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Anti-freezing hydrogel and preparation method and application thereof

A technology of gel and frozen water, applied in the field of hydrogel, can solve problems such as poor mechanical strength, achieve the effects of good electrical conductivity, strong deformation ability, and easy mass production

Pending Publication Date: 2021-12-31
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a kind of antifreeze hydrogel, preparation method and application, aiming to solve the problem of poor mechanical strength of hydrogel under low temperature conditions in the prior art

Method used

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

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preparation example Construction

[0035] In the second aspect, the embodiment of the present application provides a method for preparing an antifreeze hydrogel, comprising the following steps:

[0036] Step S1, mixing clay and water for the first time to obtain a clay suspension;

[0037] Step S2, adding an inorganic salt and a cross-linked polymer monomer to the clay suspension for a second mixing and dissolving treatment to obtain a dispersion;

[0038] Step S3, adding an initiator to the dispersion for a third mixing treatment, and performing a polymerization reaction to obtain an antifreeze hydrogel.

[0039] In the first aspect of the preparation method of the antifreeze hydrogel in the embodiment of the present application, clay is used as a physical cross-linking agent, and under the action of an initiator, the cross-linked polymer monomer is cross-linked to the cross-linked polymer, and the cross-linked polymer, Inorganic salts and clay are mixed together to form a freeze-resistant hydrogel. In this ...

Embodiment 1

[0048] The present embodiment provides an antifreeze hydrogel and a preparation method thereof, comprising the following steps:

[0049] Sodium magnesium lithium silicate nanoclay and water are prepared into 2wt% sodium magnesium magnesium lithium silicate nanoclay suspension according to the mass ratio of 1:49;

[0050] Weigh 1.6g lithium chloride and stir and dissolve in 10mL of 2wt% sodium magnesium lithium silicate nanoclay suspension, weigh 2.8g sulfobetaine methacrylate and add to the above sodium magnesium lithium silicate nanoclay / chloride in lithium suspension;

[0051] Then add ammonium persulfate with a concentration of 0.2wt%, stir well, and form an antifreeze hydrogel through free radical polymerization.

Embodiment 2

[0053] This embodiment provides an antifreeze hydrogel and a preparation method thereof, comprising the following steps: sodium magnesium lithium silicate nanoclay and water are formulated into a 2wt% sodium magnesium lithium silicate nanoclay suspension according to a mass ratio of 1:49 ;

[0054] Weigh 2g of sodium chloride and stir and dissolve in 10mL of 2wt% sodium magnesium lithium silicate nanoclay suspension, weigh 2.8g of sulfobetaine methacrylate and add it to the above sodium magnesium lithium silicate nanoclay / lithium chloride in suspension;

[0055] Then add ammonium persulfate with a concentration of 0.2wt%, stir well, and form an antifreeze hydrogel through free radical polymerization.

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Abstract

The invention relates to the technical field of hydrogel, and provides anti-freezing hydrogel, a preparation method and application. The anti-freezing hydrogel comprises a mixture of clay, inorganic salt, a cross-linked polymer and water, wherein the cross-linked polymer forms a three-dimensional network structure in water, and the clay and the inorganic salt are dispersed in the three-dimensional network structure to form the anti-freezing hydrogel. The anti-freezing hydrogel provided by the invention comprises clay, inorganic salt, a cross-linked polymer and water, wherein the cross-linked polymer is dissolved in the water and forms a three-dimensional network structure in the water, and due to interaction of the clay, the inorganic salt, the cross-linked polymer and the water, the clay and the inorganic salt can be stably dispersed in the three-dimensional network structure. According to the anti-freezing hydrogel, by means of the water absorption characteristic of the inorganic salt, the anti-freezing hydrogel has the low-temperature anti-freezing characteristic, the anti-freezing hydrogel can still be stretched and compressed under the low-temperature condition, and the physicochemical property of the anti-freezing hydrogel is reserved.

Description

technical field [0001] The application belongs to the technical field of hydrogels, and in particular relates to antifreeze hydrogels, preparation methods and applications. Background technique [0002] Hydrogels are a class of polymers that contain a large amount of water and have a three-dimensional network structure. Due to its special soft and wet characteristics, it has been widely used in the fields of electronic skin, flexible electronic devices, drivers and biomedicine. However, conventional hydrogels are prone to freezing at subzero temperatures and their mechanical properties deteriorate, which severely limits their practical applications in low-temperature environments. [0003] In recent years, studies have introduced organic liquids such as ethylene glycol, glycerol, and dimethyl sulfoxide into hydrogels, and used the interaction between organic liquids and water molecules to inhibit the formation of ice crystal lattices to achieve antifreeze. Hydrogels. Howe...

Claims

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Application Information

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IPC IPC(8): C08F120/38C08K3/16C08K3/34C08J3/075
CPCC08J3/075C08F120/38C08K3/16C08K3/346C08J2333/14
Inventor 赵维巍陈幼幼张晨陈国庆
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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