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A kind of graphene/cement mortar composite material and preparation method thereof

A graphene-based material and composite material technology, applied in graphene/cement mortar composite material and preparation thereof, graphene-based material/cement mortar composite material and preparation field thereof, can solve the problem of difficulty in opening, inability to stably disperse, graphene It is easy to agglomerate and other problems, and achieves the effect of less wrinkles, good mechanical properties, and solving uneven mixing.

Active Publication Date: 2019-07-09
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, graphene / cement composite materials have gradually been reported. However, in practical applications, graphene still has many problems and constraints. The easy agglomeration of graphene is a major obstacle restricting the research and application of graphene.
Due to the large specific surface area of ​​graphene and its derivatives, there is a strong van der Waals interaction between them, and the phenomenon of agglomeration and entanglement is obvious, so that it cannot be dispersed stably, and it is easy to reunite and difficult to open after dispersion.
Although a large number of studies have improved the dispersion effect of graphene by adding different types of dispersants or modification methods, the effect is poor in practical applications, and additional impurities will be introduced, which will have a negative impact on subsequent research.

Method used

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  • A kind of graphene/cement mortar composite material and preparation method thereof
  • A kind of graphene/cement mortar composite material and preparation method thereof
  • A kind of graphene/cement mortar composite material and preparation method thereof

Examples

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preparation example Construction

[0063] The present invention also provides a kind of preparation method of graphene / cement mortar composite material, comprises the following steps:

[0064] A) after mixing the graphene-like material and the sand and gravel, obtain the composite material of the graphene-like material and the sand and gravel;

[0065] B) After mixing again the composite material of the graphene-like material obtained in the above steps and the sandstone, cement and water, the graphene / cement mortar composite material is obtained.

[0066] The present invention can correspond to the selection and composition of the raw materials required in the above-mentioned preparation process, and the corresponding optimization principles, and the selection and composition of the corresponding raw materials in the aforementioned graphene / cement mortar composite material, and the corresponding optimization principles. This will not repeat them one by one.

[0067] In the invention, firstly, the graphene-lik...

Embodiment 1

[0105] 1) Take a certain amount of 0.5% graphene oxide (CN 106115669A) ethanol solution and stir it ultrasonically for 3 hours;

[0106] 2) Slowly add 250g of standard sand particles into the graphene oxide solution obtained in step 1) under mechanical stirring according to the ratio of 0.5% graphene oxide, and continue stirring for 30min;

[0107] 3) Add the mixed solution obtained in step 2) into the rotary evaporator;

[0108] 4) Control the degree of vacuum to 0.09Mpa, the temperature of the water bath to 60°C, and the rotation speed to 50RPM, and continue until the material is in a dry state to obtain sand particles with graphene oxide evenly dispersed on the surface, that is, graphene oxide coated particles;

[0109] The graphene oxide / standard sand composite material prepared in Example 1 of the present invention was characterized and analyzed, and the macroscopic analysis showed that the color of the standard sand after coating was obviously darker than that before coa...

Embodiment 2

[0113] 1) Take 1350g of standard sand and compound it with graphene oxide (CN106430175A) according to the ratio of 0.2% graphene oxide, so that it can be wrapped; (specific steps can refer to Example 1)

[0114] 2) Put the graphene oxide composite standard sand in 1) in the sand tank of the mortar mixer, add 450g of 42.5R Portland cement and 225g of water into the mixing tank, and stir at a low speed for 30S. Stir in the second 30S and add sand at the same time. After adding sand, the machine stirs at high speed for 30S, and then stops stirring for 90S;

[0115] 3) Use a rubber tool to scrape the rubber sand on the blade and the pot wall into the middle of the pot during the stop stirring time, continue stirring at high speed for 60 seconds and stop;

[0116] 4) The material is taken out and placed in a 40*40*160mm mold, shaken and shaped;

[0117] 5) Curing in an oxidation box at 20°C and 90% humidity;

[0118] 6) At the same time, prepare blank cement mortar for comparativ...

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Abstract

The present invention provides a graphene / cement mortar composite material, including a graphene-based material and a composite material of sand and gravel, cement and water. The present invention changes the adding mode of graphene-based materials, firstly, graphene-based materials and sand and gravel are compounded to obtain a graphene-sand-gravel composite material, and then the treated graphene and sand-gravel composite particles are combined with cement to form a composite material. Cement mortar, to obtain graphene material / cement mortar composite material, can well solve the problem of graphene material dispersion, ensure the perfect performance of its excellent performance, and do not need to add other additives, reduce the introduction of impurities, and fundamentally The problem of uneven mixing of flexible graphene-based materials in the cement system can be solved, and the uniform dispersion of graphene can be ensured. At the same time, graphene-based materials and sand can be compounded to ensure the flat state of graphene-based materials and reduce wrinkles. better performance.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and relates to a graphene / cement mortar composite material and a preparation method thereof, in particular to a graphene-like material / cement mortar composite material and a preparation method thereof. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a planar film composed of carbon atoms with sp2 hybrid orbitals forming a hexagonal honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. As a two-dimensional crystal composed of carbon atoms with only one layer of atomic thickness, it is the thinnest material and the strongest material currently in the application field, and its fracture strength is 200 times higher than that of steel, and it is also very good Excellent elasticity, the stretching range can reach 20% of its own size; at the same time, graphene has a huge theoretical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/024C04B14/06
Inventor 袁琪琛张在忠赵永彬刘海波
Owner SHANDONG OBO NEW MATERIAL CO LTD