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A kind of special prepolymerized graphene master batch for thermosetting epoxy resin and preparation method

A technology of epoxy resin and graphene, applied in the field of pre-polymerized graphene masterbatch for thermosetting epoxy resin and preparation, can solve the problem that graphene is difficult to disperse, solvent is difficult to remove, and the performance of graphene epoxy resin composite material is not ideal, etc. problem, to achieve the effect of improving strength and toughness

Active Publication Date: 2019-03-22
山东中洋新创复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the composite process in the existing actual production process. In the prior art, graphene and epoxy resin are usually composited by a blending method, and graphene has poor dispersion in the epoxy resin matrix by direct blending. Good, and graphene is prone to agglomeration
The solution blending method of graphene is also difficult to fully and uniformly disperse, and the solvent is difficult to remove due to the strong adsorption of graphene.
Both methods will introduce defects after the epoxy resin is cured, which will affect the strengthening effect of graphene, and then lead to the performance of the graphene epoxy resin composite material is not ideal enough to meet the application requirements in various fields, which limits the promotion and application of composite materials. develop

Method used

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  • A kind of special prepolymerized graphene master batch for thermosetting epoxy resin and preparation method

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Embodiment 1

[0030] A special pre-polygraphene masterbatch for thermosetting epoxy resin, made of the following raw materials in parts by weight: 50 parts of graphene, 1 part of surfactant sodium lauryl alcohol polyoxyethylene ether sulfate, bisphenol A type 20 parts of epoxy resin monomer, 1 part of catalyst triphenyl phosphate, 50 parts of organic solvent methyl ethyl ketone, 1 part of latent curing agent boron trinitride ethylamine.

[0031] A kind of preparation method of special pre-polygraphene masterbatch of thermosetting epoxy resin, comprises the following steps:

[0032] (1) Mix graphene and organic solvent evenly, then add surfactant, and ultrasonically disperse for 30-120 minutes to obtain a mixed system;

[0033] (2) Add epoxy resin monomer to the mixing system in step (1), stir and heat up to 70~90°C, add catalyst in 2 times, stir at a uniform speed and dropwise add lye with a concentration of 10%-30%, so that Epoxy resin monomers are pre-polymerized and coated with graphene...

Embodiment 2

[0036] A special pre-polymerized graphene masterbatch for thermosetting epoxy resin, which is made of the following raw materials in parts by weight: 20 parts of redox graphene, 3 parts of surfactant sodium lauryl sulfate, bisphenol F type epoxy resin 40 parts of monomer, 1 part of catalyst tetramethylammonium bromide, 40 parts of organic solvent toluene, 0.5 part of latent curing agent dicyandiamide.

[0037] A kind of preparation method of special pre-polygraphene masterbatch of thermosetting epoxy resin, comprises the following steps:

[0038] (1) Mix graphene and organic solvent evenly, then add surfactant, and ultrasonically disperse for 30-120 minutes to obtain a mixed system;

[0039] (2) Add epoxy resin monomer to the mixing system in step (1), stir and heat up to 70~90°C, add catalyst in 3 times, stir at a constant speed and dropwise add lye with a concentration of 10%-30%, so that Epoxy resin monomers are pre-polymerized and coated with graphene to form a capsule stru...

Embodiment 3

[0042] A special pre-polymerized graphene masterbatch for thermosetting epoxy resin, made by weight of the following raw materials: 50 parts of graphene, 3 parts of surfactant triethanolamine lauryl sulfate, 100 parts of monomer of novolac epoxy resin, The catalyst comprises 2 parts of cetyltrimethylammonium bromide, 100 parts of organic solvent polyethylene glycol, and 1 part of latent curing agent boron trimethylnitride ethylamine.

[0043] A kind of preparation method of special pre-polygraphene masterbatch of thermosetting epoxy resin, comprises the following steps:

[0044] (1) Mix graphene and organic solvent evenly, then add surfactant, and ultrasonically disperse for 30-120 minutes to obtain a mixed system;

[0045] (2) Add epoxy resin monomer to the mixing system in step (1), stir and heat up to 70~90°C, add catalyst in 4 times, stir at a constant speed and dropwise add lye with a concentration of 10%-30%, so that Epoxy resin monomers are pre-polymerized and coated w...

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Abstract

The invention belongs to the technical field of high-molecular polymer, and particularly relates to a special pre-polymerization graphene master batch for thermoset epoxy resin, and a preparation method. The preparation method comprises the following steps: dispersing graphene into an epoxy resin monomer for pre-polymerization, an cladding the graphene to form a capsule to obtain the pre-polymerization graphene master batch. The pre-polymerization graphene master batch is easily dispersed into epoxy resin, and graphene is pre-dispersed into epoxy resin through carrying the capsule. The assisted latent curing agent chemically reacts with the pre-polymerization capsule wall of epoxy resin and graphene master batch due to outside temperature to form a reticular space polymer, on one hand, graphene is dispersed into epoxy resin due to breakage of the capsule wall, on the other hand, graphene is complexed and wounded together with epoxy resin, so that the intensity and toughness of the epoxy resin can be greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymers, and specifically relates to a special pre-polymerized graphene master batch for thermosetting epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin refers to an organic compound containing two or more epoxy groups in the molecule. Before curing, it is a linear thermoplastic resin. The molecular structure contains active epoxy groups that can be combined with various types of The curing agent cross-links to form an insoluble three-dimensional network structure. The cured epoxy resin has good physical and chemical properties, it has excellent bonding strength to the surface of metal and non-metal materials, good dielectric properties, small deformation shrinkage, good dimensional stability of products, high hardness, flexibility Good resistance, stable to alkali and most solvents, there are many kinds of cured epoxy resins, widely used, and have ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L63/04C08K3/04C08J3/22
CPCC08J3/226C08J2363/00C08J2463/00C08J2463/04C08K3/04C08L63/00C08L2205/02C08L2205/025C08L63/04
Inventor 陈庆王镭迪曾军堂
Owner 山东中洋新创复合材料有限公司
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