Oxidized graphene modified asphalt and preparation method thereof

A graphene modification, graphene technology, applied in building components, building insulation materials, buildings and other directions, can solve the problems of low elastic modulus, road cracking, easy oxidation and aging of asphalt pavement, etc., to achieve comprehensive performance improvement, road use Long life and effect of improving anti-aging properties

Active Publication Date: 2019-03-01
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, asphalt pavement also faces many problems, for example, its low elastic modulus and high viscosity modulus in summer lead to road rutting, and its low elastic modulus and high viscosity modulus in winter lead to pavement cracking; in addition, the easy oxidation and aging of asphalt pavement is also a problem. neglected problem

Method used

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  • Oxidized graphene modified asphalt and preparation method thereof
  • Oxidized graphene modified asphalt and preparation method thereof
  • Oxidized graphene modified asphalt and preparation method thereof

Examples

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Comparison scheme
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Embodiment 1

[0041] A graphene oxide modified asphalt of the present invention, the graphene oxide modified asphalt comprises the following parts by weight of raw materials: 100 parts of asphalt, 0.17 parts of graphite, 38.19 parts of mixed acid, 0.93 parts of potassium permanganate, 11.89 parts of hydrogen peroxide . Among them, graphite is natural graphite with a particle size of -160 mesh; potassium permanganate has a particle size of -100 mesh; and the mixed acid is formed by mixing 34.72 parts of concentrated sulfuric acid and 3.47 parts of concentrated phosphoric acid.

[0042] The preparation method of graphene oxide modified asphalt of this embodiment includes the following steps:

[0043] (1) Slowly add graphite to the mixed acid and stir evenly to obtain the mixed material;

[0044] (2) Place the mixture after step (1) in a heat-collecting magnetic stirrer, turn on the stirring, the stirring speed is 20rpm, the stirring temperature is 50°C, slowly add potassium permanganate to the mixt...

Embodiment 2

[0049] A graphene oxide modified asphalt of the present invention includes the following raw materials in parts by weight: 100 parts of asphalt, 0.34 parts of graphite, 76.38 parts of mixed acid, 1.86 parts of potassium permanganate, and 23.78 parts of hydrogen peroxide . Among them, the pitch used is No. 70 pitch; graphite is natural graphite with a particle size of -160 mesh; potassium permanganate has a particle size of -100 mesh; the mixed acid is made by mixing 69.44 parts of concentrated sulfuric acid and 6.94 parts of concentrated phosphoric acid.

[0050] The preparation method of graphene oxide modified asphalt of this embodiment includes the following steps:

[0051] (1) Slowly add graphite to the mixed acid and stir evenly to obtain the mixed material;

[0052] (2) Place the mixture after step (1) in a heat-collecting magnetic stirrer, turn on the stirring, the stirring speed is 20rpm, the stirring temperature is 50°C, slowly add potassium permanganate to the mixture, and...

Embodiment 3

[0057] A graphene oxide modified asphalt of the present invention includes the following raw materials in parts by weight: 100 parts of asphalt, 0.34 parts of graphite, 76.38 parts of mixed acid, 1.86 parts of potassium permanganate, and 23.78 parts of hydrogen peroxide . Among them, the pitch used is No. 70 pitch; graphite is natural graphite with a particle size of -200 mesh; the particle size of potassium permanganate is -140 mesh; the mixed acid is made by mixing 69.44 parts of concentrated sulfuric acid and 6.94 parts of concentrated phosphoric acid.

[0058] The preparation method of graphene oxide modified asphalt of this embodiment includes the following steps:

[0059] (1) Slowly add graphite to the mixed acid and stir evenly to obtain the mixed material;

[0060] (2) Put the mixture after step (1) in a heat-collecting magnetic stirrer, turn on the stirring, the stirring rate is 30rpm, the stirring temperature is 50℃, slowly add potassium permanganate to the mixture, and co...

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Abstract

The invention provides a preparation method of oxidized graphene modified asphalt. The preparation method includes following steps: slowly adding graphite into mixed acid, and well stirring to obtaina mixed material; during stirring, slowly adding potassium permanganate into the mixed material, and continuously stirring for reaction to obtain an oxidized mixed material; slowly adding hydrogen peroxide into the oxidized mixed material, continuously stirring for reaction to obtain an oxidized mixed solution; cooling the oxidized mixed solution to room temperature, performing ultrasonic treatment, and performing centrifugal separating and washing to obtain oxidized graphene mother liquid; adding the oxidized graphene mother liquid into asphalt, heating to fusion, and shearing to obtain the oxidized graphene modified asphalt. The invention further provides the oxidized graphene modified asphalt prepared by the method. The oxidized graphene modified asphalt is a stripped oxidized graphene / asphalt composite material and has excellent high-temperature stability, low-temperature crack resistance and thermo-oxidative aging resistance.

Description

Technical field [0001] The invention belongs to the technical field of modified asphalt, and particularly relates to a graphene oxide modified asphalt and a preparation method thereof. Background technique [0002] Graphene plays a very important role in nanomaterials due to its excellent physical and electrical properties, and it can significantly improve the properties of polymers. An important factor restricting the wide application and industrial production of graphene is how to prepare single-layer or few-layer graphene materials with processability on a large scale. At present, common graphene production methods include mechanical exfoliation, epitaxial growth, chemical vapor deposition, and graphene oxide reduction. Although the mechanical exfoliation method can produce large-scale, high-quality graphene, it is time-consuming and labor-intensive, and the yield and the single-layer rate of graphene in the product are extremely low, making it impossible to produce graphene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K7/00C08K3/04C04B26/26
CPCC04B26/26C08K3/042C08K7/00C08L2201/08C08L95/00
Inventor 刘其城曾清刘鹏
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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