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Preparation method of anti-freezing organic-hydrogel with reversible adhesion and self-healing properties

A hydrogel and organic technology, which is applied in the field of antifreeze organic-hydrogel preparation, can solve the problems of long-term use of unfavorable gel materials, decreased transparency of gel materials, and decreased adhesion of hydrogels. The effect of large-scale industrial production, stable production performance and recovery of adhesion function

Active Publication Date: 2020-06-26
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this is a commonly used method, the functional groups in PDA are easily oxidized, resulting in a decrease in the adhesion of the hydrogel over time, which is not conducive to the long-term use of the gel material;
[0005] (3) The introduction of conductive fillers such as MXene, carbon nanotubes, and graphene in the composite gel will greatly reduce the transparency of the gel material, limiting its application in transparent electrodes and other fields

Method used

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  • Preparation method of anti-freezing organic-hydrogel with reversible adhesion and self-healing properties
  • Preparation method of anti-freezing organic-hydrogel with reversible adhesion and self-healing properties
  • Preparation method of anti-freezing organic-hydrogel with reversible adhesion and self-healing properties

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Embodiment 1

[0042] A method for preparing an organic / hydrogel with intrinsic reversible adhesion, ultra-long stretchability, transparency and conductivity, comprising the steps of:

[0043] Step 1) Preparation of polyvinyl alcohol (PVA) aqueous solution: Weigh 11.1g of PVA in a round bottom flask, add 100g of deionized water, seal and swell for 24h, then install a condensation device, heat and stir at 90°C for 2h to dissolve PVA, and obtain the concentration 10wt% PVA solution;

[0044] Step 2) preparation of PVA / monomer pregel solution: in the round bottom flask, adding 6mL concentration successively is the PVA aqueous solution of 10wt%, and 0.2mL concentration is the H of 10wt%. 2 SO 4 , 3.15g AA, 9mL glycerin, 2.82g Am, 0.6015g KCl, 0.05g α-ketoglutaric acid, 1mL concentration is 5wt% glutaraldehyde aqueous solution;

[0045] Step 3) UV light gelation of the pre-gel solution: add the uniformly mixed PVA / monomer pre-gel solution into the mold (tetrafluoroethylene plate, glass plate an...

Embodiment 2

[0047] A method for preparing an organic / hydrogel with intrinsic reversible adhesion, ultra-long stretchability, transparency and conductivity, comprising the steps of:

[0048] Step 1) Preparation of polyvinyl alcohol (PVA) aqueous solution: Weigh a certain amount of 5.3g of PVA in a round bottom flask, add 100g of deionized water, seal and swell for 24h, then install a condensation device, heat and stir at 90°C for 2h to dissolve the PVA, Obtaining concentration is the PVA solution of 5wt%;

[0049] Step 2) preparation of PVA / monomer pregel solution: in the round bottom flask, adding 6mL concentration successively is the PVA aqueous solution of 5wt%, and 0.2mL concentration is the H of 10wt%. 2 SO 4, 3.16g AA, 9mL glycerin, 2.82g Am, 0.6015g KCl, 0.05g α-ketoglutaric acid, 1mL concentration is 5wt% glutaraldehyde aqueous solution;

[0050] Step 3) UV light gelation of the pre-gel solution: add the uniformly mixed PVA / monomer pre-gel solution into the mold (tetrafluoroethyl...

Embodiment 3

[0055] A method for preparing an organic / hydrogel with intrinsic reversible adhesion, ultra-long stretchability, transparency and conductivity, comprising the steps of:

[0056] Step 1) Preparation of polyvinyl alcohol (PVA) aqueous solution: Weigh 11.1g of PVA in a round bottom flask, add 100g of deionized water, seal and swell for 24h, then install a condensation device, heat and stir at 90°C for 2h to dissolve PVA, and obtain the concentration 10wt% PVA solution;

[0057] Step 2) preparation of PVA / monomer pregel solution: in the round bottom flask, adding 6mL concentration successively is the PVA aqueous solution of 10wt%, and 0.2mL concentration is the H of 10wt%. 2 SO 4 , 3.15g AA, 9mL glycerin, 5.64g Am, 0.6015g KCl, 0.05g α-ketoglutaric acid, 1mL concentration is 5wt% glutaraldehyde aqueous solution;

[0058] Step 3) UV light gelation of the pre-gel solution: add the uniformly mixed PVA / monomer pre-gel solution into the mold (tetrafluoroethylene plate, glass plate an...

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Abstract

The invention discloses a preparation method of an anti-freezing organic-hydrogel with reversible adhesion and self-healing properties. The prepared organic hydrogel has the properties of reversible adhesion, high stretchability, self-healing, high moisture retention, freezing resistance, transparency and the like, and the preparation process is simple, the raw material cost is low, the preparation efficiency is high, and the method is suitable for industrial production. The anti-freezing organic-hydrogel has potential application prospects in the aspects of reversible adhesion devices, flexible electronic devices, supercapacitors, transparent electrodes and the like. The preparation process adopted by the invention comprises the following steps: (1) preparing a polyvinyl alcohol (PVA) solution; (2) preparing a PVA / monomer pre-gel solution; and (3) carrying out ultraviolet irradiation gelatinization on the pre-gel solution.

Description

technical field [0001] The invention relates to the technical field of preparation of reversible adhesion high-performance gel materials, in particular to a method for preparing an antifreeze organic-hydrogel with reversible adhesion and self-healing properties. Background technique [0002] Hydrogel is a kind of polymer material with unique soft and wet properties composed of cross-linked polymer network and water. It has broad application prospects in biomedicine, beauty, flexible electronic devices and other fields. But hydrogels present significant problems during use. There are: [0003] (1) The volatilization and freezing of water in the hydrogel network will cause the gel to lose its flexibility and conductivity; [0004] (2) The existing adhesive hydrogel construction method is mainly to introduce polydopamine (PDA) component into the hydrogel component. Although this is a commonly used method, the functional groups in PDA are easily oxidized, resulting in a decre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F220/06C08F220/56C08F2/48C08K3/16C08K5/053
CPCC08J3/075C08F220/06C08F2/48C08J2329/04C08J2433/06C08J2333/06C08J2429/04C08K13/02C08K3/16C08K5/07C08K5/053C08F220/56
Inventor 周宏伟赖佳亮金洗郎陈卫星
Owner XIAN TECH UNIV
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