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Method for preparing high-strength hydrogel

A hydrogel, high-strength technology, applied in the direction of coating, etc., can solve the problem of low mechanical strength of hydrogel, achieve the effect of improving crystallization ability, improving mechanical strength and dispersing force

Inactive Publication Date: 2018-01-26
戴琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved by the present invention: Aiming at the defect of low mechanical strength of current hydrogel, a preparation method of high-strength hydrogel is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Weigh 6g of montmorillonite and 10g of polyvinyl alcohol, mix and grind for 5min, pass through a 100-mesh sieve, collect the sieved powder, add 80mL of deionized water and 2g of phenol to the sifted powder, mix them in a water bath, and heat at 75°C Shake for 1 hour to obtain a self-made dispersion, and set it aside. Add the silane coupling agent KH-570 to the above-mentioned self-made dispersion at a volume ratio of 1:10, and control the dropping time to 16 minutes. After the dropping is completed, stir and mix and pour In a petri dish, freeze at -18°C for 2 hours, and then thaw at 24°C for 1 hour. After 3 cycles of freezing and thawing, immediately spray and freeze with liquid nitrogen for 2 minutes. After spraying and freezing, put it in an oven. After drying at 85°C for 1 hour, the dried mixture was obtained. Place the dried mixture in 100mL of deionized water, mix and stir at 25°C for 1 hour to obtain a self-made hydrogel body, weigh 8g of quartz sand, grind and pul...

example 2

[0025]Weigh 7g of montmorillonite and 13g of polyvinyl alcohol, mix and grind for 6 minutes, pass through a 100-mesh sieve, collect the sieved powder, add 90mL of deionized water and 3g of phenol to the sifted powder, mix them in a water bath, and heat at 85°C Shake for 2 hours to get a self-made dispersion, set aside, add the silane coupling agent KH-570 to the above-mentioned self-made dispersion at a volume ratio of 1:10, control the dropping time for 20 minutes, stir and mix after the dropping is completed, and pour it into the In the petri dish, freeze at -14°C for 3 hours, and then thaw at 30°C for 2 hours. After 4 cycles of freezing and thawing, immediately spray and freeze with liquid nitrogen for 3 minutes, and put it in an oven after spraying and freezing. After drying at 87°C for 1.5h, the dried mixture was obtained. Place the above-mentioned dried mixture in 110mL of deionized water, and mix and stir at 27°C for 1.5h to obtain a self-made hydrogel body. Weigh 9g of ...

example 3

[0027] Weigh 8g of montmorillonite and 16g of polyvinyl alcohol, mix and grind for 7 minutes, pass through a 100-mesh sieve, collect the sieved powder, add 100mL of deionized water and 4g of phenol to the sifted powder, mix them in a water bath, and heat at 95°C Shake for 3 hours to get the self-made dispersion liquid, set aside, add the silane coupling agent KH-570 to the above-mentioned self-made dispersion liquid at a volume ratio of 1:10, control the dropping time for 24 minutes, stir and mix after the dropping is completed, and pour it into the In a petri dish, freeze at -10°C for 4 hours, and then thaw at 36°C for 3 hours. After 5 cycles of freezing and thawing, immediately spray and freeze with liquid nitrogen for 4 minutes, put it in an oven after spraying and freezing. After drying at 90°C for 2 hours, the dried mixture was obtained. Place the above dried mixture in 120mL deionized water, mix and stir at 30°C for 2 hours to obtain a self-made hydrogel body, weigh 10g o...

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Abstract

The invention relates to the technical field of hydrogel and in particular relates to a method for preparing high-strength hydrogel. The method disclosed by the invention comprises the following steps: modifying the surface of montmorillonoid and polyvinyl alcohol by virtue of a silane coupling agent, forming a silanol group and carrying out a hydroxylation reaction; finally forming a polymolecular cover film on the surface of montmorillonoid and polyvinyl alcohol by the silane coupling agent, enabling phenol to enter the montmorillonoid and polyvinyl alcohol particle layer and carrying out apolymerization reaction, so that the interior of the hydrogel is effectively filled; performing cycle freezing and liquid nitrogen spray freezing for three times, so that the mechanical strength of the hydrogel is improved; and introducing 2-acrylamido-2-methyl propane-sulfonic acid, N,N-methylenebis acrylamide, methyl benzoylformate, gelatin, nano-fibers, modified quartz sand powder and deionizedwater mixture. By utilizing excellent mechanical properties of the gelatin, nano-fibers and modified quartz sand powder, the acting force is effectively dispersed, the mechanical strength of the hydrogel is further improved, and the high-strength hydrogel has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of hydrogel, in particular to a preparation method of high-strength hydrogel. Background technique [0002] Gels can be seen everywhere in our daily life, such as jelly, agar, toothpaste, contact lenses, gel pens, hairspray and other cosmetics, etc. Among them, hydrogels are the most common. Hydrogels use water as the dispersion medium gel , is a hydrophilic but water-insoluble polymer. It has a unique three-dimensional hydrophilic polymer network structure, which contains pure water as a dispersion medium, and it is highly absorbent, capable of absorbing a large amount of water, soft in nature, and thus has a flexibility similar to natural tissue. Hydrogels have good biocompatibility and certain stimuli responsiveness, and have attracted extensive attention from scientists, engineers, and business people in recent decades. Hydrogel is a rapidly developing functional polymer material, which has a wide ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08J7/04C09D4/06C09D4/02C09D7/62C09D7/63C08L29/04C08K9/06C08K3/34
Inventor 戴琪杨立军张淑娴
Owner 戴琪
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