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

A method to enhance the rigidity and self-healing properties of tough hydrogels

A hydrogel rigidity and hydrogel technology, which is applied in the chemical industry, can solve the problems of non-self-healing, insufficient rigidity and mechanical strength of tough gel, and achieve simple and convenient operation, improved rigidity and mechanical strength, and improved mechanical strength. Effect

Active Publication Date: 2020-04-28
SHENZHEN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the object of the present invention is to provide a method for improving the rigidity and self-healing properties of tough hydrogels, aiming at solving the problem of insufficient rigidity and mechanical strength of existing tough hydrogels, which cannot self-heal after fracture The problem

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 method to enhance the rigidity and self-healing properties of tough hydrogels
  • A method to enhance the rigidity and self-healing properties of tough hydrogels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Immerse the stretched bowl-shaped ductile hydrogel in Fe 3+ Concentration is the aqueous solution of 0.05mol / L, and stand for 50min, the flexible hydrogel stretched into the bowl shape becomes the very rigid bowl shape structure. Align the interface of two tough hydrogel fragments and apply 3 drops of Fe 3+ An aqueous solution with a concentration of 0.2 mol / L was applied to the interface and left to stand for 20s. The two tough hydrogel segments were successfully spliced ​​together. The total length after splicing and the sum of the lengths of the two tough hydrogel segments At the same time, the toughness of the spliced ​​flexible hydrogel is very good, stretched to 7 times its own length, and still no fracture occurs, indicating that Fe 3+ The solution enables efficient self-healing of the tough hydrogel.

Embodiment 2

[0032] Immersion of ductile hydrogel stretched into a helical shape in Ni 3+ In an aqueous solution with a concentration of 0.3 mol / L and standing for 20 minutes, the tough hydrogel stretched into a bowl shape becomes a helical structure with very good rigidity. Align the interface of the two tough hydrogel fragments and place 5 drops of Ni 3+ An aqueous solution with a concentration of 0.8mol / L was applied to the interface, and left to stand for 40s. The two tough hydrogel segments were successfully spliced ​​together. The total length after splicing and the sum of the lengths of the two tough hydrogel segments The difference is not big, and at the same time, the toughness of the tough hydrogel after splicing is very good, stretched to 7 times its own length, and no fracture has occurred, indicating that Ni 3+ The solution enables efficient self-healing of the tough hydrogel.

Embodiment 3

[0034] Immerse the tough hydrogel stretched into an L-shape in Mn 4+ In an aqueous solution with a concentration of 1.3 mol / L and standing for 100 min, the tough hydrogel stretched into a bowl shape becomes an L-shaped structure with very good rigidity. Align the interface of the two tough hydrogel fragments and place 4 drops of Mn 4+ An aqueous solution with a concentration of 1.8mol / L was applied to the interface and left to stand for 70s. The two tough hydrogel segments were successfully spliced ​​together. The total length after splicing and the sum of the lengths of the two tough hydrogel segments At the same time, the toughness of the spliced ​​flexible hydrogel is very good, stretched to 7 times its own length, and no fracture occurs, indicating that the Mn 4+ The solution enables efficient self-healing of the tough hydrogel.

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

No PUM Login to View More

Abstract

The invention discloses a method for improving the rigidity and self-healing performance of a tough hydrogel. According to the method, metal cations with a valence greater than 2 are introduced into the network structure of the tough hydrogel in a soaking or coating manner; the introduced metal cations with the valence greater than 2 allow the connection of the network structure of the tough hydrogel to be tighter, so the mechanical strength, rigidity and self-healing performance of the tough hydrogel are improved. The method is simple and convenient to operate, allows the tough hydrogel to have self-healing performance and enables the rigidity and self-healing performance of the tough hydrogel to be obviously improved, so further promotion and application of the tough hydrogel are benefited.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for improving the rigidity and self-healing property of tough hydrogel. Background technique [0002] Animal bodies are composed of hydrogel-polymer networks with water permeating them, and most biological hydrogels are flexible and possess strong mechanical strength. The development of hydrogels is a high-profile emerging area. Due to the unique properties and functions of hydrogels, efforts have been devoted to the development of various biomimetic structures based on gel matrices, such as complex and fine nano-hydrogel-driven switches, drug delivery channels in hydrogel matrices, pH-responsive gels, Temperature-responsive gels, etc. [0003] At present, the existing tough gel has good stretchability, high water content and good biocompatibility, but its rigidity and mechanical strength are not high and it is very soft, so it is very easy to break and cannot heal its...

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): C08J7/00C08J3/075C08L5/04
CPCC08J3/075C08J7/00C08J2305/04
Inventor 周学昌李填珍王嘉辉
Owner SHENZHEN UNIV
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