High-strength high-toughness antimicrobial polyvinyl alcohol hydrogel and preparation method thereof

A polyvinyl alcohol, high toughness technology, applied in the field of polyvinyl alcohol hydrogel and its preparation, to achieve the effects of high tensile strength, good antibacterial properties, and enhanced action force

Inactive Publication Date: 2018-08-14
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tea polyphenols are a class of natural high-efficiency antioxidants, UV absorbers, and have broad-spectrum, antibacterial and disinfecting properties. It has been reported that polyphenols are added to polyurethane (J. Appl. Polym. Sci., 2003, 90 : 2756-2763) phenolic resin (J. Appl. Polym. Sci., 2001, 8l: 1567-1571) endows it with antibacterial and deodorizing functions, and tea polyphenols are added to polyvinyl alcohol solution to prepare high-strength, Hydrogel materials with high toughness and antibacterial function have not been reported so far

Method used

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  • High-strength high-toughness antimicrobial polyvinyl alcohol hydrogel and preparation method thereof
  • High-strength high-toughness antimicrobial polyvinyl alcohol hydrogel and preparation method thereof
  • High-strength high-toughness antimicrobial polyvinyl alcohol hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel is prepared from polyvinyl alcohol and tea polyphenols, and the mass ratio of polyvinyl alcohol to tea polyphenols is 15:5.

[0032] The preparation method of the above-mentioned high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel comprises the steps of:

[0033] (1) Disperse 20.0 g of polyvinyl alcohol (PVA) in 80.0 g of deionized water, heat to 95°C and stir for 2 hours to prepare a high-viscosity, homogeneous 20% polyvinyl alcohol aqueous solution;

[0034] (2) Add 6.7 g tea polyphenols (TP) and 26.3 g deionized water to the above polyvinyl alcohol aqueous solution, and stir at 90°C for 30 minutes, then let it stand for 10 minutes to remove air bubbles, and prepare tea polyphenols / polyvinyl alcohol mixed liquid, the massfraction of polyvinyl alcohol in the mixed liquor is 15%, and the massfraction of tea polyphenols is 5%;

[0035] (3) Transfer the above mixture to a pa...

Embodiment 2

[0037] A high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel is prepared from polyvinyl alcohol and tea polyphenols, and the mass ratio of polyvinyl alcohol to tea polyphenols is 15:3.

[0038] The preparation method of the above-mentioned high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel comprises the steps of:

[0039] (1) Referring to Example 1, 100.0 g of polyvinyl alcohol aqueous solution with a mass fraction of 20% was prepared;

[0040] (2) Add 4.0g tea polyphenols and 29.0g deionized water to the above aqueous solution, and stir at 90°C for 30 minutes, then let it stand for 10 minutes to remove air bubbles, and prepare a tea polyphenol / polyvinyl alcohol mixed solution. The mass fraction of vinyl alcohol is 15%, and the mass fraction of tea polyphenols is 3%;

[0041] (3) Transfer the above mixture to a parallel glass plate mold, let it stand at room temperature for 2 hours, transfer it to -18°C and freeze it for 12 hours, ...

Embodiment 3

[0043] A high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel is prepared from polyvinyl alcohol and tea polyphenols, and the mass ratio of polyvinyl alcohol to tea polyphenols is 15:1.

[0044] The preparation method of the above-mentioned high-strength and high-toughness antibacterial polyvinyl alcohol hydrogel comprises the steps of:

[0045] (1) Referring to Example 1, 100.0 g of polyvinyl alcohol aqueous solution with a mass fraction of 20% was prepared;

[0046] (2) Add 1.3g tea polyphenols and 32.0g deionized water to the above aqueous solution, stir at 90°C for 30min, then let it stand for 10min to remove air bubbles, and prepare tea polyphenol / polyvinyl alcohol mixed solution, polyvinyl alcohol mixed solution in the mixed solution The mass fraction of vinyl alcohol is 15%, and the mass fraction of tea polyphenols is 1%;

[0047](3) Transfer the above mixture to a parallel glass plate mold, let it stand at room temperature for 2 hours, transfer it...

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Abstract

The invention belongs to the field of functionalized new materials, and particularly discloses high-strength high-toughness antimicrobial polyvinyl alcohol hydrogel, prepared from polyvinyl alcohol and tea polyphenol. The invention also discloses a preparation method of the hydrogel, comprising the following steps: (1) adding polyvinyl alcohol into water to prepare suspension liquid, stirring andincreasing the temperature to 95 DEG C or above to obtain a polyvinyl alcohol water solution; (2) adding the tea polyphenol in the polyvinyl alcohol water solution, and stirring at 90 DEG C or above to obtain mixed liquor of the tea polyphenol and polyvinyl alcohol; (3) transferring the mixed liquor into a die, forming at room temperature, freezing at 0 DEG C or below, and then unfreezing at roomtemperature, wherein a freezing-unfreezing cyclic process is a freezing and thawing circulation; (4) repeating the freezing and thawing circulation. The maximum tensile strength and the maximum elongation at break of the prepared hydrogel are respectively 2.7 times and 2.5 times of those of polyvinyl alcohol hydrogel in which the tea polyphenol is not added, and good antibacterial property is shown.

Description

technical field [0001] The invention belongs to the field of new functional materials, and in particular relates to a high-strength, high-toughness antibacterial polyvinyl alcohol hydrogel and a preparation method thereof. Background technique [0002] Polymer hydrogel is a new type of soft-wet composite material with a three-dimensional network structure formed by physical or chemical cross-linking of polymer segments, which can store a large amount of water solvent and has a certain mechanical strength. Compared with traditional rigid materials, polymer hydrogels have certain deformation properties, can respond to external stimuli, and have shape memory functions, so they have a wide range of applications in industry, agriculture, tissue engineering, and biomedical materials. Applications. Since such hydrogels contain a large amount of water, resulting in poor mechanical properties, the development of polymer hydrogels with higher strength and toughness is still a hot res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L29/04
CPCC08J3/075C08J3/24C08J2329/04
Inventor 雷廷宙张修强任素霞张艳彩吴清林董莉莉李自杰何晓峰吴艺峰
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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