Preparation method of a conductive self-healing hydrogel and a conductive self-healing circuit

Abstract

The invention provides a living body surface or inside applicable conductive self-healing hydrogel and a production method thereof. The production method of the conductive self-healing hydrogel comprises the steps of preparing aminated gelatin and oxidized sodium alginate, preparing a pyrrole-free self-healing hydrogel from the aminated gelatin and the oxidized sodium alginate, and further addingin pyrrole to prepare the conductive self-healing hydrogel. The applied materials are all biocompatible, and through inter-macromolecule reversible Schiff base structures, can achieve high self-healing performance without external stimuli and offset minor injuries produced during application of a flexible circuit; meanwhile, when patterned in different manners, the conductive self-healing hydrogelcan be applied to fields such as bio-electrodes, sensors and circuits.

Description

Technical field: [0001] The invention belongs to the technical field of functional polymer materials and is based on a self-healing hydrogel with biological affinity. The circuit conducts electricity through conductive polymers and ions in the hydrogel and can achieve self-healing. The mechanical properties of the hydrogel can be effectively improved by performing cross-linking polymerization at low temperature, and can be carried out by screen printing, 3D printing, etc. processing. This kind of circuit has a wide range of applications in biosensors, biomedicine, electronic tattoos, etc. Background technique: [0002] Hydrogel is a cross-linked polymer system that can swell significantly in water without dissolving. Since its internal polymer contains hydrophilic groups that can form hydrogen bonds with water molecules, it can achieve water retention. The hydrogel contains water inside, which is conductive but has low conductivity. Conductive hydrogel is to add a conduct...

AI Technical Summary

Problems solved by technology

Due to the introduction of the second cross-linking method in the hydrogel system, the mechanical properties increased, but its self-healing properties were affected

[0007] Patent CN 103137765 A uses polypyrrole to prepare a bioconductive hydrogel. In this patent, chitosan is used to prepare hydrogel, and then polypyrrole prepared by electrochemical method is crushed by ball milling and mixed into hydrogel to obtain Polypyrrole hydrogel has been developed, which has good electrical conductivity and biocompatibility, but its production process is relatively complicated and difficult to form.

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