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Graphene-based nano particle composite hydrogel and preparation method thereof

A composite hydrogel and nanoparticle technology, which is applied in the field of graphene-based nanoparticle composite hydrogel and its preparation, can solve problems such as threat, mechanical property impact, component residue, etc., achieve good mechanical properties, simplify the reaction process, The effect of simplifying the operation process

Inactive Publication Date: 2012-06-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims to provide a graphene-based nanoparticle composite hydrogel and its preparation method to solve the problem that some components may remain in the nanocomposite gel in the prior art due to the addition of initiators and crosslinking agents. In the biological field, there may be potential threats and technical problems that its mechanical properties will be greatly affected when it is swollen to a high water content or reaches a swelling equilibrium.

Method used

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  • Graphene-based nano particle composite hydrogel and preparation method thereof
  • Graphene-based nano particle composite hydrogel and preparation method thereof
  • Graphene-based nano particle composite hydrogel and preparation method thereof

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Embodiment approach

[0031] According to a typical embodiment of the present invention, the graphene-based nanoparticle composite hydrogel. The graphene-based nanoparticle composite hydrogel is composed of graphene-based nanoparticles, water-soluble polymers, and water, wherein the water-soluble polymer contains carbon-carbon double It is polymerized from water-soluble monomers with bonds, and cross-linked with graphene-based nanoparticles as the cross-linking center. Since the graphene-based nanoparticle composite hydrogel is only formed by the three-part reaction of graphene-based nanoparticles, soluble monomers, and water, there are no residues of other components, which minimizes potential threats to applications in biological and other fields; and When the graphene-based nanoparticle composite hydrogel is swollen to a high water content or reaches a swelling equilibrium, it can still maintain good mechanical properties.

[0032] The above-mentioned water-soluble monomer only needs to contain...

Embodiment 1

[0042] The uniformly dispersed 0.1wt% graphite oxide colloidal solution was irradiated with a cobalt source in an oxygen atmosphere for 4 hours, the irradiation temperature was 100°C, the irradiation dose rate was 0.2kGy / min, and the irradiation solution was measured after the pre-irradiation 10mL, mix it with acrylamide monomer (2.843g), and the concentration of the obtained acrylamide is 4mol / L. After 30 minutes of deoxygenation with nitrogen, seal the container holding the mixed solution and heat it. The reaction temperature is 80°C. The product is available after 24 hours. At room temperature, the beam speed is controlled at 40mm / min, and the tensile and compressive strength tests are carried out with an electronic universal testing machine. The measurement results are: the water content of the sample is 75%, its tensile strength at break is 0.2 MPa, its elongation at break is 600%, and its compressive strength at 95% compression ratio is 2.50 MPa.

Embodiment 2

[0044] The uniformly dispersed 0.15wt% graphite oxide colloidal solution was irradiated with a cobalt source under an oxygen atmosphere for 10 hours, the irradiation temperature was 40°C, and the irradiation dose rate was 0.25kGy / min. Mix 5 mL each evenly, the concentration of acrylic acid is 3 mol / L, and after purging nitrogen for 20 minutes, seal the container holding the mixed solution and heat it. The reaction temperature is 45°C, and the product is obtained after 36 hours of reaction. Under room temperature conditions, the beam speed is controlled at 20mm / min, and the tensile and compressive strength tests are carried out with an electronic universal testing machine. The measurement results are: the water content of the sample is 70%, its tensile strength at break is 0.3 MPa, its elongation at break is 2400%, and its compressive strength at 95% compression ratio is 20.55 MPa.

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Abstract

The invention discloses graphene-based nano particle composite hydrogel and a preparation method thereof. The nano particle composite hydrogel consists of graphene-based nano particles, a water-soluble polymer and water, wherein the water-soluble polymer is formed by polymerizing water-soluble monomers containing carbon-carbon double bonds under the initiation of peroxide groups on the graphene-based nano particles, and the water-soluble polymer is cross-linked by using the graphene-based nano particles as cross-linking centers. The preparation method for the graphene-based nano particle composite hydrogel comprises a pre-irradiation peroxidation step and a thermal initiated polymerization step. The graphene-based nano particle composite hydrogel has excellent mechanical properties, namely the tensile strength is hundreds of kPa to over 1MPa, and the elongation at break is more than 2,000 percent. The mechanical properties of the hydrogel can be conveniently adjusted by controlling the preparation technology to meet the requirements of different application occasions. The hydrogel can be applied in the fields of biology, medicine and the like.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a graphene-based nanoparticle composite hydrogel and a preparation method thereof. Background technique [0002] Polymer hydrogel, as a soft and wet material with "rigidity and softness", has been a research hotspot in recent decades. The special properties of hydrogels different from other rigid materials make them show good application prospects in the fields of industry, agriculture, biology and materials. However, most traditional gels have low strength and poor toughness, which limits their practical application as functional materials in various fields to a certain extent. Nanoparticle composite hydrogel is a composite material formed by dispersing nanometer-sized inorganic particles in hydrogel. It combines the rigidity and dimensional stability of nanomaterials with the soft-wet performance of hydrogel, which significantly improves Mechanical properties and thermal stab...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08J3/075
Inventor 汪辉亮刘佳奇
Owner BEIJING NORMAL UNIVERSITY
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