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High-strength supramolecule electric-conduction hydrogel based on acryloyl glycinamide, and preparation method thereof

A technology of acryloyl glycinamide and conductive hydrogel, which is applied in the direction of additive processing to achieve the effects of simple preparation method, strong tensile and compressive properties, and good electrical conductivity

Inactive Publication Date: 2018-03-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still a challenge to prepare high-strength conductive hydrogels with high self-healing efficiency.

Method used

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  • High-strength supramolecule electric-conduction hydrogel based on acryloyl glycinamide, and preparation method thereof
  • High-strength supramolecule electric-conduction hydrogel based on acryloyl glycinamide, and preparation method thereof
  • High-strength supramolecule electric-conduction hydrogel based on acryloyl glycinamide, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Preparation of acryloyl glycinamide / 2-acrylamide-2-methylpropanesulfonic acid copolymer hydrogel

[0041] Dissolve 196 mg of acryloylglycinamide and 4 mg of 2-acrylamide-2-methylpropanesulfonic acid in 1000 μL of deionized water, then add 6 mg of ammonium persulfate and allow to dissolve, and finally add 6 μL of tetramethylethylenediamine . The mixture was injected into a closed mold and maintained for 24 hours to ensure sufficient initiation of polymerization. Then open the mold to take out the gel, soak it in neutral buffer solution PBS (pH=7.4) or deionized water to make it reach swelling equilibrium (for example soak for 7 days, change the water every 12h to reach swelling equilibrium). Acryloyl glycinamide is a monomer with a double amide bond in the side chain. When it is free radically copolymerized with 2-acrylamide-2-methylpropanesulfonic acid, it can use the double amide bond in the side chain to The synergy of hydrogen bonds forms physically cross...

Embodiment 2

[0043] Example 2 Preparation of doped acryloyl glycinamide / 2-acrylamide-2-methylpropanesulfonic acid copolymer hydrogel

[0044] Dissolve 196 mg of acryloyl glycinamide and 4 mg of 2-acrylamide-2-methylpropanesulfonic acid in 1,000 μL of deionized water, and then add 30 μL of poly(3,4-ethylenedioxythiophene)-poly(benzene ethylene sulfonic acid). Then 6 mg of ammonium persulfate was added and allowed to dissolve, and finally 6 μL of tetramethylethylenediamine was added. The mixture was injected into a closed mold and maintained for 24 hours to ensure sufficient initiation of polymerization. Then open the mold to take out the gel, soak it in neutral buffer solution PBS (pH=7.4) or deionized water to make it reach swelling equilibrium (for example soak for 7 days, change the water every 12h to reach swelling equilibrium). Acryloyl glycinamide is a monomer with a double amide bond in the side chain. When it is free radically copolymerized with 2-acrylamide-2-methylpropanesulfoni...

Embodiment 3

[0047] Embodiment 3 mechanical property test

[0048] The mechanical properties of the two hydrogels prepared above were tested by the following methods. The mechanical property test was carried out on an electronic universal testing machine (Jinan Times Co., Ltd.), and the hydrogel before the test reached a swelling equilibrium in a neutral PBS buffer solution (pH=7.4). The sample size of the tensile mechanical property test is 20mm×10mm, the thickness is 500μm, and the tensile rate is 50mm / min; the sample size of the compressive mechanical property test is a cylinder with a diameter of 10mm and a height of 8mm, and the compression rate is 10mm / min. The tensile and compressive strengths of the hydrogels before and after doping can reach the level of MPa; in addition, in order to express the mechanical properties more vividly, the two gels are stretched, compressed, entangled and knotted.

[0049] Change the shape of the prepared acryloyl glycinamide / 2-acrylamide-2-methylprop...

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Abstract

The invention discloses a high-strength supramolecule electric-conduction hydrogel based on acryloyl glycinamide, and a preparation method thereof. According to the present invention, a monomer acryloyl glycinamide and a monomer 2-acrylamide-2-methyl propane sulfonic acid are used as copolymerization monomers, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) is used as a blending component,free radical polymerization is performed by initiating the C-C double bond on the two monomers with an initiator, and a physically cross-linked hydrogel is formed through the synergetic effect of thehydrogen bonds between the bisamide bonds carried on the side chain of the acryloyl glycinamide, such that poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) is doped into the gel network structure. According to the present invention, the preparation method of the high-strength supramolecule electric-conduction hydrogel is simple due to the synergistic effect of the hydrogen bonds, and the obtained high-strength supramolecule electric-conduction hydrogel has strong tensile performance and strong compressive property, can achieve self-repairing and thermoplastic function at the high temperature, and further has good electrical conductivity and good biocompatibility.

Description

technical field [0001] The invention belongs to the direction of hydrogel in the field of biotechnology, and more specifically relates to a hydrogel with acryloyl glycinamide as a matrix and a preparation method thereof. Background technique [0002] Conductive hydrogel is a functional material formed by combining conductive polymer and hydrogel. It not only has the soft and wet characteristics of hydrogel, but also has conductive function. Therefore, conductive hydrogels have a wide range of applications in supercapacitors, fuel cells, lithium batteries, and biosensors. However, the mechanical properties of conductive hydrogels are poor, mainly reflected in the weak and brittle characteristics. In addition, in order to combine the conductive polymers of the hydrogel with each other, the preparation process of the conductive hydrogel is often complicated. Therefore, the above-mentioned problems greatly limit the application of conductive hydrogels in the fields of biomedic...

Claims

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Application Information

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IPC IPC(8): C08F222/38C08F220/58C08L35/00C08L87/00C08J3/075B33Y70/00
CPCB33Y70/00C08F222/38C08J3/075C08J2335/00C08J2487/00C08L35/00C08L87/00C08F220/585
Inventor 刘文广吴谦
Owner TIANJIN UNIV
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