Anti-freezing hydrogel as well as preparation method and application thereof

Abstract

The invention discloses an anti-freezing hydrogel as well as a preparation method and application thereof. The anti-freezing hydrogel comprises the preparation raw materials: a polymeric monomer, an organic silicon material, a chain transfer agent and alcohols. The organic silicon material, the chain transfer agent and the alcohols are added into the hydrogel, so that the elasticity of the hydrogel in a frozen state can be effectively improved, and the unfreezing time is prolonged. The anti-freezing hydrogel has good bendability and stretchability and can be frozen in a freezing box of a refrigerator, crushed ice crystals are formed on the surface of the frozen gel, a gel body becomes milky white, the gel can be bent, the elongation at break can reach 200% or above, and the retention time at the low temperature can reach 1 h or above.

Description

technical field

[0001] The invention relates to the field of hydrogel technology, in particular to an antifreeze hydrogel and its preparation method and application. Background technique

[0002] Hydrogels consist of a cross-linked network of hydrophilic polymers dispersed in water. The polymer network endows the hydrogel with solid-like mechanical properties, while the large amount of water in the hydrogel endows it with liquid-like transport properties. Many hydrogels are biocompatible, so hydrogels have a wide range of uses in the field of biomedicine. Hydrogel contains a large amount of water, water has a high specific heat capacity, and the latent heat of melting after freezing is high, so hydrogel can be used as cold storage and human body cold therapy materials. But when the temperature of the hydrogel is lowered below the freezing point, the originally elastic and tough hydrogel becomes hard after freezing, lacks elasticity and toughness, and is difficult to curl. ...

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