor Ma Mingming of University of Science & Technology China has achieved the goal of regulating the alignment and orientation of polymer chains in conductive hydrogels and preparing high-performance conductive hydrogel fibers by gel spinning method: under room temperature, sodium polyacrylate (PAAS) The hydrogel fibers were obtained by direct spinning, and the PMA-PAAS hydrogel fibers (MAPAH fibers) with core shell structure were formed by coating the waterproof layer of polyacrylic acid (PMA) In mapah fiber, PAAS crystal zone and amorphous zone coexist and can change rapidly and reversibly, which makes mapah fiber show excellent mechanical properties, electrical conductivity and frost resistance Mapah fiber has high tensile strength (5.6mpa) and large elongation at break (1200%), and can recover rapidly after large-scale stretching PAAS hydrogel as conductive core (conductivity of 2 S m -1), PMA layer as waterproof and insulating coating, so that MAPAH fiber can be used as high stretch elastic wire Mapah fiber can also maintain its tensile and electrical conductivity at - 35oc, showing excellent frost resistance As a high performance and low-cost stretch stretch conductive hydrogel fiber, MAPAH fiber will be used to develop stretchable electronic devices based on textile materials This achievement was published on nature communications (DOI: 10.1038 / s41467-018-05904-z) Zhao Xue, a master's degree graduate, and Chen Fang, a second year doctoral student, are the co authors of this article The research was supported by the key R & D program of the Ministry of science and technology and the National Natural Science Foundation of China.