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A kind of preparation method and product of graphene modified pitch

A graphene modification and graphene technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of graphene being unable to disperse evenly, adding graphene, and graphene being unable to modify the effect of asphalt, so as to reduce ultraviolet rays Good effects of aging, high phase change enthalpy, thermal stability and crystallization properties

Active Publication Date: 2022-04-12
马鞍山皖烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene is a nano-material with huge specific surface area and super surface activity. Experiments have proved that adding graphene to asphalt can have a special effect on the physical and chemical properties of asphalt, thereby improving the performance of asphalt; however, in In actual production, it is impossible to directly add graphene to asphalt: the reason is that graphene has a serious agglomeration problem in asphalt, which makes it impossible to disperse evenly, so that graphene cannot modify asphalt very well

Method used

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  • A kind of preparation method and product of graphene modified pitch
  • A kind of preparation method and product of graphene modified pitch

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Place 10 g of graphene oxide in 200 mL of N,N-dimethylformamide solution for ultrasonic dispersion, heat to 55°C, add 0.05 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol was continued to react for 8 hours, and 0.05mol hydrazine hydrate was added to continue to react for 6 hours, then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0027] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene at a mass ratio of 1:1:3 and place them in an ethanol solution for ultrasonic dispersion, use hydrochloric acid to adjust the pH of the solution to 4, and place them in a water bath at 45°C After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 9, let it stand and age for 24 hours, filter and dry to obtain a polyethylene glycol / titanium ...

Embodiment 2

[0030] (1) Place 15 g of graphene oxide in 150 mL of N,N-dimethylformamide solution and disperse uniformly by ultrasonic, then heat to 40°C, add 0.07 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol continued to react for 8 hours, added 0.7mol hydrazine hydrate to continue to react for 6 hours, and then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0031] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene in an ethanol solution at a mass ratio of 1:0.5:5 for ultrasonic dispersion, use hydrochloric acid to adjust the pH of the solution to 5, and place in a 50°C water bath After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 10, leave it to age for 48 hours, filter and dry to obtain a polyethylene glycol / titanium dioxide / polyuretha...

Embodiment 3

[0034] (1) Place 20 g of graphene oxide in 200 mL of N,N-dimethylformamide solution and disperse uniformly by ultrasonic, then heat to 50°C, add 0.1 mol of isophorone diisocyanate under nitrogen atmosphere and react for 12 hours, then add 0.05 mol of isophorone diisocyanate Butanol continued to react for 8 hours, added 0.1mol hydrazine hydrate and continued to react for 6 hours, then filtered, and the resulting product was washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0035] (2) Take polyethylene glycol, tetrabutyl titanate, and polyurethane-modified graphene in an ethanol solution at a mass ratio of 2:1:3 for ultrasonic dispersion, and use hydrochloric acid to adjust the pH of the solution to 4, and place them in a 50°C water bath After hydrolysis for 4 hours under ambient conditions, use sodium hydroxide to adjust the pH value of the solution to 9, let it stand and age for 48 hours, filter and dry to obtain polyethylene glycol / titanium dioxide / poly...

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Abstract

The invention relates to the technical field of modified asphalt, in particular to a preparation method of graphene-modified asphalt and a product thereof. The preparation method of the graphene-modified asphalt comprises; first prepare polyurethane-modified graphene from graphene oxide, and then further prepare polyethylene glycol / titanium dioxide / polyurethane-modified graphene composite material; heat the asphalt to molten state, add The obtained polyethylene glycol / titanium dioxide / polyurethane-modified graphene composite material is obtained, and the graphene-modified asphalt is obtained by high-speed shearing. The present invention prepares polyurethane graphene oxide by modifying graphene with polyurethane, improves its dispersion performance in asphalt, and then further combines polyethylene glycol and titanium dioxide to prepare composite materials, further improving the thermal stability of modified asphalt, thereby avoiding asphalt Rutting, oil flooding, potholes, cracks and other diseases on the road surface caused by excessively high or low ambient temperature.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, in particular to a preparation method of graphene-modified asphalt and a product thereof. Background technique [0002] Asphalt material is one of the most important basic construction materials. Due to its good viscoelasticity, asphalt has been widely used in the field of construction, especially in road construction projects. It is mainly used as a bonding material for the surface layer or a flexible base layer. At present, most of the roads at home and abroad are asphalt pavement. However, at high temperatures, bitumen tends to melt and flow. As a result, the asphalt pavement is prone to various rutting, oil flooding, potholes and other diseases due to the high temperature of the pavement during the high temperature season, which seriously affects the normality of the asphalt pavement. Therefore, it is necessary to modify asphalt to improve and enhance its road performance to meet t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L71/02C08K9/04C08K3/04C08K3/22
CPCC08L95/00C08K2003/2241C08L2201/08C08L71/02C08K9/08C08K3/042C08K3/22
Inventor 张贺新韩威闫鑫解翰林张晗张天帅张奎夏友谊宋志健万玉保林鹏高宏
Owner 马鞍山皖烯新材料科技有限公司
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