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Method for modifying epoxy resin by using amphiphilic copolymer modified graphene

A technology of graphene modification and epoxy resin, which is applied in the preparation of graphene/epoxy resin composite materials, the surface modification and dispersion of graphene, which can solve the problem of graphene's easy aggregation and poor dispersion performance, and its inability to exert its superiority Performance and other issues, to achieve the effect of easy mass production, high yield, and wide process window

Active Publication Date: 2014-05-28
沛县度创科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing graphene is easy to aggregate and have poor dispersion performance, and cannot exert its superior performance, the present invention provides a graphene surface modification and its dispersion method in epoxy resin. The method synthesizes a A new type of amphiphilic polymer to modify graphene, the polymer contains both carbazole groups and epoxy groups, the strong π-π stacking interaction between the carbazole group and graphene promotes the polymer to be adsorbed on graphite Graphene surface, and the epoxy group can enhance the compatibility of graphene and epoxy resin

Method used

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  • Method for modifying epoxy resin by using amphiphilic copolymer modified graphene
  • Method for modifying epoxy resin by using amphiphilic copolymer modified graphene

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Embodiment 1

[0015] In the first step, stir and dissolve 0.5g of glycidyl methacrylate, 0.5g of vinyl carbazole, and 0.01g of azobisisobutyronitrile in 20mL of tetrahydrofuran, and pass through N 2 5min-30min, sealed, reacted at 70°C for 12h, precipitated after the reaction, dried in a vacuum oven at 20-80°C to obtain the amphiphilic copolymer.

[0016] In the second step, 0.1 g of graphene oxide and 1 g of amphiphilic copolymer were dispersed in tetrahydrofuran, hydrazine hydrate was added, reacted at 70 ° C for 12 h, cooled and centrifuged, and black powder was obtained after drying, which was amphiphilic copolymer modified graphene.

[0017] In the third step, the amphiphilic copolymer modified graphene is finally added to the bisphenol A epoxy resin (E51), decompressed and pumped, and the hexahydrophthalic anhydride curing agent is added to mix evenly and then poured into the mold, wherein the epoxy resin , curing agent and amphiphilic polymer-modified graphene in a weight ratio of 100...

Embodiment 2

[0019] In the first step, stir and dissolve 0.5g glycidyl methacrylate, 1g vinyl carbazole, and 0.015g azobisisobutyronitrile in 20mL tetrahydrofuran, pass N 2 5min-30min, sealed, reacted at 70°C for 12h, precipitated after the reaction, dried in a vacuum oven at 20-80°C to obtain the amphiphilic copolymer.

[0020] In the second step, 0.1 g of graphene oxide and 0.5 g of amphiphilic copolymer were dispersed in tetrahydrofuran, hydrazine hydrate was added, reacted at 70 ° C for 12 h, cooled and centrifuged, and black powder was obtained after drying, which was amphiphilic copolymer modified graphene.

[0021] In the third step, the amphiphilic copolymer modified graphene is finally added to the bisphenol A epoxy resin (E51), decompressed and pumped, and the tetrahydrophthalic anhydride curing agent is added to mix evenly and then poured into the mold, wherein the epoxy resin , curing agent and amphiphilic polymer-modified graphene in a weight ratio of 100:95:1, fully mixed and...

Embodiment 3

[0023] In the first step, stir and dissolve 0.5g glycidyl methacrylate, 1g vinyl carbazole, and 0.015g azobisisobutyronitrile in 20mL tetrahydrofuran, pass N 2 5min-30min, sealed, reacted at 70°C for 12h, precipitated after the reaction, dried in a vacuum oven at 20-80°C to obtain the amphiphilic copolymer.

[0024] In the second step, 0.1 g of graphene oxide and 0.5 g of amphiphilic copolymer were dispersed in tetrahydrofuran, hydrazine hydrate was added, reacted at 70 ° C for 12 h, cooled and centrifuged, and black powder was obtained after drying, which was amphiphilic copolymer modified graphene.

[0025] In the third step, the amphiphilic copolymer modified graphene is finally added to the bisphenol A epoxy resin (E51), decompressed and pumped, and the hexahydrophthalic anhydride curing agent is added to mix evenly and then poured into the mold, wherein the epoxy resin , curing agent and amphiphilic polymer-modified graphene in a weight ratio of 100:95:0.5, fully mixed an...

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Abstract

The invention discloses a method for modifying epoxy resin by using amphiphilic copolymer modified graphene. The method comprises the steps of preparing a graphene oxide from graphene serving as a raw material by adopting a Hummers oxidation method; polymerizing glycidyl methacrylate and vinylcarbazole by adopting a free radical polymerization method to obtain an amphiphilic polymer; dispersing the graphene oxide and the amphiphilic polymer into a solvent together, adding hydrazine hydrate, and reducing to obtain the amphiphilic copolymer modified graphene. The operation process is simple and convenient, and the amphiphilic copolymer modified graphene is easily synthesized in large batch. The prepared amphiphilic copolymer modified graphene has good dispersion performance in the epoxy resin, and can significantly improve the toughness of the epoxy resin. The mechanical properties of a graphene / epoxy resin composite material prepared by the method disclosed by the invention are greatly improved, wherein the tensile property is improved by over 30%, and the bending property is improved by over 50%.

Description

technical field [0001] The invention relates to a surface modification and dispersion technology of graphene, which belongs to the field of preparation of composite materials of graphene surface modification and its dispersion method in epoxy resin, in particular to a graphene / ring Preparation method of oxygen resin composite material. Background technique [0002] Graphene has been a research hotspot all over the world since it was successfully prepared in 2004. The strength of graphene is currently known as the highest strength material in the world, reaching 130Gpa, more than 100 times that of steel. In addition, graphene also has a large specific surface area, low density, and high thermal and electrical conductivity, so it is regarded as an ideal filler for preparing high-performance, multifunctional polymer nanocomposites. Combining graphene with matrix resin can greatly improve the toughness and impact resistance of the resin, which has important application value. ...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08K9/04C08K3/04C08F220/32C08F226/12
Inventor 罗静陈宇泽姜思思朱瑞刘晓亚
Owner 沛县度创科技发展有限公司
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