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Preparation method of modified graphene oxide and method for preparing epoxy resin composite material by using modified graphene oxide

A composite material and epoxy resin technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high brittleness and poor impact toughness of epoxy resin, and achieve improved elongation at break and toughness , Improve the effect of nano-enhanced effect

Pending Publication Date: 2021-11-30
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a modified graphene oxide epoxy nanocomposite material with excellent comprehensive properties to solve the problems of high brittleness of epoxy resin and poor impact toughness.

Method used

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  • Preparation method of modified graphene oxide and method for preparing epoxy resin composite material by using modified graphene oxide
  • Preparation method of modified graphene oxide and method for preparing epoxy resin composite material by using modified graphene oxide
  • Preparation method of modified graphene oxide and method for preparing epoxy resin composite material by using modified graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of aminated graphene oxide

[0043] Weigh 30g of 3-aminopropyltriethoxysilane, 108g of ethanol and 12g of water into a 250ml three-necked flask and stir for 10-15min, then add 1.5g of graphene oxide and sonicate for 1-1.5h. It was reacted at 60° C. for 6 hours, and after cooling to room temperature, the slurry reaction mixture was centrifuged and washed with ethanol and distilled water to remove residual 3-aminopropyltriethoxysilane and achieve neutrality. Finally, freeze-dry and collect the resulting product. Infrared spectroscopy of the reactant graphene oxide, see figure 1 Middle a curve, 910cm -1 The absorption peak at is the epoxy group absorption peak, which can prove that the reactant used in the experiment is graphene oxide. The above-mentioned reaction product is carried out the spectroscopic test of infrared, see appendix figure 1 Middle b curve, 1027cm -1 The absorption peak at is the absorption peak of C-O-Si, indicating that the silane ...

Embodiment 2

[0056] (1) Preparation of aminated graphene oxide

[0057] Weigh 30g of 3-aminopropyltriethoxysilane, 108g of ethanol and 12g of water into a 250ml three-necked flask and stir for 10-15min, then add 1.5g of graphene oxide and sonicate for 1-1.5h. It was reacted at 60° C. for 6 hours, and after cooling to room temperature, the slurry reaction mixture was centrifuged and washed with ethanol and distilled water to remove residual 3-aminopropyltriethoxysilane and achieve neutrality. Finally, freeze-dried and collected to obtain aminated graphene oxide.

[0058] (2) Preparation of bromine-terminated graphene oxide

[0059] Weigh 1.5g of aminated graphene oxide and 100ml of toluene into a 250ml three-necked flask, add 0.3g of 4-dimethylaminopyridine, 0.5ml of triethylamine, ice bath for 30min, slowly add 4ml of 2- bromoisobutyryl bromide, then the reaction mixture was stirred at room temperature for 24h. After the reaction, wash with excess acetone / water solution (v / v, 1 / 1) and t...

Embodiment 3

[0069] (1) Preparation of aminated graphene oxide

[0070] Weigh 30g of 3-aminopropyltriethoxysilane, 108g of ethanol and 12g of water into a 250ml three-necked flask and stir for 10-15min, then add 1.5g of graphene oxide and sonicate for 1-1.5h. It was reacted at 60° C. for 6 hours, and after cooling to room temperature, the slurry reaction mixture was centrifuged and washed with ethanol and distilled water to remove residual 3-aminopropyltriethoxysilane and achieve neutrality. Finally, freeze-dried and collected to obtain aminated graphene oxide.

[0071] (2) Preparation of bromine-terminated graphene oxide

[0072] Weigh 1.5g of aminated graphene oxide and 100ml of toluene into a 250ml three-necked flask, add 0.3g of 4-dimethylaminopyridine, 0.5ml of triethylamine, ice bath for 30min, slowly add 4ml of 2- bromoisobutyryl bromide, then the reaction mixture was stirred at room temperature for 24h. After the reaction, wash with excess acetone / water solution (v / v, 1 / 1) and t...

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Abstract

The invention relates to the field of composite materials, and in particular, relates to a preparation method of modified graphene oxide and a method for preparing an epoxy resin composite material by applying the modified graphene oxide. The preparation method of the modified graphene oxide comprises the following steps: 1, preparing aminated graphene oxide; 2, further preparing bromine-terminated graphene oxide; 3, preparing a monomer containing a catechol group; 4, preparing an intermediate product from the bromine-terminated graphene oxide and a monomer containing a catechol group; and 5, reacting the intermediate product with tetrabutylammonium fluoride to obtain the modified graphene oxide containing the catechol group. The preparation method of the epoxy resin composite material comprises the following steps: adding the modified graphene oxide into the epoxy resin, uniformly stirring and mixing, performing ultrasonic dispersion, adding the curing agent, uniformly stirring and mixing, performing vacuum drying, removing bubbles, and pouring into a mold for curing and molding. According to the modified graphene oxide prepared by the method provided by the invention, the compatibility with an epoxy resin matrix can be improved by low-dosage addition, and the mechanical property of an epoxy nano composite material can also be improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a preparation method of modified graphene oxide and a method for preparing epoxy resin composite materials by using the modified graphene oxide. Background technique [0002] As an important thermosetting resin, epoxy resin has excellent physical and mechanical properties, electrical insulation, chemical corrosion resistance, heat resistance and adhesive properties and excellent molding process, and is widely used in chemical industry, automobile, electronics, Mechanical and aerospace fields. With the rapid development of modern material science and technology, higher and higher requirements are put forward for epoxy resin, and its development trend is developing in the direction of multi-functionality, refinement and high performance. Among them, epoxy resin, as one of the most important high-performance composite matrix resins, has extremely important application value in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C08K3/04C08K9/04C08K9/06
CPCC01B32/198C08K9/04C08K9/06C08K3/042C08K2201/011C08L63/00
Inventor 敖玉辉杨国瑞尚垒庄海林宁臣孔令强张春红
Owner CHANGCHUN UNIV OF TECH
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