High-resilience self-repair high-polymer aquagel and preparation method thereof

A technology of polymer hydrogel and resilience, which is applied in the field of preparation of polymer hydrogel, can solve problems such as unsatisfactory hydrogel resilience, achieve excellent physical and mechanical properties, good application prospects, and Regulatory effect

Inactive Publication Date: 2015-04-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the research paper "Dynamics and large strain behavior of self‐healing hydrogels with and without surfactants (Deniz C.Tuncaboylu, Melahat Sahin, Aslihan Argun, Wilhelm Oppermann and Oguz Okay, Macromolecules, 2012, 45, 1991.)" , the author designed and constructed a self-healing polymer hydrogel with high healing rate and high elongation at break by hydrophobic interaction, but the resilience performance of this hydrogel is not satisfactory

Method used

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  • High-resilience self-repair high-polymer aquagel and preparation method thereof
  • High-resilience self-repair high-polymer aquagel and preparation method thereof
  • High-resilience self-repair high-polymer aquagel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Synthesis of hydrophilic polyurethane macromonomers terminated by hydroxyethyl methacrylate monomers: In terms of mass fraction, first add 75 parts of polyethylene glycol and 1 part of 1,4-butanediol to a 250 ml three-necked flask , stir evenly, heat to 90°C for 3 hours of vacuum defoaming, then let it cool down to below 60°C; then add 20 parts of isophorone diisocyanate drop by drop, after the addition, control the temperature at 70°C for 10 hours, gradually Add 3 parts of hydroxyethyl methacrylate and 1 part of dibutyltin dilaurate dropwise, and react for 64 hours to obtain a hydrophilic polyurethane macromonomer terminated by hydroxyethyl methacrylate, which is sealed and refrigerated for use after vacuum defoaming;

[0038] Preparation of high resilience self-healing polymer hydrogel: by mass fraction, 2.5 parts of sodium dodecylsulfonate and 0.2 parts of sodium chloride were added to 40 parts of deionized water, stirred until a transparent solution was obtained, The...

Embodiment 2

[0045] Preparation of high-resilience self-healing polymer hydrogel: In terms of mass fraction, 3 parts of sodium dodecylsulfonate and 0.1 part of sodium chloride were added to 20 parts of deionized water, and stirred until a transparent solution was obtained. Then 1 part of stearyl acrylate is added to the solution and stirred evenly to obtain an aqueous solution of micelles containing stearyl acrylate; Molecular monomers were added to 30 parts of deionized water, and ultrasonically treated for 60 minutes to obtain a self-assembly aqueous solution of a hydrophilic polyurethane macromer terminated by hydroxyethyl methacrylate; then the micellar aqueous solution and the self-assembly aqueous solution were mixed Evenly, add 10 parts of acrylamide monomer and 0.2 parts of photoinitiator 2-hydroxy-2-methyl-1-phenylacetone, and dissolve it completely with ultrasound; carry out free radical polymerization under photoinitiation for 120 minutes, A polymer hydrogel is obtained.

[004...

Embodiment 3

[0048] Synthesis of polyethylene glycol acrylate-terminated hydrophilic polyurethane macromers: in terms of mass fraction, 40 parts of polyethylene glycol, 0.5 parts of 1,4-butanediol and 0.5 parts of trimethylolpropane were added to the In a 250ml three-neck flask, stir evenly, heat to 130°C for 2 hours and vacuum defoaming, then let it cool down to below 60°C; then add 15 parts of isophorone diisocyanate drop by drop, and control the temperature at 90°C to react For 3 hours, add 3 parts of hydroxyethyl methacrylate and 1 part of dibutyltin dilaurate dropwise, and react for 10 hours to obtain a hydrophilic polyurethane macromer terminated by hydroxyethyl methacrylate, which is sealed after vacuum defoaming Refrigerate for later use;

[0049] From the spectrogram ( Image 6 ), it can be seen that the chemical shift of 0.8-1.0ppm is the hydrogen on the methyl group in isophorone diisocyanate, 3.5-3.66ppm is the hydrogen on the methylene group in polyethylene glycol, 5.5 and 6....

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Abstract

The invention discloses a high-resilience self-repair high-polymer aquagel and a preparation method thereof. The high-resilience self-repair high-polymer aquagel is prepared from the following raw materials in parts by mass: 15-20 parts of polyisocyanate, 40-75 parts of hydrophilic polyester polyol or hydrophilic polyether glycol, 1-5 parts of acrylate monomer, 10-15 parts of acrylamide monomer, 0.5-2 parts of chain extender, 1-3 parts of surfactant, 0.1-1 part of alkyl acrylate monomer and 0.5-2 parts of catalyst. The preparation method comprises the following steps: preparing an acrylate-monomer-terminated hydrophilic polyurethane high-polymer monomer self-assembly and an alkyl acrylate micelle; and carrying out radical copolymerization with acrylamide monomer under the photoinitiation action. The obtained self-repair high-polymer aquagel can complete self repair on self damage without any repair agent or specific environment, and has excellent resilience and physical and mechanical properties.

Description

technical field [0001] The invention relates to a preparation method of a polymer hydrogel, in particular to a polymer hydrogel with high resilience and self-repairing performance and a preparation method thereof. Background technique [0002] The resilience performance of polymer hydrogel is an important performance index of hydrogel, which refers to the ability of polymer hydrogel to recover its original shape and performance after being deformed under the action of force. However, in most of the polymer hydrogels reported so far, they exhibit poor resilience performance, which is embodied in long deformation recovery time and large hysteresis circle in the stress-strain curve of cyclic compression. People have also done a lot of work in this area and achieved certain results. The main methods include the compounding of hydrophilic organic polymer materials and inorganic materials, the design of polymer material structures, and the compounding of different polymer materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/18C08F220/56C08F220/54C08F220/60C08F2/48C08G18/67C08G18/66
Inventor 李光吉林殷雷何德柳王立莹陈志锋
Owner SOUTH CHINA UNIV OF TECH
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