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Modified graphene oxide and epoxy resin composite material and method for preparing same

An epoxy resin and composite material technology, which is applied in the field of modified graphene oxide and epoxy resin composite materials containing the modified graphene oxide, can solve problems such as incompatibility, improve tensile mechanical strength, overcome Compatibility issues, overcoming lower performance effects

Active Publication Date: 2016-08-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the large number of hydrophilic groups on the surface of graphene oxide, it is incompatible with most water-insoluble polymers.

Method used

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  • Modified graphene oxide and epoxy resin composite material and method for preparing same
  • Modified graphene oxide and epoxy resin composite material and method for preparing same
  • Modified graphene oxide and epoxy resin composite material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1 Preparation of polyetheramine-modified graphene oxide of the present invention

[0056] 1. Preparation of graphene oxide solution (powder)

[0057] Using natural graphite powder as raw material, graphene oxide was prepared according to the Hummers method, as follows: 2g of graphite powder was added to a 250mL beaker, and 1g of NaNO 3 , slowly add 46mL concentrated sulfuric acid and stir evenly, place the beaker in an ice-water bath, slowly add 6gKMnO 4 , the process temperature should not exceed 20°C. After 5 minutes, the ice-water bath was removed, and the temperature was raised to 35°C for 30 minutes. Add 92 mL of deionized water, stir for 15 minutes, and then add 80 mL of 3% H at 60 °C 2 o 2 solution to reduce excess KMnO 4 , until there are no obvious bubbles. Finally, centrifuge at 7200rpm for 30 minutes, pour out the supernatant, wash with water and then centrifuge, repeat several times until the pH of the supernatant is 4-6, and the obtained yello...

Embodiment 2

[0066] Embodiment 2 Preparation and properties of the composite material of the present invention

[0067] 1. Preparation of composite materials

[0068] Preparation of nanocomposite EP / DGO: Weigh a certain amount (0.1phr) of modified graphene oxide DGO and disperse it in acetone solution at a ratio of 1mg / mL, ultrasonicate for 30min, add 50g of epoxy resin to the modified graphite oxide In the acetone solution of alkenes, adjust the temperature of the oil bath to 60°C, and continue electric stirring for 30min. After the graphene oxide and epoxy resin are fully mixed, put them into a vacuum oven at a temperature of 80°C for 24 hours to remove the solvent. Add 12.5g of curing agent DDM (4,4-diaminodiphenylmethane) into the beaker, continue to stir for 2-3min and then stop, then take out the beaker. Then place the beaker in a vacuum oven and vacuum to remove air bubbles. Finally, the obtained mixed liquid was poured into a polytetrafluoroethylene mold of a standard spline, an...

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Abstract

The invention discloses a modified graphene oxide and epoxy resin composite material and a method for preparing the same. The modified graphene oxide and epoxy resin composite material and the method have the advantages that graphene oxide is modified by the aid of polyether amine to obtain novel polyether amine modified graphene oxide materials, and accordingly the problems in the aspect of dispersibility of graphene in polymer matrixes can be effectively solved; as proved by test results, the tensile mechanical strength, the toughness and the bending strength of epoxy resin materials can be simultaneously greatly improved by the added polyether amine modified graphene oxide while the glass transition temperatures of the epoxy resin materials is increased by the added polyether amine modified graphene oxide, enhancement effects of the epoxy resin materials are superior to enhancement effects of epoxy resin materials with unmodified graphene oxide, and accordingly the modified graphene oxide and epoxy resin composite material and the method have broad market application prospects.

Description

technical field [0001] The invention relates to a modified graphene oxide, an epoxy resin composite material containing the modified graphene oxide, and a preparation method thereof. Background technique [0002] Graphene is an ideal inorganic filler for the preparation of polymer nanocomposites due to its excellent mechanical, electrical and thermal properties. However, the surface of graphene is inert and does not contain any active groups, so the force between it and the polymer matrix is ​​very small, which also causes certain difficulties in processing. Since the surface of graphene oxide is rich in carboxyl groups, hydroxyl groups, and epoxy groups, graphene can be modified by various chemical reactions using these active groups as reaction points. Therefore, using graphene oxide as a precursor to prepare covalent Modified graphene is currently the most commonly used method. [0003] However, due to the large number of hydrophilic groups on the surface of graphene ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/04C08L63/00
CPCC08K3/04C08K9/08C08K2201/011C08L63/00
Inventor 邹华维李乐周娅梁梅陈洋
Owner SICHUAN UNIV
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