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

A gel and freezing water technology, applied in the field of hydrogel, can solve the problems of long low temperature retention time, inelasticity of hydrogel, short thawing time, etc., and achieve the effect of good flexibility and stretchability

Active Publication Date: 2021-09-28
广州丰歌生物科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to at least solve the problem that the existing hydrogel is inelastic after freezing and the thawing time is short, and proposes a kind of antifreeze hydrogel, which has good elasticity after freezing, can be curled and stretched, and can be kept at low temperature for a long time. long

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Dissolve 6 g of nanometer laponite (Laponite) in 565.8 g of water and stir for a period of time to form a uniform transparent solution. Weigh 18 g of polymerized monomer acrylamide, 0.3 g of initiator ammonium persulfate, and 0.6 g of chain transfer agent dodecyl mercaptan. g is dissolved in this solution after stirring to form a solution, which is component A; the polymerization accelerator N,N,N,N-tetramethylethylenediamine 0.3g and the silane coupling agent γ-methacryloyloxy Add 3 g of propyltrimethoxysilane to 6 g of ethanol to form a solution, which is component B. Blend component A and component B to form a solution, quickly pour it into a plastic sealing bag to discharge the air and seal it, and leave it to stand at room temperature for 30 minutes to obtain a gel.

[0056] Put the sealed bag in the freezer of the refrigerator, freeze it overnight at minus 15°C, take it out, and measure the tensile length, low temperature retention time, and crimp performance.

Embodiment 2

[0058] Take 60g of montmorillonite and dissolve it in 162g of water to form a uniform transparent solution after stirring for a period of time, weigh 180g of polymerized monomer 2-acrylamide-2-methylpropanesulfonate, 6g of initiator potassium persulfate, and chain transfer agent mercaptoethanol 6g is dissolved in this solution after stirring to form a solution, which is component A; 6g of polymerization accelerator triethanolamine and 60g of silane coupling agent vinyltrimethoxysilane are added to 120g of propylene glycol to form a solution, and this solution is component B . Blend component A and component B to form a solution, quickly pour it into a plastic sealing bag to discharge the air and seal it, and leave it to stand at room temperature for 30 minutes to obtain a gel.

[0059] Put the sealed bag in the freezer of the refrigerator, freeze it overnight at minus 15°C, take it out, and measure the tensile length, low temperature retention time, and crimp performance.

Embodiment 3

[0061] Take 18g of nanometer laponite (Laponite) and dissolve it in 428.4g of water to form a uniform transparent solution after stirring for a period of time, weigh 60g of polymerized monomer acrylic acid, 1g of initiator azobisisobutylamidine hydrochloride, and chain transfer agent thioglycolic acid 2g is dissolved in this solution after stirring to form a solution, which is component A; 0.6g of polymerization accelerator triethanolamine and 30g of silane coupling agent vinyltrimethoxysilane are added to 60g of ethylene glycol to form a solution, this solution is Component B. Blend component A and component B to form a solution, quickly pour it into a plastic sealing bag to discharge the air and seal it, and leave it to stand at room temperature for 30 minutes to obtain a gel.

[0062] Put the sealed bag in the freezer of the refrigerator, freeze it overnight at minus 15°C, take it out, and measure the tensile length, low temperature retention time, and crimp performance.

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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. ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F220/06C08F230/08C08F2/38C08F2/44C08K3/34C09K5/08
CPCC08F220/56C08F220/585C08F220/06C08F2/38C08F2/44C08K3/34C08K3/346C09K5/08C08F230/085
Inventor 刘志阳刘群峰吕惠平
Owner 广州丰歌生物科技有限责任公司
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