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Preparation method and application of high-strength oriented polyvinyl alcohol hydrogel

A technology of polyvinyl alcohol and polyvinyl alcohol powder, which is applied in medical science, tissue regeneration, prosthesis, etc., can solve the problems of single function, lack of biological function, difficulty in bearing load, etc., achieve simple preparation method and ensure biocompatibility sexual effect

Active Publication Date: 2019-09-13
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology involves combining different techniques like cold weather cycle, directionality stretching, and Hydrogen Bond Effector(HBPE), which are used together to make strong polymers that have good flexibility without containing any chemical substances. These new types of plastic also provide various benefits including being nontoxic, safe from environmental concerns, easy to manufacture, and having excellent physical characteristics.

Problems solved by technology

This patented technical problem addressed in this patent relates to creation of strong yet flexible plasma membrana gel called hyperbranched polyelectrolyte microsponge(HMPMMS) because they provide better physical support than current types like collagen gels while maintaining their superior characteristics over conventional ones.

Method used

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  • Preparation method and application of high-strength oriented polyvinyl alcohol hydrogel
  • Preparation method and application of high-strength oriented polyvinyl alcohol hydrogel
  • Preparation method and application of high-strength oriented polyvinyl alcohol hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of conventional polyvinyl alcohol (PVA) hydrogels.

[0049] Weigh 1 g of PVA powder and dissolve it in 9 mL of deionized water, dissolve at 90 °C for 6 h to form a uniform 10 wt% PVA solution, let it stand overnight, and quickly transfer it to the mold after deoxidizing in a vacuum box. After standing at -20 °C for 8 h, transfer to 25 °C for 4 h, and cycle 3 times continuously to obtain traditional physical cross-linked polyvinyl alcohol (PVA) hydrogel I.

[0050] The test method of gel mechanical properties is as follows:

[0051] The HZ-1003B-10Kg electronic tensile machine of Dongguan Lixian Instrument Technology Co., Ltd. was used to perform a tensile test on the obtained polymer hydrogel. The size of the tensile specimen is 50 mm × 10 mm × 1.5 mm, and the tensile strength is calculated based on the initial cross-sectional area. The stretching speed was 100 mm / min. The toughness is calculated by the integral area of ​​the stress-strain curve, and the ...

Embodiment 2

[0057] Preparation of high-strength PVA-x-AS hydrogels.

[0058] 1) The polyvinyl alcohol (PVA) hydrogel prepared in Example 1 was pre-stretched at 0%, 25%, 50%, 75% and 100%, and freeze-dried at -20°C for 70 h to remove the contained water to obtain an orientation Type II polyvinyl alcohol (PVA) airgel.

[0059] 2) Soak the above-mentioned polyvinyl alcohol (PVA) airgel II in a 30% aluminum sulfate (AS) aqueous solution for 4 hours to obtain a series of high-strength PVA-x-AS hydrogels (where x is the pre-treatment value of PVA). stretching ratio).

[0060] According to the gel mechanical property testing method in embodiment 1, gained PVA-x-AS series hydrogel is tested, and test result is:

[0061] PVA-0-AS hydrogel: tensile strength is 22.93MPa, elongation at break is 472.85%;

[0062] PVA-25-AS hydrogel: the tensile strength is 25.79 MPa, and the elongation at break is 442.89%;

[0063] PVA-50-AS hydrogel: tensile strength is 31.67MPa, elongation at break is 310.86%; ...

Embodiment 3

[0068] Preparation of high-strength PVA-AS-y hydrogels.

[0069] 1) The polyvinyl alcohol (PVA) hydrogel prepared in Example 1 was pre-stretched to 100%, and freeze-dried at -35 °C for 48 hours to remove the contained water to prepare the oriented polyvinyl alcohol (PVA) airgel II.

[0070] 2) Soak the above polyvinyl alcohol (PVA) airgel II in 0%, 10%, 20%, 30% aluminum sulfate (AS) aqueous solution for 4 hours to obtain high-strength PVA-AS-y series water Gel (where y is the mass fraction of aluminum sulfate).

[0071] According to the gel mechanical property testing method in embodiment 1, gained PVA-AS-y series hydrogel is tested, and test result is:

[0072] PVA-AS-0 hydrogel: the tensile strength is 1.72MPa, and the elongation at break is 177.75%;

[0073] PVA-AS-10 hydrogel: tensile strength is 15.75MPa, elongation at break is 377.93%;

[0074] PVA-AS-20 hydrogel: tensile strength is 19.52MPa, elongation at break is 314.72%;

[0075] PVA-AS-30 hydrogel: tensile stre...

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Abstract

The invention belongs to the technical field of intelligent high-molecular materials, and relates to a preparation method and an application of a high-strength oriented polyvinyl alcohol hydrogel. Thepreparation method of the high-strength oriented polyvinyl alcohol hydrogel comprises the following steps: adding deionized water to dissolve polyvinyl alcohol powder, carrying out freeze-thawing circulation, pre-stretching orientation and freeze drying to obtain a polyvinyl alcohol aerogel, and immersing the obtained polyvinyl alcohol aerogel in an aqueous solution of a salt having a Hofmann effect or an aqueous solution of a salt capable of forming a coordinate bond or an aqueous solution of a polycarboxy compound capable of forming a hydrogen bond with polyvinyl alcohol to prepare the high-strength oriented polyvinyl alcohol hydrogel. The high-strength oriented polyvinyl alcohol hydrogel has a tensile strength reaching up to 41.0 MPa, an elongation at break reaching up to 228.0% and atoughness reaching up to 49.94 MJ/m<3>, also has antibacterial and anticorrosive effects and a free radical scavenging effect, and is of great significance to broaden the application of the polyvinylalcohol hydrogel in artificial muscles and cartilages, tissue engineering and other biomedical materials.

Description

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Claims

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Application Information

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Owner BEIFANG UNIV OF NATITIES
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