High-strength and temperature-sensitive polymer-graphene oxide composite hydrogel and conductive graphene composite hydrogel as well as preparation methods thereof

A graphene composite and composite hydrogel technology, applied in the field of conductive polymer-graphene composite hydrogel and its preparation, polymer-graphene oxide composite hydrogel, can solve polymer-graphene hydrogel Solve the problems of low strength, low conductivity, and low strength of glue, achieve good mechanical properties and temperature responsiveness, simple preparation method, and low cost

Inactive Publication Date: 2014-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a novel polymer-graphene oxide composite hydrogel for the low strength of the existing polymer-graphene oxide gel, the low strength and low conductivity of the polymer-graphene hydrogel And a kind of conductive polymer-graphene composite hydrogel and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, 80 mg of graphene oxide was dispersed in 10 mL of deoxygenated deionized water by ultrasonication, and a uniformly dispersed dispersion was obtained by ultrasonication for 2 h. Disperse 0.6 g of Laponite XLS in the above-prepared graphene oxide dispersion, stir for 1 h, and then sonicate for 1 h to obtain a uniform dispersion; then add 1.13 g N -Isopropylacrylamide monomer was stirred for 2 h under ice-water bath conditions, and argon gas was passed through the reaction solution to deoxygenate for 10 min; finally, 0.5 mL of initiator potassium persulfate (KPS, 20 mg / mL) was added and Catalyst tetramethylethylenediamine (TEMED) 10 μL, stirred evenly, transferred to a glass test tube and a reaction mold with a thickness of 2 mm to seal, and reacted in a biochemical incubator at 20 °C for 48 h to obtain lithium alginite-reinforced polystyrene. N - Isopropylacrylamide-lithium-graphene oxide composite hydrogel, that is, the high-strength, temperature-sen...

Embodiment 2

[0034] At room temperature, 80 mg of graphene oxide was dispersed in 10 mL of deoxygenated deionized water by ultrasonication, and a uniformly dispersed dispersion was obtained by ultrasonication for 2 h. Disperse 0.6 g of Laponite XLS in the graphene oxide dispersion prepared above, stir for 1 h, and then sonicate for 1 h to obtain a uniform dispersion; then add 1.56 g N -Isopropylacrylamide monomer was stirred for 2 h under ice-water bath conditions, and argon gas was passed through the reaction solution to deoxygenate for 10 min; finally, 0.5 mL of initiator potassium persulfate (KPS, 20 mg / mL) was added and Catalyst tetramethylethylenediamine (TEMED) 10 μL, stirred evenly, transferred to a glass test tube and a reaction mold with a thickness of 2 mm to seal, and reacted in a biochemical incubator at 20 °C for 48 h to obtain lithium alginite-reinforced polystyrene. N - Isopropylacrylamide-lithium-graphene oxide composite hydrogel, that is, the high-strength, temperature-sen...

Embodiment 3

[0036] At room temperature, 80 mg of graphene oxide was dispersed in 10 mL of deoxygenated deionized water by ultrasonication, and a uniformly dispersed dispersion was obtained by ultrasonication for 2 h. Disperse 0.2 g of Laponite XLS in the above-prepared graphene oxide dispersion, stir for 1 h, and then sonicate for 1 h to obtain a uniform dispersion; then add 1.13 g N -Isopropylacrylamide monomer was stirred for 2 h under ice-water bath conditions, and argon gas was passed through the reaction solution to deoxygenate for 10 min; finally, 0.5 mL of initiator potassium persulfate (KPS, 20 mg / mL) was added and Catalyst tetramethylethylenediamine (TEMED) 10 μL, stirred evenly, transferred to a glass test tube and a reaction mold with a thickness of 2 mm to seal, and reacted in a biochemical incubator at 20 °C for 48 h to obtain lithium alginite-reinforced polystyrene. N - Isopropylacrylamide-lithium-graphene oxide composite hydrogel, that is, the high-strength, temperature-sen...

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Abstract

The invention discloses a high-strength and temperature-sensitive polymer-graphene oxide composite hydrogel and a conductive polymer-graphene composite hydrogel as well as preparation methods thereof. The preparation methods comprise the following steps: dispersing laponite in an aqueous graphene oxide dispersion, stirring, and performing ultrasonic treatment to obtain an uniform dispersion; adding N-isopropyl acrylamide monomer, stirring uniformly and deoxidizing, adding an initiator and a catalyst, transferring the reaction liquid into a glass test tube or a reaction mold for sealing, and performing in-situ free radical polymerization at 15-25 DEG C so as to obtain the polymer-graphene oxide composite hydrogel; and then, reducing the prepared polymer-graphene oxide composite hydrogel with L-ascorbic acid so as to obtain the conductive graphene composite hydrogel. According to the invention, the prepared polymer-graphene oxide composite hydrogel has good mechanical property and thermo-sensitivity; and the prepared conductive graphene composite hydrogel also has good mechanical property, thermo-sensitivity and high conductivity simultaneously.

Description

technical field [0001] The invention relates to the fields of graphene composite materials and environment-sensitive polymer materials, in particular to a polymer-graphene oxide composite hydrogel, a conductive polymer-graphene composite hydrogel and a preparation method thereof. Background technique [0002] Since Professor Geim of the University of Manchester first prepared single-layer graphene in 2004, its unique properties have attracted widespread attention from scientists. Graphene is a new carbon material formed by the close packing of single-layer carbon atoms, and is currently the thinnest two-dimensional material in the world. Graphene has very high electrical conductivity, also has good thermal conductivity, high strength, high transparency and super large specific surface area. These excellent properties make it have great application prospects in the fields of microelectronics, energy, information materials and biomedicine. Hydrogel has a three-dimensional ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/54C08F2/44C08K9/02C08K3/04C08K3/34C08J7/12C08L33/24
Inventor 童真张恩重王涛孙尉翔刘新星
Owner SOUTH CHINA UNIV OF TECH
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