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Preparation method of photopolymerization hydrogel

A hydrogel and photopolymerization technology, applied in the field of organic synthesis, can solve problems such as poor mechanical properties of hydrogels, and achieve the effects of low price, low energy consumption, and large reserves

Pending Publication Date: 2022-07-29
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the existing hydrogel has poor mechanical properties and is difficult to polymerize in situ at the application site due to the need for heating polymerization, and provides a preparation method for photopolymerizable hydrogel

Method used

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  • Preparation method of photopolymerization hydrogel
  • Preparation method of photopolymerization hydrogel
  • Preparation method of photopolymerization hydrogel

Examples

Experimental program
Comparison scheme
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specific Embodiment approach 1

[0030] Embodiment 1: The preparation method of the photopolymerized hydrogel in this embodiment is as follows:

[0031] 1. Add 81 mL of acrylic acid, 84 mg of polyethylene glycol diacrylate and 4.2 g of ammonium persulfate to 300 mL of deionized water, stir to form a uniform solution, add 8.4 g of pectin, and stir with a magnetic stirrer at a speed of 600 rpm in the dark 12h-14h until the pectin dissolves to obtain a hydrogel base liquid;

[0032] 2. Dissolve 10-50mg of alkali lignin in 0.3mL of sodium hydroxide solution with a concentration of 0.15g / L, ultrasonicate for 1min, add 15mL of hydrogel base solution, and then use a xenon light source at a light intensity of 150mv / cm 2 Under certain conditions, irradiate for 30-50 min, and illuminate until the solution forms a uniform and non-flowing colloid, that is, a photopolymerized hydrogel is obtained.

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic frequency in step 2 is 40 kHz. Others are the same as the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, 30 mg of alkali lignin is taken and dissolved in 0.3 mL of sodium hydroxide solution with a concentration of 0.15 g / L. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of photopolymerization hydrogel, belongs to the field of organic synthesis, and relates to a preparation method of hydrogel. The invention aims to solve the technical problems that the existing hydrogel has poor mechanical properties and is difficult to polymerize in situ on an application site due to the need of heating polymerization. The method comprises the following steps: 1, preparing a hydrogel base solution; and 2, dissolving 10-50 mg of alkali lignin in 0.3 mL of a sodium hydroxide solution with the concentration of 0.15 g / L, carrying out ultrasonic treatment for 1 min, adding 15 mL of the hydrogel base solution, and irradiating for 30-50 min by adopting a xenon lamp light source under the condition that the light intensity is 150 mV / cm < 2 > until the solution forms a uniform and non-flowing colloid, thereby obtaining the photopolymerization hydrogel. The photopolymerization hydrogel prepared by the invention can be stretched to 14.21 times of the initial length. The breaking energy of the photopolymerization hydrogel prepared by the preparation method disclosed by the invention can reach 770.22 N / m. The prepared photopolymerization hydrogel is soaked in a hydrogen peroxide solution with the mass concentration of 10%, the peel strength can reach 26.3 N / m, and the peel strength after oxidation can reach 17.7 N / m.

Description

technical field [0001] The invention belongs to the field of organic synthesis, in particular to a preparation method of a hydrogel. Background technique [0002] Lignin is a complex, non-crystalline, three-dimensional network phenolic polymer, which widely exists in higher plant cells and is one of the basic chemical components of conifers, broad-leaved trees and grasses. In plants, lignin forms a supramolecular system together with cellulose and hemicellulose. Lignin acts as a binder for cellulose to enhance the mechanical strength of plants. Lignin is a biopolymer with a three-dimensional network structure formed by the interconnection of three phenylpropane units through ether bonds and carbon-carbon bonds. It contains abundant aromatic ring structures, aliphatic and aromatic hydroxyl groups, and quinone groups. . [0003] Hydrogel is a kind of cross-linked polymer that contains a lot of water and is insoluble in water. Because of its good water retention, biocompatibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L5/06C08L97/00C08L33/02C08F220/06C08F222/20C08F2/48
CPCC08J3/075C08F220/06C08F2/48C08J2497/00C08J2305/06C08J2433/02C08F222/1063
Inventor 李淑君张惜慈张力丹唐东涛马振钧丁莹萤
Owner NORTHEAST FORESTRY UNIVERSITY
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