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Superelastic heat-resistant anti-freezing composite hydrogel and preparation method thereof

A composite hydrogel and superelastic technology, applied in the field of functional polymer materials, can solve the problems of liquid water vaporization, hydrogel hardening, weakening stretching, etc., and achieve low energy consumption, low equipment requirements, and uniform distribution Effect

Active Publication Date: 2021-08-03
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the hydrogels currently studied are still difficult to maintain good mechanical properties in high or low temperature environments, because only 20-30kJ·mol -1 The weak hydrogen bonding of the liquid water inevitably vaporizes or crystallizes
It is important to note that loss or freezing of water can cause the hydrogel to harden, severely impairing its tensile, compressive and shear properties
In addition, conventional hydrogels gradually dehydrate and burn into ash after ignition, resulting in limited practical applications.

Method used

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  • Superelastic heat-resistant anti-freezing composite hydrogel and preparation method thereof
  • Superelastic heat-resistant anti-freezing composite hydrogel and preparation method thereof
  • Superelastic heat-resistant anti-freezing composite hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.4g of sodium chloride (NaCl) and 1.0g of surfactant cetyltrimethylammonium bromide (CTAB) into 20ml of deionized water, stir at room temperature for 20min until completely dissolved; then add 2.0g of calcium chloride 10ml of aqueous solution, stir until no bubbles are generated, continue to add 254μL of hydrophobic monomer hexadecyl methacrylate and 1ml of co-solvent n-butanol, stir at room temperature for 5h to form a uniform translucent solution; then add 5.0g of hydrophilic monomer acrylamide and 0.04g initiator potassium persulfate, and stirred for 1h until the solution was clear and transparent; then 52 μL of tetramethylethylenediamine was added, and the prepared solution was quickly poured into a glass plate mold of 200mm×200mm×2mm, and the mold was placed on React in an oven at 50° C. for 12 hours to prepare the superelastic heat-resistant and antifreeze composite hydrogel.

Embodiment 2

[0028] Add 0.4g of sodium chloride (NaCl) and 1.0g of surfactant cetyltrimethylammonium bromide (CTAB) into 20ml of deionized water, stir at room temperature for 20min until completely dissolved; then add 4.0g of calcium chloride 10ml of aqueous solution, stirred for 20min until no bubbles were generated, continued to add 254μL of hydrophobic monomer hexadecyl methacrylate and 1ml of co-solvent n-butanol, stirred at room temperature for 5h to form a uniform translucent solution; then added 5.0g of hydrophilic monomer propylene Amide and 0.04g initiator potassium persulfate, and stirred for 1h until the solution is clear and transparent; then add 52μL tetramethylethylenediamine, quickly pour the prepared solution into a glass plate mold of 200mm×200mm×2mm, and place the mold React in an oven at 50° C. for 12 hours to prepare the superelastic heat-resistant and antifreeze composite hydrogel.

Embodiment 3

[0030] Add 0.4g of sodium chloride (NaCl) and 1.0g of surfactant cetyltrimethylammonium bromide (CTAB) into 20ml of deionized water, stir at room temperature for 20min until completely dissolved; then add 6.0g of calcium chloride 10ml of aqueous solution, stirred for 20min until no bubbles were generated, continued to add 254μL of hydrophobic monomer hexadecyl methacrylate and 1ml of co-solvent n-butanol, stirred at room temperature for 5h to form a uniform translucent solution; then added 5.0g of hydrophilic monomer propylene Amide and 0.04g initiator potassium persulfate, and stirred for 1h until the solution is clear and transparent; then add 52μL tetramethylethylenediamine, quickly pour the prepared solution into a glass plate mold of 200mm×200mm×2mm, and place the mold React in an oven at 50° C. for 12 hours to prepare the superelastic heat-resistant and antifreeze composite hydrogel.

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Abstract

The invention relates to superelastic heat-resistant anti-freezing composite hydrogel and a preparation method thereof. The superelastic heat-resistant anti-freezing composite hydrogel is prepared from the following raw materials in parts by weight: 0.2 to 10.0 parts of hydrophobic monomer, 5.0 to 10.0 parts of hydrophilic monomer acrylamide, 0.4 to 0.80 part of sodium chloride, 1.0 to 2.0 parts of surfactant hexadecyl trimethyl ammonium bromide, 2.0 to 10.0 parts of calcium chloride, 0.8 to 1.2 parts of cosolvent, 0.02 to 0.04 part of initiator, 0.02 to 0.04 part of tetramethylethylenediamine and 20.0 to 30.0 parts of deionized water. According to the embodiment of the invention, the calcium chloride is added into the formula of the hydrogel, so that the prepared hydrogel has excellent freeze resistance, heat resistance, flame retardance and lasting mechanical stability, the problem that the hydrogel is easy to lose water in a freezing and drying environment at the temperature below zero DEG C is effectively solved, and the temperature range of application of the hydrogel is greatly expanded; the hydrogel is enabled to move towards the application diversification direction.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a superelastic heat-resistant and antifreeze composite hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a kind of "soft material", which swells quickly to equilibrium in water, and can maintain its shape and three-dimensional network structure, and is insoluble in water, has good elasticity and biocompatibility, so it is used in drug delivery, tissue It is widely used in engineering, sensor construction and other fields. Over the past two decades, hydrophobically modified polyacrylamide hydrogels have been extensively studied. Hydrophobic association hydrogels are mainly based on the hydrophobic association between molecules, and hydrophobic sequences are incorporated into the hydrophilic polymer acrylamide. These hydrophobic association domains act as physical cross-linking points in the network, thereby constructing hydr...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/26C08K13/02C08K3/16C08K5/19C08K5/17C08F220/56C08F220/18
CPCC08J3/075C08F220/56C08J2333/26C08K13/02C08K3/16C08K2003/162C08K5/19C08K5/17C08F220/1818
Inventor 张海全刘紫荆麦俊萍钟洁王宁
Owner HAINAN UNIVERSITY
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