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Composite hydrogel and preparation method and application thereof

A composite hydrogel and reaction technology, which is applied in pharmaceutical formulations, medical preparations of non-active ingredients, medical science, etc., can solve problems such as poor mechanical properties that cannot meet application requirements, poor mechanical strength, and cumbersome preparation methods, etc., to achieve Expanded functionality and application range, ultra-high tensile elongation at break, and the effect of expanding the application range

Pending Publication Date: 2021-04-13
GUANGDONG PROV MEDICAL INSTR INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These application areas have certain requirements on the biocompatibility and mechanical properties of the hydrogel, especially the tensile strength, while the traditional chemically cross-linked hydrogel has irregular cross-linking points, and the length of the polymer molecular chain The distribution is also uneven, which leads to poor mechanical properties and cannot meet the application requirements for higher mechanical properties.
Traditional chemically cross-linked hydrogels often require the addition of small molecule chemical cross-linking agents, which have a great negative impact on the biocompatibility of hydrogels
[0003] Patent document CN107840926A discloses a fast-response high-strength hydrogel. The gel preparation method disclosed in the invention first prepares double-bond functionalized N-isopropylacrylamide microgel as a crosslinking agent to prepare the hydrogel. The technical scheme has many reaction steps, and the preparation method is cumbersome, which increases the operational difficulty of the preparation process and the control difficulty of the preparation results.
[0004] The preparation methods of hydrogels in the prior art are cumbersome, there are many intermediate reaction steps, and the reaction results are not easy to control. There are few reports on ultra-high-strength hydrogels with temperature responsiveness, and there are generally technical problems of poor mechanical strength. needs further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example has the composite hydrogel preparation method of double network structure and comprises the following steps:

[0043] Weigh 0.2g of polyethylene glycol methacrylate and dissolve it in 10mL of pure water to form an aqueous solution, then weigh 2g of N-isopropylacrylamide and 0.02g of graphene oxide and add them to the above solution, stir magnetically for 4 hours, and ultrasonically Mix evenly to form a uniform mixed solution, then add 0.3g of ammonium persulfate to the mixed solution, stir magnetically to form a uniform reaction mixed solution, and finally pour the reaction mixed solution into a mold and place it in a water bath at 50°C for 3 hours to react , to obtain a temperature-responsive highly elastic hydrogel.

[0044] It was found through testing that in the hydrogel prepared in this example, the polyethylene glycol methacrylate semi-interpenetrating poly-N-isopropylacrylamide hydrogel formed a double network structure.

[0045] After testing, the...

Embodiment 2

[0047] This example has the composite hydrogel preparation method of double network structure and comprises the following steps:

[0048]Weigh 0.5g of hydroxyethyl cellulose and dissolve it in 10mL of pure water to make an aqueous solution, then weigh 2g of N-isopropylacrylamide and 0.02g of graphene oxide into the above solution, stir magnetically for 4 hours, and mix evenly with ultrasonic waves A uniform mixed solution is formed, then 0.5 g of ammonium persulfate is added to the mixed solution, magnetically stirred to form a uniform reaction mixed solution, and finally the reaction mixed solution is poured into a mold and placed in a water bath at 50° C. for 3 hours to obtain Highly elastic hydrogels with temperature responsiveness.

[0049] It was found through testing that in the hydrogel prepared in this example, the hydroxyethyl cellulose semi-interpenetrating poly-N-isopropylacrylamide hydrogel formed a double network structure.

[0050] After testing, the phase trans...

Embodiment 3

[0052] This example has the composite hydrogel preparation method of double network structure and comprises the following steps:

[0053] Weigh 0.8g of hydroxyethyl cellulose and dissolve it in 10mL of pure water to make an aqueous solution, then weigh 2g of N-isopropylacrylamide and 0.05g of nanoclay into the above solution, stir magnetically for 2 hours, and mix with ultrasonic waves to form a uniform Uniform mixed solution, then add 0.25g ammonium persulfate to the mixed solution, magnetically stir to form a uniform reaction mixed solution, finally pour the reaction mixed solution into a mold, and place it in a water bath at 50°C for 3 hours to react to obtain Temperature-responsive highly elastic hydrogels.

[0054] It was found through testing that in the hydrogel prepared in this example, the hydroxyethyl cellulose semi-interpenetrating poly-N-isopropylacrylamide hydrogel formed a double network structure.

[0055] After testing, the phase transition temperature of the ...

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Abstract

The invention discloses composite hydrogel and a preparation method and application thereof. The composite hydrogel comprises a first network and a second network, wherein the second network semi-interpenetrates the first network; the first network comprises hydrogel formed by an isopropylacrylamide monomer and nanoparticles; the second network comprises a high-molecular polymer. The composite hydrogel can be applied to the field of biology and / or medicine. The composite hydrogel has a double-network structure, and has temperature responsiveness and ultrahigh mechanical properties. The preparation of the high-elasticity hydrogel adopts cheap and readily available raw materials and a mild preparation process, so that the preparation of the hydrogel is easy for large-scale production, and the application range of the hydrogel is expanded.

Description

technical field [0001] The invention relates to the field of hydrogel technology, in particular to a composite hydrogel and its preparation method and application. Background technique [0002] Hydrogel contains a lot of water and has a three-dimensional network structure, so its application value in the biomedical field is becoming more and more obvious. It can be used as a biosensor, tissue engineering scaffold, bioseparation, drug release carrier, etc. These application areas have certain requirements on the biocompatibility and mechanical properties of the hydrogel, especially the tensile strength, while the traditional chemically cross-linked hydrogel has irregular cross-linking points, and the length of the polymer molecular chain The distribution is also uneven, which leads to poor mechanical properties and cannot meet the application requirements for higher mechanical properties. Traditional chemically cross-linked hydrogels often require the addition of small molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F251/02C08F220/54C08K3/04C08K3/34C08J3/075C08L33/24C08L71/02C08L1/28A61K9/06A61K47/32A61K47/10A61K47/38A61L27/20A61L27/18A61L27/16A61L27/52A61L27/50
CPCC08F283/065C08F251/02C08K3/042C08K3/346C08J3/075A61K9/06A61K47/32A61K47/10A61K47/38A61L27/20A61L27/18A61L27/16A61L27/52A61L27/50C08K2201/011C08J2333/24C08J2471/02C08J2401/28C08F220/54C08L33/24
Inventor 耿志杰于珊裴大婷国翠平鲁道欢
Owner GUANGDONG PROV MEDICAL INSTR INST
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