High-transparency polyvinyl alcohol hydrogel as well as preparation method and application thereof

A polyvinyl alcohol and hydrogel technology, which is used in pharmaceutical formulations, medical preparations with non-active ingredients, prostheses, etc., can solve the problems of difficult promotion and application, inconvenient operation of irradiation cross-linking, and high price. The effect of easy implementation and promotion, green environmental protection implementation and promotion, and simple raw materials

Active Publication Date: 2021-04-13
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, irradiation cross-linking is inconvenient and expensive, and it is not easy to promote and apply

Method used

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  • High-transparency polyvinyl alcohol hydrogel as well as preparation method and application thereof
  • High-transparency polyvinyl alcohol hydrogel as well as preparation method and application thereof
  • High-transparency polyvinyl alcohol hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A mixed solution of 20wt% polyvinyl alcohol (M=70000) / 20wt% calcium chloride is prepared at a high temperature, mixed evenly, and ultrasonically defoamed. The resulting mixed solution is added to a mold and put into a refrigerator for freezing. The freezing temperature is -50°C. Freeze for 24 hours, thaw at 4°C for 6 hours, and the number of freeze-thaw cycles is 1. After testing, the visible light transmittance of the prepared polyvinyl alcohol hydrogel is 91%, and the minimum freezing temperature is -25°C. Its transparency is shown as figure 1 As shown, the tensile recovery properties are as image 3 As shown, the sensing performance is as Figure 4 shown.

Embodiment 2

[0044] Prepare a solution of polyvinyl alcohol (M=140000) with a concentration of 10wt% at high temperature, continue to add 20wt% calcium chloride, mix well, and ultrasonically defoam, add the resulting mixed solution to the mold, and put it in the refrigerator to freeze at -40°C , the freezing time is 24h, thawing at 4°C for 6h, and the number of freeze-thaw cycles is 2. After testing, the visible light transmittance of the prepared polyvinyl alcohol hydrogel is 90%, and the minimum antifreeze temperature is -25°C. Its stretch recovery performance and sensing performance are similar to those of the polyvinyl alcohol hydrogel in Example 1.

Embodiment 3

[0046] Prepare a solution of polyvinyl alcohol (M=70000) with a concentration of 10wt% at high temperature, mix it evenly, and defoam it ultrasonically. Thaw for 6 hours, and the number of freeze-thaw cycles is 3. After testing, the visible light transmittance of the prepared polyvinyl alcohol hydrogel is 92%, and the minimum freezing temperature is -80°C. Its sensing performance is close to that of the polyvinyl alcohol hydrogel in Example 1, but its stretch recovery performance is not as good as that of Example 1.

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Abstract

The invention provides high-transparency polyvinyl alcohol hydrogel as well as a preparation method and application thereof. According to the high-transparency polyvinyl alcohol hydrogel, polyvinyl alcohol and inorganic salt are used as raw materials, water is used as a solvent, the concentration of the polyvinyl alcohol is 3-30 wt%, and the concentration of the inorganic salt is 0.5-29.9 wt%. The method disclosed by the invention is green and environment-friendly, and the prepared polyvinyl alcohol hydrogel has high transparency, adhesion and ultralow-temperature freezing resistance, and has elasticity, ductility, ionic conductivity and moisture retention, so that the problems of non-transparency, no adhesion, no freezing resistance and the like of the polyvinyl alcohol hydrogel during application are solved, and the prepared polyvinyl alcohol hydrogel can be applied to the fields of medicines, materials and sensors.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a highly transparent polyvinyl alcohol hydrogel and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Polyvinyl alcohol is a water-soluble polymer with the advantages of biodegradability and biocompatibility, and is a green chemical material. Polyvinyl alcohol can be prepared into polyethyl alcohol hydrogel by physical or chemical cross-linking methods. Due to its non-toxicity and excellent mechanical properties, polyvinyl alcohol hydrogel has important application prospects in the fields of artificial cartilage, composition engineering sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08K3/16C08J5/18C08J9/28A61K9/06A61K47/32A61L26/00A61L27/16A61L27/50A61L27/52A61L27/60
CPCC08J3/075C08J5/18C08J9/286A61L26/0014A61L26/008A61L26/0061A61L27/16A61L27/52A61L27/50A61L27/60A61K9/06A61K47/32C08J2329/04C08K2003/162C08K3/16C08J2201/0484C08J2205/026C08J2207/10C08J2207/12C08J2207/02A61L2430/06A61L2430/16C08L29/04
Inventor 王莉莉田心语赵现伟张宪胜耿存珍夏延致
Owner QINGDAO UNIV
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