Conductive hydrogel, conductive hydrogel coil and their preparation methods

Abstract

The invention relates to the technical field of medical polymer materials, in particular to a conductive hydrogel. The conductive hydrogel comprises, by weight, 20%-60% of a polymer, 20%-40% of deionized water, 2%-7% of an electrolyte, 10%-30% of a water retaining agent, 1%-5% of a tackifier, 0.03%-0.2% of an initiator, and 0.03%-1.5% of cross-linking agent, wherein by total weight, the polymer comprises 2%-15% of N-vinylpyrrolidone, 0-10% of acryloyloxyethyl trimethyl ammonium chloride, 5%-25% of 3-sulfopropyl propyl potassium acrylate salt, 3%-15% of acrylic acid, and 0%-10% of N, N-dimethylacrylamide. The invention further provides a conductive hydrogel coil made according to the formula above; the conductive hydrogel coil is good in electric conductivity in use, is well sticky to skin without causing stripping pain or with causing little stripping pain, is well biocompatible with the skin, is good in stability in use with rarity of yellowing, and may stay in certain viscosity in watery, moist or bloody environments. In addition, the invention further relates to a manufacturing method of the conductive hydrogel coil.

Description

technical field [0001] The invention relates to the technical field of medical polymer materials, in particular to a conductive hydrogel, a conductive hydrogel coil and a preparation method thereof. Background technique [0002] Hydrogel (Hydrogel) is a gel with water as the dispersion medium. It introduces a part of hydrophobic groups and hydrophilic groups into water-soluble polymers with a network crosslinked structure. The hydrophilic groups combine with water molecules to connect water molecules. In the interior of the network, the cross-linked polymer formed by the hydrophobic group swelling with water is a kind of polymer with a three-dimensional network structure, which is soft, can absorb a large amount of water in water and swell, and can continue to maintain its original shape after swelling. The original structure is not dissolved. Among them, conductive hydrogel is a kind of hydrogel, which combines the dual characteristics of hydrogel and conductive material, ...

AI Technical Summary

Problems solved by technology

However, the conductivity, biocompatibility, viscosity, mechanical strength and stability of the existing polyelectrolyte conductive hydrogels, especially the viscosity and conductivity in a humid environment, are difficult to unify with each other to achieve the best performance. Excellent effect, which limits the use of conductive hydrogels

Images