Hydrogel with self-repairing function and preparation method of hydrogel

Abstract

The invention discloses hydrogel with a self-repairing function and a preparation method of the hydrogel. The hydrogel is a hydrophobic unit-UPy (ureido pyrimidinone)-PEG (polyethylene glycol)-UPy-hydrophobic unit polymer. According to the preparation method, firstly, an intermediate Br-PEG-Br and a quadruple hydrogen bonding unit intermediate UPyMA are synthesized and then are copolymerized with hydrophobic units such as butyl acrylate, styrene, methacrylate containing 3-10 carbon and the like, and a target polymer is obtained. The hydrogel has high water-retaining property, varieties of hydrogel with better performance can be prepared by adjusting the proportion of hydrophilic and hydrophobic chain segments in the polymer or changing the variety of a hydrophobic monomer, and the application range is enlarged.

Description

technical field

[0001] The invention relates to the field of self-repairing materials, in particular to a hydrogel with self-repairing function and a preparation method thereof. Background technique

[0002] In recent years, the preparation of hydrogels with self-healing function by synthesizing supramolecular polymers containing hydrogen bonds is an important direction for the study of self-healing materials. Due to the existence of multiple hydrogen bond units in the polymer, a reversible cross-linked network structure is formed inside the polymer, which will dissociate and recombine under the stimulation of the external environment, so as to achieve the purpose of self-healing. Hydrogel can absorb a large amount of water and swell, and has a good water retention effect. It has a certain similarity to biological tissues and has good biocompatibility, so it is widely used in construction, food, biomedicine and other fields.

[0003] Most hydrogels are brittle, which limits...

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