Preparation method of double-network hydrogel based on coordination crosslinking and hydrophobic association crosslinking

A technology of coordination cross-linking and hydrophobic association, which is applied in the field of preparation of double network hydrogels, can solve problems such as difficult removal, fragility of the first network hydrogel, and insufficient mechanical properties of hydrogels, and achieves improved mechanical properties. performance, excellent mechanical properties and structural stability, and the effect of high polymerization rate

Inactive Publication Date: 2019-06-25
NORTHWESTERN POLYTECHNICAL UNIV
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing a double network hydrogel based on coordination crosslinking and hydrophobic association crosslinking, which solves the problem of insufficient mechanical properties of traditional hydrogels, and the traditional double network Network hydrogel The first network hydrogel is brittle and difficult to remove from the mold

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
  • Preparation method of double-network hydrogel based on coordination crosslinking and hydrophobic association crosslinking
  • Preparation method of double-network hydrogel based on coordination crosslinking and hydrophobic association crosslinking
  • Preparation method of double-network hydrogel based on coordination crosslinking and hydrophobic association crosslinking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step (1): Weigh 2g of carboxymethylcellulose (CMC) and 30g of deionized water and mix them in a magnetic stirring water bath at a temperature of 70°C for 30 minutes, so that the carboxymethylcellulose is fully dissolved in water and drops to At room temperature, carboxymethylcellulose solution was obtained.

[0038] Step (2): Weigh 10g of acrylamide (AM), 0.7141g of hydrophobic monomer octadecyl methacrylate SMA, 2.5g of sodium dodecyl sulfate (SDS), 1.5g of NaCl and 20g of deionized water, mix, and stir to dissolve at room temperature.

[0039]Step (3): Mix the carboxymethyl cellulose solution prepared in step (1) with the solution obtained in step (2), and stir in a magnetic stirring water bath at a water temperature of 40°C for 30 minutes to mix the two solutions evenly Bring to room temperature. Weigh 46.9 mg of azobisisobutyronitrile (AIBN), dissolve it in 4 g of deionized water, pour it into the above mixed feed solution, and stir at room temperature for 10 minu...

Embodiment 2

[0043] Step (1): Weigh 2g of carboxymethylcellulose (CMC) and 30g of deionized water and mix them in a magnetic stirring water bath at a temperature of 70°C for 30 minutes, so that the carboxymethylcellulose is fully dissolved in water and drops to At room temperature, carboxymethylcellulose solution was obtained.

[0044] Step (2): Weigh 10g of acrylamide (AM), 0.7141g of hydrophobic monomer octadecyl methacrylate SMA, 2.5g of sodium dodecyl sulfate (SDS), 1.5g of NaCl and 20g of deionized water, mix, and stir to dissolve at room temperature.

[0045] Step (3): Mix the carboxymethyl cellulose solution prepared in step (1) with the solution obtained in step (2), and stir in a magnetic stirring water bath at a water temperature of 40°C for 30 minutes to mix the two solutions evenly Bring to room temperature. Weigh 46.9 mg of azobisisobutyronitrile (AIBN), dissolve it in 4 g of deionized water, pour it into the above mixed feed solution, and stir at room temperature for 10 min...

Embodiment 3

[0049] Step (1): Weigh 1g of carboxymethylcellulose (CMC) and mix it with 30g of deionized water, and stir in a magnetic stirring water bath at a temperature of 70°C for 30 minutes, so that the carboxymethylcellulose is fully dissolved in water and then drops to At room temperature, carboxymethylcellulose solution was obtained.

[0050] Step (2): Weigh 10g of acrylamide (AM), 0.7141g of hydrophobic monomer octadecyl methacrylate SMA, 2.5g of sodium dodecyl sulfate (SDS), 1.5g of NaCl and 20g of deionized water, mix, and stir to dissolve at room temperature.

[0051] Step (3): Mix the carboxymethyl cellulose solution prepared in step (1) with the solution obtained in step (2), and stir in a magnetic stirring water bath at a water temperature of 40°C for 30 minutes to mix the two solutions evenly Bring to room temperature. Weigh 46.9 mg of azobisisobutyronitrile (AIBN), dissolve it in 4 g of deionized water, pour it into the above mixed feed solution, and stir at room temperat...

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 strengthaaaaaaaaaa
breaking strengthaaaaaaaaaa
breaking strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of double-network hydrogel based on coordination crosslinking and hydrophobic association crosslinking. The polyacrylamide hydrogel is formed by adoptingan AIBN thermal initiation mode, and a coordination bond is formed by adopting a post-coordination crosslinking mode, so that the double-network polyacrylamide hydrogel containing coordination crosslinking and hydrophobic association crosslinking mechanisms is formed. The preparation method does not need light shielding operation, and the selected initiator has moderate solubility in water and anoil phase; polymerization inside and outside the micelle is initiated at the same time, and a coordination bond is formed in a metal salt soaking manner after molding. The method has the advantages ofeasily available monomers, simple process and high polymerization rate, and the obtained hydrogel has excellent mechanical properties and structural stability.

Description

technical field [0001] The invention belongs to the field of preparation of double-network hydrogels, and relates to a preparation method of double-network hydrogels based on coordination crosslinking and hydrophobic association crosslinking. Background technique [0002] Hydrogel is a kind of material made of a kind of hydrophilic cross-linked polymer three-dimensional network structure that can absorb a large amount of water and is insoluble in water. Polymer hydrogels have both solid and liquid properties. Due to their special physical and chemical properties, hydrogels are widely used in the fields of biology, medicine, energy and so on. [0003] Due to the low density of molecular chains in the hydrogel matrix, the small force between molecular chains, and the uneven distribution of chemical cross-linking points, the hydrogel exhibits poor mechanical properties and poor stability in the macroscopic view, which severely limits the hydraulic coagulation of polymers. The...

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 Applications(China)
IPC IPC(8): C08F251/02C08F220/56C08F220/18C08F2/26C08J3/075C08J3/24
Inventor 尹德忠陈进华张秋禹袁成睿赵娇娇
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap