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
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[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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