Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of double network hydrogel and its preparation method and application

A hydrogel, dual network technology, applied in prosthesis, medical science and other directions, can solve the problems of low mechanical properties, uneven cross-linking structure, low cross-linking point density, etc., and achieve excellent high-strength performance and excellent self-healing. performance effect

Active Publication Date: 2021-04-23
GUANGDONG OCEAN UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional hydrogel synthesis methods mainly use acrylic acid and acrylamide as raw materials. Due to the low density of cross-linking points and uneven cross-linking structure, the hydrogel of a single material has low tensile and compressive strength after absorbing water. Low mechanical properties, so it will be subject to certain limitations in application
In order to increase the cross-linking strength and toughness of the hydrogel material and improve its self-healing performance, the prior art CN108341973A discloses a preparation method of a high-strength ion-responsive lubricating hydrogel, but this method mainly regulates the hydrogel material body Phase and surface ion species and charged state to achieve ion response function, the mechanical properties are mainly the improvement of lubricating properties, and the improvement of the overall self-healing properties and high strength and toughness of the hydrogel is not significant

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of double network hydrogel and its preparation method and application
  • A kind of double network hydrogel and its preparation method and application
  • A kind of double network hydrogel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A double network hydrogel, the hydrogel is composed of a first network and a second network, wherein the first network is a cross-linked network between polyvinyl alcohol and borax, and the second network is poly(acrylic acid-copolymerization-propylene amide) and the cross-linked network between iron ions, the mass ratio of the first network and the second network is 1:5, and the water content is about 50%.

[0048] The preparation method of double network hydrogel is as follows:

[0049] S1. Prepare the first network: add polyvinyl alcohol into the borax solution, stir and crosslink to obtain the first network crosslinked between polyvinyl alcohol and borax, and the mass ratio of borax to polyvinyl alcohol is 1:8;

[0050] S2. Preparation of the second network: add acrylic acid, acrylamide and iron ion solution to the first network solution prepared in S1 and mix evenly, then add ammonium persulfate, mix evenly, keep the temperature at 40°C for 4h, and keep it at -50°C...

Embodiment 2

[0052] A double network hydrogel, the hydrogel is composed of a first network and a second network, wherein the first network is a cross-linked network between polyvinyl alcohol and borax, and the second network is poly(acrylic acid-copolymerization-propylene amide) and the cross-linked network between iron ions, the mass ratio of the first network and the second network is 1:5, and the water content is about 70%.

[0053] The preparation method of double network hydrogel is as follows:

[0054] S1. Prepare the first network: add polyvinyl alcohol into the borax solution, stir and crosslink to obtain the first network crosslinked between polyvinyl alcohol and borax, and the mass ratio of borax to polyvinyl alcohol is 1:8;

[0055] S2. Preparation of the second network: add acrylic acid, acrylamide and iron ion solution to the first network solution prepared in S1 and mix evenly, then add ammonium persulfate, mix evenly, keep the temperature at 40°C for 4h, and put it at -20°C ...

Embodiment 3

[0057] A double network hydrogel, the hydrogel is composed of a first network and a second network, wherein the first network is a cross-linked network between polyvinyl alcohol and borax, and the second network is poly(acrylic acid-copolymerization-propylene amide) and the cross-linked network between iron ions, the mass ratio of the first network and the second network is 1:5, and the water content is about 70%.

[0058] The preparation method of double network hydrogel is as follows:

[0059] S1. Prepare the first network: add polyvinyl alcohol into the borax solution, stir and crosslink to obtain the first network crosslinked between polyvinyl alcohol and borax, and the mass ratio of borax to polyvinyl alcohol is 1:8;

[0060] S2. Preparation of the second network: add acrylic acid, acrylamide and iron ion solution to the first network solution prepared in S1 and mix evenly, then add ammonium persulfate, mix evenly, keep the temperature at 40°C for 4h, and put it at -20°C ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile stressaaaaaaaaaa
compressive strengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a double network hydrogel, its preparation method and application. The hydrogel is composed of a first network and a second network, wherein the first network is formed by cross-linking polyvinyl alcohol and borax, and the second network is formed by cross-linking poly(acrylic acid-co-acrylamide) and iron ions. The first network and the second network are interspersed with each other. The present invention constructs the first network of polyvinyl alcohol by reacting the hydroxyl group of polyvinyl alcohol with borax, and the carboxyl anion on the poly(acrylic acid-co-acrylamide) molecular chain formed by the copolymerization of acrylic acid and acrylamide and Fe 3+ The formed ionic bond and the hydrogen bond formed between the amide group and the carboxyl group construct the second network. The hydrogel has excellent self-healing performance, high strength and high toughness, and can be applied in the field of tissue engineering.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a double network hydrogel and its preparation method and application. Background technique [0002] Hydrogel is a polymer material with a three-dimensional network structure formed by chemical cross-linking or physical cross-linking. Hydrogel polymer materials can absorb a large amount of water but are insoluble in water, and have a strong water retention capacity. There are many similarities, so it is widely used in the field of biomedicine, and has great application prospects in the fields of tissue engineering and regenerative medicine. However, traditional hydrogel synthesis methods mainly use acrylic acid and acrylamide as raw materials. Due to the low density of cross-linking points and uneven cross-linking structure, the hydrogel of a single material has low tensile and compressive strength after absorbing water. Low mechanical properties, so it will...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/02C08L33/26C08L29/04C08K3/38C08K3/00C08J3/24C08J3/075C08F220/06C08F220/56A61L27/02A61L27/04A61L27/16A61L27/50A61L27/52
CPCA61L27/025A61L27/042A61L27/16A61L27/50A61L27/52C08F220/06C08F220/56C08J3/075C08J3/243C08J3/246C08J2333/26C08J2429/04C08K3/00C08K2003/387C08L29/04C08L33/26
Inventor 景占鑫徐爱星李泳洪鹏志张兆霞余传明
Owner GUANGDONG OCEAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com