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 initi

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

Examples

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Example Embodiment

[0031] According to a typical embodiment of the present invention, a graphene-based nanoparticle composite hydrogel. The graphene-based nanoparticle composite hydrogel is composed of graphene-based nanoparticles, a water-soluble polymer, and water. The water-soluble polymer is initiated by the peroxide groups on the graphene-based nanoparticles to contain carbon-carbon double The bond is formed by polymerization of water-soluble monomers, and is cross-linked with graphene-based nanoparticles as cross-linking centers. Since the graphene-based nanoparticle composite hydrogel is only produced by the three-part reaction of graphene-based nanoparticles, soluble monomers and water, there are no residues of other components, which minimizes the potential threat of application in biology 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.

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Example Embodiment

[0041] Example 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℃, and the irradiation dose rate was 0.2kGy / min. After the pre-irradiation, the irradiation solution was measured. 10mL, mix it with acrylamide monomer (2.843g), the resulting acrylamide concentration is 4mol / L, after 30 minutes of nitrogen and deoxygenation, the container containing the mixed solution is sealed and heated. The reaction temperature is 80℃. The product will be available after 24 hours. At room temperature, the beam speed is controlled to 40mm / min, and the tensile and compressive strength tests are carried out with an electronic universal testing machine. The measurement result is: the water content of the sample is 75%, the tensile breaking strength is 0.2 MPa, the breaking elongation is 600%, and the compressive strength at 95% compression ratio is 2.50 MPa.

Example Embodiment

[0043] Example 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℃, and the irradiation dose rate was 0.25kGy / min. After the pre-irradiation, it was combined with the acrylic acid aqueous solution Each 5 mL was uniformly mixed, the concentration of acrylic acid was 3 mol / L, the container containing the mixed solution was sealed and heated after 20 minutes of deoxygenation with nitrogen, the reaction temperature was 45°C, and the product was obtained after 36 hours of reaction. Under room temperature conditions, the beam speed is controlled to 20mm / min, and the tensile and compressive strength tests are performed on it with an electronic universal testing machine. The measurement result is: the water content of the sample is 70%, the tensile breaking strength is 0.3 MPa, the breaking elongation is 2400%, and the compressive strength at 95% compr...

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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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