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Method for preparing nano-composite hydrogel with excellent mechanical performances

A nanocomposite and hydrogel technology, which is applied in the field of preparation of nanocomposite hydrogels, can solve the problems of low strength and poor transparency of PVP gels, and achieve the effect of good transparency and simple preparation process

Inactive Publication Date: 2008-12-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PVP gel prepared by these methods is not high in strength and poor in transparency, which is difficult to meet the needs of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 1g monomer vinylpyrrolidone and 0.1g inorganic clay Laponite in 4ml deionized water. In a sealed container, pour nitrogen into it and stir for 30 minutes. Then add 0.02g azobisisobutyronitrile and stir for another 10 minutes. The reaction was allowed to stand in deionized water at 70°C for 6 hours. After the reaction, the reactants are soaked in deionized water for 48 hours, and the water is changed regularly to obtain a hydrogel with good mechanical properties.

[0020] The measured light transmittance of the hydrogel is 90%, the compression modulus is 38MPa, the compression yield strain is 67%, and the water absorption weight is 15.1 times its own weight.

Embodiment 2

[0022] Dissolve 1g monomer vinylpyrrolidone and 0.6g inorganic clay Laponite in 20ml deionized water. In a sealed container, pour nitrogen into it and stir for 120 minutes. Then add 0.03g azobisisobutyronitrile and stir for another 20 minutes. The reaction was allowed to stand for 5 hours in deionized water at 90°C. After the reaction, the reactants are soaked in deionized water for 48 hours, and the water is changed regularly to obtain a hydrogel with good mechanical properties.

[0023] According to the actual measurement, the light transmittance of the hydrogel is 83%, the compression modulus is 55 MPa, the compression yield strain is 45%, and the water absorption weight is 12.7 times its own weight.

Embodiment 3

[0025] Dissolve 1g monomer vinylpyrrolidone and 0.3g inorganic clay Laponite in 8ml deionized water. In a sealed container, pour nitrogen into it and stir for 60 minutes. Then add 0.01g azobisisobutyronitrile and stir for another 10 minutes. The reaction was allowed to stand for 9 hours in deionized water at 60°C. After the reaction, the reactants are soaked in deionized water for 48 hours, and the water is changed regularly to obtain a hydrogel with good mechanical properties.

[0026] The measured light transmittance of the hydrogel is 88%, the compression modulus is 57MPa, the compression yield strain is 53%, and the water absorption weight is 12.1 times its own weight.

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Abstract

The invention relates to a method for preparing nano composite hydrogel with good mechanical property, which is characterized by comprising the following steps: firstly, an anhydrous monomer and physical crosslinking agent inorganic clay are dispersed in deionized water, nitrogen enters into a closed container under the condition of normal temperature and normal pressure, and then the mixture is stirred; secondly, an initiator is added, stirring is continued under the condition of normal temperature and normal pressure, and a hydrogel solution is prepared; and thirdly, the solution undergoes free radical polymerization reaction at a certain temperature, and then a reactant is immersed in the deionized water so as to prepare the nano composite hydrogel with good mechanical property. The method has the advantages that: not only the preparation technique is simple but also the gel prepared simultaneously has good transparency, hydroscopic and swelling capacity, and mechanical property.

Description

Technical field [0001] The invention relates to a method for preparing a composite hydrogel, in particular to a method for preparing a nano composite hydrogel with good mechanical properties. Background technique [0002] Hydrogel is a multi-element system composed of a three-dimensional network of polymers and water. It can swell in water and retain a large amount of water without dissolving. It is a material form ubiquitous in nature. Many parts of the biological body (such as the human body) The muscles, blood vessels, eyeballs and other organs are all made of hydrogel. Due to its good biocompatibility, since the 1940s, research on the synthesis, physical and chemical properties of hydrogels and their applications in biology, medicine and other fields has been very active. [0003] According to the different bonding methods of the hydrogel network, it can be divided into physical cross-linked gel and chemical cross-linked gel. Chemically cross-linked gels usually use a small a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F26/10C08F20/28C08F20/56C08F2/44C08F4/04C08F4/34C08K3/34C08J3/075
Inventor 马敬红代旭明梁伯润
Owner DONGHUA UNIV
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