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Polymer hydrogel and preparation method thereof

A polymer hydrogel and polymer technology, applied in the field of polymer hydrogel, can solve the problems of complicated preparation process, poor comprehensive performance and high mechanical strength, and achieve a wide range of applications, high tensile strength, and easy availability of raw materials. Effect

Active Publication Date: 2018-08-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the current reports on high-strength polymer hydrogels, there are gels formed by cumbersome preparation processes, harsh conditions, or crosslinking by irreversible covalent bonds, which often show poor comprehensive properties.
It is difficult to have both high mechanical strength and elongation at break. It does not have high water absorption performance while exhibiting high mechanical strength, which largely limits the application of hydrogels in many fields.
[0006] Therefore, the current research on polymer hydrogels still needs to be in-depth.

Method used

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  • Polymer hydrogel and preparation method thereof
  • Polymer hydrogel and preparation method thereof
  • Polymer hydrogel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0068] (1) Dissolve vinyl-functionalized silica particles with a particle size of 3nm in deionized water, disperse them uniformly by ultrasonication for 30 minutes, then add acrylamide monomer, stir for 10 minutes, and add the initiator after it dissolves Ammonium persulfate was dissolved by stirring for 10 minutes to obtain a mixed solution containing vinyl-functionalized silica particles, acrylamide and ammonium persulfate. Wherein, the mass fraction of vinyl-functionalized silica particles with a particle diameter of 3 nm is 0.14%, the mass fraction of acrylamide is 25%, the mass fraction of ammonium persulfate is 0.1%, and the balance is deionized water.

[0069] (2) Into the mixed solution obtained in step (1), feed nitrogen to drive oxygen for 30 minutes to 60 minutes, then pour the mixed solution into a cylindrical mold with a diameter of 5 mm, initiate free radical polymerization for 24 hours at 35° C., and pass The hydrogen bonds between the amide groups on the polyme...

Embodiment 2

[0073] (1) Dissolve silica particles with reactive functional groups with a particle size of 52nm in deionized water, disperse them uniformly by ultrasonication for 50 minutes, then add acrylamide monomer, stir for 10 minutes to dissolve, then add the initiator Potassium sulfate was dissolved by stirring for 10 minutes to obtain a mixed solution containing vinyl-functionalized silica particles, acrylamide and ammonium persulfate. Wherein, the mass fraction of vinyl-functionalized silica particles with a particle diameter of 52 nm is 0.14%, the mass fraction of acrylamide is 25%, the mass fraction of potassium persulfate is 0.2%, and the balance is deionized water.

[0074] (2) Into the mixed solution obtained in step (1), feed nitrogen to drive oxygen for 30 minutes to 60 minutes, then pour the mixed solution into a cylindrical mold with a diameter of 5 mm, initiate free radical polymerization at 30°C for 24 hours, pass The hydrogen bonds between the amide groups on the polyme...

Embodiment 3

[0077] (1) Dissolve vinyl-functionalized silica particles with a particle size of 3nm in deionized water, disperse them uniformly by ultrasonication for 30 minutes, then add acrylamide monomer, stir for 10 minutes to dissolve them, and then add the initiator Ammonium persulfate was dissolved by stirring for 10 minutes to obtain a mixed solution of vinyl-containing silicon dioxide particles, acrylamide and ammonium persulfate. Wherein, the mass fraction of vinyl-functionalized silica particles with a particle diameter of 3 nm is 0.07%, the mass fraction of acrylamide is 25%, the mass fraction of ammonium persulfate is 0.1%, and the balance is deionized water.

[0078] (2) Into the mixed solution obtained in step (1), feed nitrogen to drive oxygen for 30 minutes to 60 minutes, then pour the mixed solution into a cylindrical mold with a diameter of 5 mm, initiate free radical polymerization for 24 hours at 35° C., and pass The hydrogen bonds between the amide groups on the polyme...

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Abstract

The invention provides a polymer hydrogel and a preparation method thereof. The polymer hydrogel is formed by gelators through mutual physical interaction, wherein the gelators comprise nano materials with reactive functional groups and macromolecular chains which are grafted on the surfaces of the nano materials through the reactive functional groups. The gel is physical gel, has thermal reversibility and meanwhile has high strength and hydroscopicity.

Description

technical field [0001] The invention belongs to the field of polymer hydrogel, in particular to a high-strength, superabsorbent polymer hydrogel and its preparation method and application. Background technique [0002] Polymer hydrogel is a soft material composed of a three-dimensional network formed by cross-linked polymers and a large amount of water. Polymer hydrogels have biosimilar compatibility, high water absorption and stimuli responsiveness, so they have a wide range of application values ​​in many fields, such as tissue engineering, drug delivery, sanitary materials, separation materials, water and soil conservation, construction materials and adsorption Materials and other fields, and achieved considerable economic benefits. [0003] However, the poor mechanical properties of polymer hydrogels prepared by traditional methods, such as low strength and modulus and brittleness, limit their further applications. Preparation of high-strength polymer hydrogel, in orde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/56C08F220/18C08F220/06
Inventor 谢续明时富宽钟鸣王曦平张丽琴
Owner TSINGHUA UNIV
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