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Preparation process of graphene nanocomposite material

A nanocomposite material and preparation process technology, applied in the field of graphene nanocomposite material preparation process, can solve the problems of unendowed graphene, environmental pollution, etc., and achieve the effect of promoting crosslinking density, enhancing mechanical properties, and preventing stacking

Pending Publication Date: 2020-10-13
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above method, although the hydrophilic graphene improves its dispersion in the polymer composite material, it does not endow the graphene / polymer composite material with other special physical properties, while the functionalized graphene flame retardant imparts high Polymer composites have good flame retardant properties, but because functionalized graphene can only be dispersed in several specific organic solvents, a large amount of organic solvents are used in the use process, and there are environmental pollution problems

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  • Preparation process of graphene nanocomposite material

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Effect test

Embodiment 1

[0043] A kind of graphene nanocomposite preparation technology, comprises the steps:

[0044] In the first step, each raw material is weighed according to the following parts by weight: 50 parts of bisphenol A diglycidyl ether, 11 parts of diethyltoluenediamine, 2 parts of modified graphene oxide, and 100 parts of absolute ethanol;

[0045] In the second step, after mixing bisphenol A diglycidyl ether and diethyltoluenediamine, stir vigorously at 100° C. for 15 minutes to obtain a pale yellow liquid epoxy resin precomposition;

[0046] The third step is to add the epoxy resin premix to absolute ethanol, stir and mix at 300r / min for 26min at room temperature, and then place it in a vacuum oven at 110°C for 30-40min to degas the epoxy resin premix Mixture with ethanol;

[0047] The fourth step is to add the modified graphene oxide to the above-mentioned mixture of epoxy resin premixture and ethanol, ultrasonicate at room temperature for 40 minutes to form a suspension, and then...

Embodiment 2

[0050] A kind of graphene nanocomposite preparation technology, comprises the steps:

[0051] In the first step, each raw material is weighed according to the following parts by weight: 55 parts of bisphenol A diglycidyl ether, 12.5 parts of diethyltoluenediamine, 2.5 parts of modified graphene oxide, and 100 parts of absolute ethanol;

[0052] In the second step, after mixing bisphenol A diglycidyl ether and diethyltoluenediamine, stir vigorously at 100° C. for 16 minutes to obtain a pale yellow liquid epoxy resin precomposition;

[0053] The third step is to add the epoxy resin premix to absolute ethanol, stir and mix at 300r / min for 28min at room temperature, and then place it in a vacuum oven at 110°C for 35min to degas the epoxy resin premix and ethanol. the mixture;

[0054] The fourth step is to add the modified graphene oxide to the above-mentioned mixture of epoxy resin premixture and ethanol, ultrasonicate at room temperature for 45 minutes to form a suspension, and...

Embodiment 3

[0057] A kind of graphene nanocomposite preparation technology, comprises the steps:

[0058] In the first step, each raw material is weighed according to the following parts by weight: 60 parts of bisphenol A diglycidyl ether, 14 parts of diethyltoluenediamine, 3 parts of modified graphene oxide, and 100 parts of absolute ethanol;

[0059] In the second step, after mixing bisphenol A diglycidyl ether and diethyltoluenediamine, stir vigorously at 100° C. for 18 minutes to obtain a pale yellow liquid epoxy resin precomposition;

[0060] The third step is to add the epoxy resin premix to absolute ethanol, stir and mix at 300r / min for 30min at room temperature, and then place it in a vacuum oven at 110°C for 40min to degas the epoxy resin premix and ethanol. the mixture;

[0061] The fourth step is to add the modified graphene oxide to the mixture of the above epoxy resin premix and ethanol, and ultrasonicate at room temperature for 50 minutes to form a suspension, and then plac...

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Abstract

The invention discloses a preparation process of a graphene nanocomposite material. The preparation process comprises the following steps: 1, weighing raw materials; 2, preparing an epoxy resin prepolymer from bisphenol A type diglycidyl ether and diethyltoluenediamine; 3, preparing a mixed solution of an epoxy resin prepolymer and ethanol; 4, adding modified graphene oxide; and 5, conducting curing. According to the invention, epoxy resin is used as a matrix, and modified graphene oxide is added in a pre-compounding stage, so in the process of modifying the graphene oxide, a large number of nanometer SiO2 particles are deposited on a lamellar structure, a -NCO group is introduced into the surface of the material, and the mechanical property and the heat-resistant stability of the nanocomposite material can be remarkably improved; and since the nanometer SiO2 particles are deposited on the lamellar structure of the graphene, so the nanocomposite material can be converted into SiO2 nanosheets with high thermal oxidation stability and high radius-thickness ratio during combustion, and the nanocomposite material has excellent flame retardant property.

Description

technical field [0001] The invention belongs to the field of composite material processing, and in particular relates to a graphene nanocomposite preparation process. Background technique [0002] Nanofillers can significantly improve the flame retardancy of thermosetting resins while improving the mechanical properties, thermal stability and moisture resistance of materials, and have great application prospects. Graphene is a two-dimensional material with a single-layer sheet structure composed of carbon atoms. Its carbon atoms form a hexagonal honeycomb planar structure with sp2 hybrid orbitals. It has a high specific surface area, outstanding mechanical properties, thermal conductivity and Excellent properties such as efficient electron transport. Compared with clay or carbon nanotubes, graphene has both the characteristics of layered structure and carbon atomic structure, and has better potential in the manufacture of high-performance flame-retardant materials. [0003...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08K13/06C08K3/04C08K9/04C08K9/06C08K9/12C08K3/36B82Y30/00B82Y40/00
CPCC08K13/06C08K3/042C08K9/04C08K9/06C08K9/12C08K3/36B82Y30/00B82Y40/00C08L2201/02C08L2201/08C08K2201/011C08L63/00
Inventor 褚克田野郭亚莉魏珍屈文欢
Owner LANZHOU JIAOTONG UNIV
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