Self-healing hydrogel and preparation method thereof

Abstract

The invention discloses a self-healing hydrogel and a preparation method thereof. The self-healing hydrogel is prepared from an acrylamide monomer, deionized water, a crosslinker, persulfide and N,N,N,N-tetramethylethylenediamine according to a ratio of (2-4) g:(10-20) mL:(10-20) mL:(80-100) mg:(150-200) [mu]L, and also includes an appropriate amount of a hydrophobizing reagent. The deionized water is used as a solvent, so the prepared hydrogel material still has superior mechanical properties after being dried, also has a good self-healing effect and a simple healing condition, and has far-reaching significance in the field of self-healing high-strength gel materials.

Description

technical field

[0001] The invention belongs to the technical field of hydrogel preparation, and in particular relates to a self-healing hydrogel and a preparation method thereof. Background technique

[0002] Hydrogel is a kind of gel material formed by reactions such as polymerization using water as a solvent. Ordinary hydrogels are mostly soft and elastic because they are rich in water, and they shrink and become brittle after losing water. Many hydrogel materials will crack or even break after being applied for a period of time, especially after drying. Self-healing is one of the important properties of gel materials. If the material itself has certain self-healing properties, it can heal itself and remain intact. Most gel materials do not have self-healing properties, and some materials will also undergo self-healing reactions under the stimulation of the external environment (light, temperature, humidity, pH, etc.), so that the mechanical properties of the material ...

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