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A method for preparing high-strength hydrogel based on the principle of leather tanning

A hydrogel and high-strength technology is applied in the field of preparing high-strength hydrogels based on the principle of tanning and tanning, and can solve the problems of complex synthesis methods, high cost, difficulty in mass preparation, etc., and achieves simple preparation process, easy operation, The effect of promoting even immersion

Active Publication Date: 2022-04-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such high-strength hydrogels have problems such as complex synthesis methods, high cost, and difficulty in mass production, which limit their popularization to a certain extent.

Method used

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  • A method for preparing high-strength hydrogel based on the principle of leather tanning

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, preparation of PVA-PAA-based hydrogel precursor

[0033] Step 101. Dissolve 5 parts of polyvinyl alcohol in 116.5 parts of deionized water in parts by mass, then raise the temperature to 60°C and stir for 1.5 hours, then cool to 20°C to obtain a clear and transparent PVA aqueous solution; the polyvinyl alcohol Molecular weight M w =205,000;

[0034]Step 102: Add 50 parts by mass of acrylic acid monomer and 0.25 parts of 2,4-dihydroxybenzophenone to the PVA aqueous solution obtained in Step 101, and then stir at 20°C for 16 minutes to obtain PVA - AA mixture;

[0035] Step 103. Put the PVA-AA mixture obtained in step 102 under vacuum for 15 minutes, then pour it into a glass mold, and perform ultraviolet curing to polymerize the acrylic acid monomer to obtain a PVA-PAA-based hydrogel precursor The size of the glass mold is 10cm×10cm (length×width); the UV light used in the UV curing has a wavelength of 365nm, a power of 40W, a temperature of 20°C, and a time o...

Embodiment 2

[0051] Step 1, preparation of PVA-PAA-based hydrogel precursor

[0052] Step 101. Dissolve 1 part of polyvinyl alcohol in 23.3 parts of deionized water in parts by mass, then raise the temperature to 90°C and stir for 1 hour, then cool to 22°C to obtain a clear and transparent PVA aqueous solution; the molecular weight of the polyvinyl alcohol m w =205,000;

[0053] Step 102: Add 9 parts by mass of acrylic acid monomer and 0.045 parts of α-ketoglutaric acid to the PVA aqueous solution obtained in Step 101, and then stir at 22°C for 10 minutes to obtain a PVA-AA mixed solution ;

[0054] Step 103. Put the PVA-AA mixture obtained in step 102 under vacuum for 10 minutes, then pour it into a glass mold, and perform ultraviolet curing to polymerize the acrylic acid monomer to obtain a PVA-PAA-based hydrogel precursor The size of the glass mold is 10cm×10cm (length×width); the UV light used in the UV curing has a wavelength of 365nm, a power of 40W, a temperature of 22°C, and a t...

Embodiment 3

[0060] Step 1, preparation of PVA-PAA-based hydrogel precursor

[0061] Step 101. Dissolve 10 parts of polyvinyl alcohol in 233 parts of deionized water in parts by mass, then raise the temperature to 70°C and stir for 2 hours, then cool to 25°C to obtain a clear and transparent PVA aqueous solution; the molecular weight of the polyvinyl alcohol m w =205,000;

[0062] Step 102: Add 90 parts by mass of acrylic acid monomer and 0.45 parts of α-hydroxyalkyl phenone to the PVA aqueous solution obtained in Step 101, and then stir at 25°C for 20 minutes to obtain a PVA-AA mixed liquid;

[0063] Step 103. Put the PVA-AA mixture obtained in step 102 under vacuum for 20 minutes, then pour it into a glass mold, and perform ultraviolet curing to polymerize the acrylic acid monomer to obtain a PVA-PAA-based hydrogel precursor The size of the glass mold is 10cm×10cm (length×width); the UV light used in the UV curing has a wavelength of 365nm, a power of 40W, a temperature of 25°C, and a...

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Abstract

The invention discloses a method for preparing high-strength hydrogel based on the principle of tanning and tanning. The method is based on a polyvinyl alcohol-polyacrylic acid (PVA-PAA)-based hydrogel precursor, using a tanning method for tanning and assisting The mechanical action of the drum effectively combines the PVA-PAA hydrogel with the metal ion complex, further improving the structural stability of the three-dimensional network of the PVA-PAA-based hydrogel, thereby greatly enhancing the mechanical strength of the gel system. The invention proposes for the first time that the leather tanning method is applied to the field of hydrogel synthesis, and opens up a new method for the synthesis of simple and feasible high-strength hydrogel structural materials.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a method for preparing high-strength hydrogel based on the principle of tanning and tanning. Background technique [0002] Hydrogel is a polymer material with a three-dimensional network structure formed by physical or chemical crosslinking. The polymer network contains a large amount of water and can maintain a certain shape. It is a special semi-solid material. As a flexible material, hydrogel has been widely used in the fields of flexible devices, biomedicine, tissue engineering and biomimetic engineering. However, traditional hydrogels suffer from low mechanical strength and poor toughness due to their inherent structural heterogeneity or insufficient effective energy dissipation mechanisms, which limit their application as structural materials in areas requiring high strength properties. Therefore, improving the mechanical strength of hydrogels has become an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L51/00C08K3/16C08F261/04C08F220/06C08F2/50
CPCC08J3/075C08F261/04C08F2/50C08J2351/00C08K3/16C08K2003/162C08F220/06
Inventor 陈咏梅张静雯官小玉李彦军董点点杨宽杨智炫王竟晓
Owner SHAANXI UNIV OF SCI & TECH
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