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Preparation method of three-dimensional porous-graphene-reinforced epoxy resin composite material

A three-dimensional porous, epoxy resin technology, applied in the field of polymer-based composite materials, can solve the problem of air bubbles, affecting the dispersion effect of graphene or graphene oxide, strengthening and toughening effects, and affecting epoxy resin/graphene composite materials Performance and other issues, achieve good mechanical properties and heat resistance, prevent stacking and agglomeration

Inactive Publication Date: 2016-06-08
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method must first consider the compatibility of the solvent of graphene or graphene oxide with the epoxy resin. The epoxy resin usually used is insoluble in water, and its solvent generally includes acetone, chloroform, tetrahydrofuran, dimethylformamide, etc. Organic solvents, bubbles will be generated during the removal of these solvent vapors, which will affect the mechanical properties of the prepared materials
In addition, these organic solvents will also have a certain negative impact on the environment and human health; secondly, in the process of vacuum heating and volatile solvents, the sheets of graphene or graphene oxide will also contact each other and agglomerate, which will affect the graphite. The dispersion effect and strengthening and toughening effect of alkene or graphene oxide in epoxy resin composites will inevitably affect the performance of the prepared epoxy resin / graphene composites.

Method used

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  • Preparation method of three-dimensional porous-graphene-reinforced epoxy resin composite material
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  • Preparation method of three-dimensional porous-graphene-reinforced epoxy resin composite material

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Embodiment 1

[0023] The preparation method of the three-dimensional porous graphene reinforced epoxy resin composite material of the present embodiment is carried out according to the following steps:

[0024] (1) Preparation of a three-dimensional porous graphene film: prepare a graphene oxide dispersion liquid, the graphene oxide dispersion liquid is dimethylformamide and water dispersion liquid of graphene oxide prepared by the Hummers method, wherein the concentration of graphene oxide is 2mg / mL, the volume ratio of dimethylformamide and water is 9:1, the polyethyleneimine aqueous solution with a mass percentage concentration of 15% is evenly coated on the surface of cellulose filter paper, and the filter paper is allowed to stand for 5 minutes. Put it into a container, pour the graphene oxide dispersion liquid into the container, the liquid level of the graphene oxide dispersion liquid is 3mm higher than the upper surface of the filter paper, seal the container and put it into a horizo...

Embodiment 2

[0028] The preparation method of the three-dimensional porous graphene reinforced epoxy resin composite material of the present embodiment is carried out according to the following steps:

[0029] (1) Preparation of three-dimensional porous graphene film: preparation of graphene oxide dispersion liquid, the graphene oxide dispersion liquid is dimethylformamide and water dispersion liquid of graphene oxide prepared by chemical oxidation exfoliation, wherein graphene oxide The concentration is 4mg / mL, the volume ratio of dimethylformamide and water is 5:1, and the polyethyleneimine aqueous solution with a mass percentage concentration of 5% is evenly applied to the surface of cellulose filter paper, and it is left to stand for 5 minutes. Put the filter paper into the container, pour the graphene oxide dispersion liquid into the container, the liquid level of the graphene oxide dispersion liquid is 5mm higher than the upper surface of the filter paper, seal the container and put i...

Embodiment 3

[0033]The preparation method of the three-dimensional porous graphene reinforced epoxy resin composite material of the present embodiment is carried out according to the following steps:

[0034] (1) Preparation of a three-dimensional porous graphene film: prepare a graphene oxide dispersion liquid, the graphene oxide dispersion liquid is dimethylformamide and water dispersion liquid of graphene oxide prepared by the Hummers method, wherein the concentration of graphene oxide is 6mg / mL, the volume ratio of dimethylformamide and water is 1:1, the polyethyleneimine aqueous solution with a mass percent concentration of 40% is evenly coated on the surface of cellulose filter paper, and the filter paper is left to stand for 5 minutes. Put it into a container, pour the graphene oxide dispersion liquid into the container, the liquid level of the graphene oxide dispersion liquid is 8mm higher than the upper surface of the filter paper, seal the container and put it into a horizontal sh...

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Abstract

The invention belongs to the technical field of polymer-base composite materials, and particularly relates to a preparation method of a three-dimensional porous-graphene-reinforced epoxy resin composite material. The preparation method comprises the following steps: assembling graphene oxide sheets onto a filter paper surface by utilizing the electrostatic adsorption actions of positive and negative charges to form a graphene oxide film with a certain thickness, carrying out graphene oxide reduction and polyethyleneimine molecule removal by a hydrothermal process, impregnating the prepared three-dimensional porous graphene film used as a reinforcer into a curing-agent-contained epoxy resin, and carrying out precuring and curing in a drying oven, thereby preparing the heat-resistant reinforced toughened epoxy resin composite material. Compared with the prior art, the method can obviously enhance the properties of the epoxy resin.

Description

technical field [0001] The invention belongs to the technical field of polymer-based composite materials, and in particular relates to a preparation method of a three-dimensional porous graphene-reinforced epoxy resin composite material. Background technique [0002] The existing preparation of graphene or graphene oxide reinforced epoxy resin composites mostly adopts the solution blending method, that is, graphene, graphene oxide or modified graphene oxide is prepared into a certain concentration of dispersion liquid and mixed with epoxy resin , remove the solvent by vacuum heating, add a curing agent, and then cure to prepare an epoxy resin / graphene composite material. [0003] The patent application number is 201010184682.8, and the Chinese patent titled a preparation method of graphene-epoxy resin composite material discloses that epoxy resin and graphene aqueous solution are mixed according to the ratio, the temperature is controlled at 60~120°C, and stirring is carried...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K7/00C08K3/04
CPCC08K3/04C08K7/00C08L2201/08C08L63/00
Inventor 洪晓东姜海艳巩娜张琴
Owner LIAONING TECHNICAL UNIVERSITY