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Oxidized graphene and graphene reinforced cement based composite material and preparation method thereof

A technology for reinforcing cement and composite materials, which is applied in the field of nano-material reinforced composite materials, can solve the problems of reinforced cement-based composite materials without relevant reports and patent applications, easy to entangle and agglomerate, and achieve excellent mechanical and electrical properties. The effect of low cost and improved conductivity

Active Publication Date: 2013-06-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, there are no relevant reports and patent applications for the use of graphene or graphene oxide in strengthening cement-based composites.
However, due to the large specific surface area of ​​graphene or graphene oxide, there is a strong van der Waals force between them, which makes it easy to entangle and agglomerate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] Preparation of slurry

[0021] Firstly, a dispersant solution is prepared, and the dispersant is dissolved in water, preferably in deionized water to prepare the dispersant solution for use. Here, the dispersant can be one of a cationic dispersant, an anionic dispersant, and a nonionic dispersant, or a combination of a nonionic dispersant, a cationic dispersant, and an anionic dispersant; Cationic dispersants such as octadecyl trimethyl ammonium chloride, C12-14 alkyl dimethyl benzyl ammonium chloride, dioctadecyl dimethyl sodium chloride, hexadecyl trimethyl bromide ammonium chloride, cetyltrimethylammonium chloride, sodium dodecylbenzenesulfonate; nonionic dispersants such as polyethylene glycol octylphenyl ether, nonylphenol polyoxyethylene ether emulsifier, arabic Gum, sorbitan monolaurate (Span-20, Span-40, Span-60 and Span-80), ethylene oxide adducts (Tween-20, Tween-40, Tween-60 and Tween-80), laureth, diethanolamide cocoate, monoglyceride oleate, polyoxyethyle...

Embodiment 1

[0033] Preparation of graphene oxide and graphene-reinforced cement-based composites consist of graphene oxide, graphene, dispersant, thickening stabilizer, water reducer, defoamer and cement matrix. For convenience, the following examples all take 100 parts of cement matrix as the unit. Using 0.1 part of cetyltrimethylammonium bromide as a dispersant, dissolved in 13 parts of deionized water to prepare a mixed solution, 0.5 parts of graphene oxide was added to the above mixed solution, and the graphene oxide used was Prepared by the Hummer method, the thickness of graphene oxide is 1nm-2nm, the size of graphene is 200nm-5μm, and the mass content of oxygen in graphene oxide is 25%; 0.2 parts of methyl cellulose is used as a thickening and stabilizing agent under strong stirring Add 0.2 parts of carboxylic acid polyether ester block copolymer high-efficiency water reducer to 1 part of deionized water and stir until completely dissolved, then add the mixed solution of graphene o...

Embodiment 2

[0035] Basically repeat the steps of Example 1, but the difference between this example and Example 1 is that the graphene oxide used is 1.0 parts, and the obtained graphene oxide reinforced cement-based composite material has better tensile and flexural resistance than the blank test piece. The strength increased by 22.3% and 43.3%, respectively, and the electrical conductivity increased by 12.8%.

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Abstract

The invention relates to an oxidized graphene and graphene reinforced cement based composite material and a preparation method thereof. The oxidized graphene and graphene reinforced cement based composite material comprises the oxidized graphene, the graphene, a dispersing agent, a thickening stabilizer, a water reducer, a defoaming agent and a cement matrix, the mass ratio of the total mass of the oxidized graphene and the graphene to the cement matrix is (0.0005-0.5):1, and the mass ratio of the total mass of oxidized graphene and the graphene to the dispersing agent to the water reducer to the thickening stabilizer to the defoaming agent is 1:(0.05-10):(0.1-20):(0.1-20):(0.05-5). In the composite material, the oxidized graphene and the graphene are dispersed in the cement matrix uniformly; compared with the traditional cement material, the tensile strength, rupture strength and conductivity of the composite material are all improved remarkably; and the composite material has more excellent mechanical property and electrical property, and is applicable to the field of multifunctional construction materials.

Description

technical field [0001] The invention relates to the technical field of nanomaterial-reinforced composite materials, in particular to a graphene oxide and graphene-reinforced cement-based composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional (2D) periodic honeycomb lattice structure composed of carbon six-membered rings. Its unique crystal structure gives it excellent properties, such as high thermal conductivity, high mechanical strength, and unique electrical and optical properties. For example: graphene has extremely high electron mobility, up to 20,0000cm 2 ×V -1 ×s -1 , The electrical conductivity of graphene also reaches 1000000S / m. In addition, graphene is currently the material with the best mechanical properties in nature. Its Young's modulus is 1TPa and its tensile strength is as high as 130GPa. ([Specifically, see literature: K.S.Novoselov et al.Science, 2004,306:666.C.Lee, et al.Science, 2008,321:385.K....

Claims

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Application Information

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IPC IPC(8): C04B22/02
Inventor 黄富强毕辉张晓平
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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