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Graphene dispersion method, graphene dispersion system and its preparation method and application

A graphene dispersion liquid and graphene technology, applied in graphene dispersion, graphene dispersion system and its preparation and application fields, can solve problems such as agglomeration, uneven dispersion of composite materials, poor graphene dispersion, etc. Compatibility issues, good dilution and the effect

Active Publication Date: 2017-10-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor dispersion of graphene in the currently prepared graphene composite materials, most of the epoxy resin composite materials are inactive diluents or toxic and volatile solvents to prepare graphene epoxy resin composite materials. Materials, agglomeration often occurs in non-hydrophilic solutions, and graphene layers also aggregate between layers, resulting in uneven dispersion in composite materials

Method used

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  • Graphene dispersion method, graphene dispersion system and its preparation method and application
  • Graphene dispersion method, graphene dispersion system and its preparation method and application
  • Graphene dispersion method, graphene dispersion system and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: The graphene that takes 0.0075g and 1.5g epoxycyclopentane are uniformly mixed, and the epoxy diluent-graphene mixture that makes is mixed with 15g epoxy resin, mechanically stirred for 5 minutes, added 12g Low-molecular polyamide 650 curing agent, and cured at 70 ° C for 4 hours, and then cured at room temperature for 72 hours to obtain a cured graphene-epoxy resin composite material. see Figure 1-2 The morphology of the graphene-epoxy composite before and after curing is shown. see again Figure 3a-Figure 3b , it can be seen that graphene is uniformly dispersed in the composite material.

Embodiment 2

[0043] Embodiment 2: Take by weighing 0.015g graphene and 1.5g epoxycyclopentane, mix evenly, the epoxy diluent-graphene mixture that makes is mixed with 15g epoxy resin, mechanically stirs 10 minutes, adds 12g low-molecular polyamide 650, and cured at 70°C for 4 hours, and then cured at room temperature for 72 hours to obtain a cured graphene-epoxy composite material. see Figure 1-2 The morphology of the graphene-epoxy composite before and after curing is shown. Likewise, graphene is uniformly dispersed in the composite material.

Embodiment 3

[0044]Embodiment 3: Take by weighing 0.0225g graphene and 1.5g epoxycyclopentane, mix evenly, the epoxy diluent-graphene mixture that makes is mixed with 15g epoxy resin, mechanically stirs 10 minutes, adds 12g low-molecular polyamide 650, and cured at 70°C for 4 hours, and then cured at room temperature for 72 hours to obtain a cured graphene-epoxy composite material. see Figure 1-2 The morphology of the graphene-epoxy composite before and after curing is shown. Likewise, graphene is uniformly dispersed in the composite material.

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Abstract

The invention discloses a graphene dispersion method, a graphene dispersion system, a preparation method and application thereof. The present invention mainly forms a stable graphene dispersion by uniformly dispersing graphene in an epoxy diluent, further, uniformly mixing the graphene dispersion with other substrates, such as epoxy resin, to form a graphene dispersion systems, such as graphene-epoxy composites. Wherein the epoxy diluent comprises an epoxy compound directly connected with a cyclic group. The present invention can solve the problem of poor dispersibility of graphene in conventional organic solvents and epoxy resins, especially high-viscosity epoxy resins, and obtain a graphene dispersion system with a large amount of graphene dispersion and good stability, especially with excellent Graphene-epoxy resin composite material with mechanical properties, and the related process route is simple, the reaction conditions are mild, the source of raw materials is abundant, and it is safe and environmentally friendly.

Description

technical field [0001] The present invention specifically relates to a graphene dispersion method, a graphene dispersion system, and a graphene-based composite material, such as a graphene-based epoxy resin composite material and its preparation method and application. Background technique [0002] Graphene has excellent electrical conductivity, thermal conductivity and mechanical strength, and the composite material made of it and EP can give full play to the advantages of both, which is manifested in the thermal conductivity, electromagnetic property, tensile strength and modulus of the composite material significantly improved. Graphene also has the characteristics of excellent rigidity, dimensional stability and toughness. As a modifier of EP, it can significantly improve the mechanical properties of composite materials. The addition of graphene can also overcome the disadvantages of large amount of common inorganic fillers and low modification efficiency. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K3/04C08G59/20C08G59/40
Inventor 蒋曙韩金乌学东姜道义陈永悦薛清泉曹慧军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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