Preparation method of graphene modified cement and product thereof

A graphene modification and graphene technology, which is applied in the field of modified cement, can solve the problems of cracks, low tensile strength and toughness of cement, and improve tensile strength and toughness, prevent agglomeration, and improve compressive performance Effect

Active Publication Date: 2021-03-12
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

However, it should also be noted that due to the low tensile strength and toughness of cement, it basically works with cracks for a long time.

Method used

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  • Preparation method of graphene modified cement and product thereof
  • Preparation method of graphene modified cement and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Put 10 g of graphene oxide in 200 mL 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 isobutyl Continue to react with alcohol for 8h, add 0.05mol hydrazine hydrate to continue to react for 6h, then filter, and the resulting product is washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0026] (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 dioxide / polyurethane modified graphene com...

Embodiment 2

[0029] (1) Put 15g of graphene oxide in 150mL N, N-dimethylformamide solution for ultrasonic dispersion, heat to 40°C, add 0.07mol of isophorone diisocyanate under nitrogen atmosphere and react for 12h, then add 0.05mol of isobutyl Continue to react with alcohol for 8h, add 0.7mol hydrazine hydrate to continue to react for 6h, then filter, and the resulting product is washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0030] (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 / polyurethane modified graphene composite material;

[0031] (3) the ...

Embodiment 3

[0033] (1) Put 20g of graphene oxide in 200mL N, N-dimethylformamide solution for ultrasonic dispersion, heat to 50°C, add 0.1mol of isophorone diisocyanate under nitrogen atmosphere and react for 12h, then add 0.05mol of isobutyl Continue to react with alcohol for 8h, add 0.1mol hydrazine hydrate to continue to react for 6h, then filter, and the resulting product is washed, dried, and pulverized to obtain polyurethane-modified graphene;

[0034] (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 / polyurethane modified graphene composite material;

[0035] ...

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Abstract

The invention relates to the technical field of modified cement, and particularly discloses a preparation method of graphene modified cement and a product thereof. The preparation method of the graphene modified cement comprises the following steps of: preparing polyurethane modified graphene from graphene oxide; preparing a polyethylene glycol / titanium dioxide / polyurethane modified graphene composite material by putting polyethylene glycol, tetrabutyl titanate and the prepared polyurethane modified graphene into a solution; dissolving the prepared polyethylene glycol / titanium dioxide / polyurethane modified graphene composite material in water to obtain modified graphene dispersion liquid, and mixing the modified graphene dispersion liquid with cement to obtain the graphene modified cement.The polyurethane graphene oxide is prepared by performing polyurethane modification on the graphene oxide, the dispersing performance of the polyurethane graphene oxide in cement is improved, and then the composite material is prepared by further combining polyethylene glycol and titanium dioxide, so that the stability of the polyurethane graphene oxide in the modified cement is further improved;therefore, the technical purpose of improving the performance of the cement in all aspects by adding the graphene is achieved.

Description

technical field [0001] The invention relates to the technical field of modified cement, in particular to a preparation method of graphene modified cement and a product thereof. Background technique [0002] Cement-based materials are the most used building materials in the world today. It has abundant raw material reserves, simple materials, convenient use, and high compressive strength. In the reinforced concrete structure system, it has the same effect as the steel bars that bear the tensile effect. The close linear shrinkage rate and the good cooperation between the two make cement-based materials occupy a unique position in building materials. However, it should also be noted that due to the low tensile strength and toughness of cement, it basically works with cracks for a long time. The destruction of building structural engineering is largely due to the crack extension of cement-based materials, and the intrusion of carbon dioxide and chloride ions into the interior o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B28/04
CPCC04B40/0039C04B28/04C04B2201/50C04B14/022C04B24/282C04B24/28C04B14/305
Inventor 张贺新闫鑫韩威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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