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A graphene microchip masterbatch for road asphalt modification and preparation method thereof

A kind of technology of graphene micro-sheet and master batch

Active Publication Date: 2019-05-24
南通永诚惠海建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty in dispersing network graphene, the existing technology has not effectively solved the problem of network graphene dispersion in asphalt.

Method used

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  • A graphene microchip masterbatch for road asphalt modification and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Mix 500 parts by weight of expanded graphite powder and 40 parts by weight of asphalt emulsion evenly, and send them into the first stage of the double-stage co-rotating twin-screw extruder, set the screw temperature to 60-80°C, and the first stage of the screw machine The shearing section, the gel section, and the devolatilization section are set in sequence from the feed end to the discharge end; in the shear section, the asphalt emulsion peels the expanded graphite powder into graphene micro-sheets under the shearing action of the screw; in the gel section By introducing citric acid to control the pH value at 4-5, the asphalt emulsion is gelled, and the graphene microsheets are connected to form a network structure through the asphalt gelation; in the devolatilization section, the volatile matter is discharged and collected through the vacuum port; The asphalt emulsion described therein is obtained by grinding and dispersing isopropanol, petroleum asphalt, and imi...

Embodiment 2

[0040] (1) Mix 55 parts by weight of expanded graphite powder and 50 parts by weight of asphalt emulsion evenly, and send them into the first stage of the double-stage co-rotating three-screw machine, set the screw temperature to 60-80°C, and the first stage of the screw machine is composed of From the feed end to the discharge end, a shear section, a gel section, and a devolatilization section are arranged in sequence; in the shear section, the asphalt emulsion is exfoliated into graphene micro-sheets under the shearing action of the screw; in the gel section, by introducing The acid-base regulator controls the pH value at 5 to make the asphalt emulsion gel, forming a network structure connected by graphene microsheets; in the volatilization section, the volatile matter is discharged and collected through the vacuum port provided; the asphalt emulsion is made of It is obtained by grinding and dispersing isopropanol, synthetic asphalt, and imidazoline at a mass ratio of 10:3:0....

Embodiment 3

[0044] (1) Mix 60 parts by weight of expanded graphite powder and 50 parts by weight of asphalt emulsion evenly, and send them into the first stage of the two-stage screw machine, set the screw temperature at 60-80°C, and the first stage of the screw machine is from the feed end to the The discharge end is provided with a shear section, a gel section, and a devolatilization section in turn; in the shear section, the asphalt emulsion is exfoliated into graphene micro-sheets under the shearing action of the screw; in the gel section, the acid-base regulator is introduced Control the pH value at 4 to gel the asphalt emulsion, forming a network structure connected by graphene microsheets; in the devolatilization section, the volatile matter is discharged and collected through the vacuum port;

[0045] (2) The material obtained in step (1) is continuously sent to the second stage of the two-stage screw machine, and the screw temperature is set to 120°C. The second stage of the screw...

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Abstract

The invention relates to the field of a graphene material, in particular to a graphene microchip master batch for road asphalt modification. The graphene microchip master batch uses expansion graphite powder as major raw materials; the graphene microchip connection reticular structure is formed through the peeling of the expansion graphite in the asphalt emulsion and the gelation; the granulation is further performed with plasticizing agents to obtain the graphene microchip master batch. The graphene microchip master batch has good dispersivity in the pavement asphalt and good winding connection performance with the pavement asphalt; the pavement asphalt realizes high elasticity, high intensity, high-temperature track resistance and low-temperature cracking resistance; the pavement intensity requirements can still be met when the pavement asphalt is thinned for 30 percent. The invention further provides a preparation method for continuously preparing the graphene microchip master batch by a double-stage screw rod machine.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to the application of graphene materials, in particular to a graphene microchip masterbatch applied to road asphalt modification. Background technique [0002] With the rapid development of urbanization, traffic requirements are getting higher and higher. Especially highways and urban roads have higher and higher requirements on the performance of the road surface. The road structure in our country has developed from the traditional gravel road to the asphalt road with good driving comfort and easy maintenance. Modified asphalt pavement is applied to the road surface by mixing finely ground rubber powder or other fillers and asphalt evenly, so that the road surface has the characteristics of noise reduction, easy maintenance, fast construction, and comfort. However, in use, the composition and structure of asphalt itself determine its poor temperature sensitivity, easy to flow at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L93/04C08L45/02C08L91/06C08K13/04C08K7/24C08J3/22B29B9/06
CPCB29B9/06C08J3/226C08J2395/00C08J2495/00C08L95/00C08L95/005C08L2201/08C08L2205/02C08L2205/03C08L93/04C08L45/02C08L91/06C08K13/04C08K7/24
Inventor 陈庆曾军堂
Owner 南通永诚惠海建设工程有限公司
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