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Modified graphene based composite asphalt modifier and preparation method and application of modified graphene based composite asphalt modifier

A technology of composite asphalt and modified asphalt, applied in building components, building thermal insulation materials, buildings, etc., can solve the problems of low stability, poor dispersibility, and decreased plasticity, achieve improved dispersibility and stability, and improved durability. High, elastic performance improvement effect

Active Publication Date: 2018-06-05
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above achievements are not enough to fully reveal the advantages of GNPs, they have already shown the advantages of GNPs composite materials and their great application potential in the engineering field. Problems, such as the improvement of anti-rutting performance and elastic performance of asphalt after modification are not obvious, and the plasticity of asphalt modified by GNPs / SBS at low temperature decreases, and the dispersion is poor and the stability is low, which is not conducive to the development of composite materials. application

Method used

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  • Modified graphene based composite asphalt modifier and preparation method and application of modified graphene based composite asphalt modifier
  • Modified graphene based composite asphalt modifier and preparation method and application of modified graphene based composite asphalt modifier
  • Modified graphene based composite asphalt modifier and preparation method and application of modified graphene based composite asphalt modifier

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Embodiment 1

[0043] (1) Add 1 g of natural graphite flakes into a beaker, and add 24 mL of concentrated sulfuric acid (with a density of 1.836 g / cm3 ) and 12mL concentrated nitric acid (density 1.420g / cm 3 ), magnetically stirred for 10min to disperse evenly, to prevent graphite agglomeration, after uniform dispersion, slowly add 3gKMnO 4 , and kept stirring in an ice-water bath for 2 hours, the solution was dark green at this time;

[0044] (2) After raising the temperature of the solution obtained in (1) to 25°C and stirring for 30 minutes, slowly add 100 mL of deionized water to it, and raise the temperature to 80°C and stir for 10 minutes;

[0045] (3) Pour the solution in (2) into 200mL of deionized water at a temperature of 60°C, and add 10mL of H 2 o 2 (35%wt), the solution turned golden yellow. Put the solution for several times to collect the solid by suction filtration, add 15mL of 5% hydrochloric acid and dilute it with deionized water. After stirring evenly, the solution tur...

Embodiment 2

[0053] (1) 2g of natural flake graphite was added to a beaker, and 48mL of concentrated sulfuric acid (with a density of 1.836g / cm 3 ) and 24mL concentrated nitric acid (density 1.420g / cm 3 ), magnetically stirred for 20min to disperse evenly, to prevent graphite agglomeration, after uniform dispersion, slowly add 6gKMnO 4 , and kept stirring in an ice-water bath for 3 hours, the solution was dark green at this time;

[0054] (2) After the solution described in (1) was heated to 30°C and stirred for 45 minutes, 200 mL of deionized water was slowly added thereto, and the temperature was raised to 85°C and stirred for 25 minutes;

[0055] (3) Pour the solution in (2) into 300mL of deionized water at a temperature of 60°C, and add 20mL of H 2 o 2 (35%wt), the solution turns golden yellow, the solution is left to stand for several times to collect the solid by suction filtration, 30mL of 5% hydrochloric acid is added and the collected solid is diluted with deionized water, and ...

Embodiment 3

[0063] (1) 3g of natural flake graphite was added to a beaker, and 72mL of concentrated sulfuric acid (with a density of 1.836g / cm 3 ) and 36mL concentrated nitric acid (density 1.420g / cm 3 ), magnetically stirred for 30min to disperse evenly, to prevent graphite agglomeration, after uniform dispersion, slowly add 9gKMnO 4 , and kept stirring in an ice-water bath for 4 hours, the solution was dark green at this time;

[0064] (2) After the solution described in (1) was heated to 35°C and stirred for 60 minutes, 300 mL of deionized water was slowly added thereto, and the temperature was raised to 90°C and stirred for 30 minutes;

[0065] (3) Pour the solution in (2) into 400mL60°C deionized water, and add 30mLH 2 o 2 (35%wt), the solution turns golden yellow, the solution is left to stand for several times to collect the solid by suction filtration, adds 45mL of 5% hydrochloric acid and dilutes the collected solid with deionized water, the solution becomes light green after ...

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Abstract

The invention discloses a modified graphene based composite asphalt modifier. The modified graphene based composite asphalt modifier is prepared from modified graphene and an SBS (Styrene Butadiene Styrene) modifier; the modified graphene is prepared by adding a styrene monomer and lauryl sodium sulfate into an oxidized graphene microchip solution, conducting ultrasonic concussion on the obtainedmixed solution, adding potassium peroxodisulfate, reacting in an oil bath, then adding hydrazine hydrate, raising the temperature to 100 DEG C at the same time, reacting for 4-6 hours, cooling, filtering through a microfiltration membrane, washing and drying. The invention further discloses a preparation method and application of the modified graphene based composite asphalt modifier. The high-and-low temperature performance and the plastic property of the modified asphalt prepared by using the composite asphalt modifier are obviously improved, the anti-rutting performance and the elastic property are greatly improved, the defects of not high durability and not good high temperature property of the SBS modified asphalt are effectively improved, and compared with the graphene microchip notmodified, the dispersibility and the stability of the modified graphene microchip in the asphalt are greatly improved.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, in particular to a composite asphalt modifier based on modified graphene and its preparation method and application. Background technique [0002] About 90% of highways and roads in China and the United States are paved with asphalt mixture, and SBS (polystyrene-butadiene-styrene) modified asphalt accounts for more than 80% of the usage, but SBS modified asphalt has disadvantages such as low durability and low strength. Many experts and scholars are committed to improving the performance of asphalt roads by adding other materials to prepare asphalt composite materials. The main direction of effort is to develop new asphalt roads with better mechanical properties. Material. Recently, with the development of nanotechnology, scholars tend to use nanotechnology to play an important role in improving the sustainability and elasticity of road materials in the process of material processing th...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08K9/04C08K9/02C08K3/04C08L95/00
CPCC08K3/04C08K9/02C08K9/08C08L95/00C08L2201/08C08L53/02
Inventor 李晶韩美钊段少婵杨静杨耸
Owner GUANGXI UNIV
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