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Preparation method of nanometer lignin hybridization dual-network composite water gel with high mechanical performance

A technology of nano-lignin and composite hydrogel, which is applied in chemical instruments and methods, colloid chemistry, colloid chemistry, etc., can solve the problems of long time consumption and large consumption of neutral second monomers, and achieve simple preparation steps and easy preparation The effect of short cycle and low cost

Inactive Publication Date: 2019-06-14
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this polymerization method are: the polymerization period is 1 to 2 days, which takes a long time, and due to swelling, a large amount of neutral second monomer is required, and the consumption of neutral second monomer is relatively large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 0.1–1 g of agar in 25 mL of water, stir well, heat the solution until the agar powder is completely miscible with water, then add 3–10 g of acrylamide and 0.1–1.5 g of hydroxyethyl cellulose to the above solution Mix the lignin, a little photoinitiator and a little lignin nanoparticle suspension evenly, place it at room temperature for a period of time until the solution is solidified, and then place it under a UV lamp for 50-60 minutes to polymerize.

Embodiment 2

[0028] Dissolve 0.1–1 g of agar in 25 mL of water, stir well, heat the solution until the agar powder is completely miscible with water, then add 3–10 g of acrylic acid, 0.1–1.5 g of hydroxyethyl cellulose to the above solution , a little photoinitiator and a little lignin nanoparticle suspension were mixed evenly, placed at room temperature for a period of time until the solution was solidified, and then placed under a UV lamp for 50-60 minutes of polymerization.

Embodiment 3

[0030] Dissolve 0.1–1 g of agar in 25 mL of water, stir well, heat the solution until the agar powder is completely miscible with water, then add 3–10 g of vinyl alcohol and 0.1–1.5 g of hydroxyethyl cellulose to the above solution Mix the lignin, a little photoinitiator and a little lignin nanoparticle suspension evenly, place it at room temperature for a period of time until the solution is solidified, and then place it under a UV lamp for 50-60 minutes to polymerize.

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PUM

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Abstract

The invention discloses a preparation method of nanometer lignin hybridization dual-network composite water gel with high mechanical performance. The preparation method mainly comprises the followingsteps of firstly dissolving agar into water; performing heating until agar powder is completely dissolved; then, adding water-soluble polymer monomers, water-soluble cellulose ether, a small amount ofphotoinitiators and a small amount of lignin nanoparticles into the agar solution; performing uniform mixing; putting the obtained solution at the room temperature for a period of time until the solution is cured; then, putting the solution under a UV lamp to be irradiated so as to trigger the polymerization. The water gel prepared by the method is characterized in that the sol-gel conversion characteristics of the agar are used; a first network structure of the gel is formed; the water-soluble polymer monomers form the second layer network structure; the characteristic of the multiplex mutual action of the water-soluble cellulose ether, the nanometer lignin and the water gel network is used; the water gel mechanical performance is improved; the method is an effective method for toughening and enhancing the water gel, and can be used for medicine carriers and human body tissue engineering.

Description

technical field [0001] The invention belongs to the technical field of hydrogel preparation, and in particular relates to a method for preparing a nano-lignin hybrid double-network composite hydrogel with high mechanical properties. Background technique [0002] Hydrogel refers to a kind of polymer material that can absorb and maintain a large amount of water but is insoluble in water and has a certain three-dimensional structure. It contains water-soluble polymers with a network structure, and there are hydrophobic groups and Hydrophilic groups combine with water molecules to connect water molecules inside the network, while hydrophobic groups swell with water to form a network structure that locks water molecules and keeps them at a certain water content. Due to the existence of the special three-dimensional network system of the hydrogel, it is soft in nature, can maintain a certain shape, and has a high water content. Therefore, it is widely used in drug carrier, tissue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F251/00C08F251/02C08F220/56C08F2/48B01J13/00
Inventor 沈丽钰陈莹陈诗燕盛秋月付帅
Owner NANJING UNIV OF POSTS & TELECOMM