Gelatin/PAM double-network hydrogel with high compression strength, and preparation method thereof

Abstract

The invention discloses a gelatin / PAM double-network hydrogel with high compression strength, and a preparation method thereof, and solves the problems of complex process, long consumed time and difficulty in controlling the molar ratio of monomers in the existing preparation method. The preparation method comprises following steps: gelatin is dissolved in water to obtain a solution A; acrylamide,potassium persulfate and N, N-methylene bisacrylamide are added into the solution A, then the temperature is increased to 60 DEG C, and the reaction time is controlled to be 3-5 h; after the reactionis finished, the temperature is reduced to 4 DEG C, and standing is carried out for 1 hour to obtain the gelatin / PAM double-network hydrogel with high compression strength. The preparation method disclosed by the invention is simple in steps, and the prepared high-compression-strength gelatin / PAM double-network hydrogel has relatively good compression resistance and shows excellent self-recoveryperformance.

Description

technical field [0001] The invention belongs to the field of double-network hydrogels, in particular to a gelatin / PAM double-network hydrogel with high compressive strength and a preparation method thereof. Background technique [0002] As a kind of protein, gelatin has the ability to dissolve at high temperature and form gel at low temperature, and the hydrogel formed by itself shows very weak mechanical properties. No major breakthrough was achieved. [0003] Double network hydrogels are special polymer interpenetrating networks formed by two polymers with strong structural asymmetry. Compared with the single polymer network (SN gel), the mechanical strength and toughness of the DN gel are surprisingly improved, which is mainly due to the strong symmetric structure of the first network (rigid and brittle) and the second network ( Soft and tough) are the result of intertwining and interpenetrating. However, the synthesis of double network (DN) hydrogels is usually obtain...

AI Technical Summary

Problems solved by technology

However, the synthesis of double network (DN) hydrogels is usually obtained by a two-step method, and the process of swelling, diffusion and two-step polymerization initiation is involved in the synthesis. These processes are complex, time-consuming and difficult to control the molar ratio of monomers. , so that the mechanical properties of each batch of products cannot be kept consistent, and the cumbersome synthesis steps lead to harsh requirements on the application field

Images