Novel thermosetting epoxy resin used for carbon fiber composite material

Abstract

The invention provides novel thermosetting epoxy resin used for a carbon fiber composite material. The novel thermosetting epoxy resin used for the carbon fiber composite material comprises the following components in parts: 40-60 parts of epoxy resin/polybutadiene rubber polymer, 40-60 parts of mixed type epoxy resin, 0.1-0.5 part of graphene, 5-10 parts of SBM/MAM copolymer, 4-8 parts of a toughening agent, 0.1-0.5 part of a dispersing agent, 1-5 parts of attapulgite, 1-5 parts of a thixotropic agent, 0.1-0.5 part of a wetting agent, 5-12 parts of dicyandiamide, 1-5 parts of a latent accelerator and 0.5-1.0 part of a coupling agent. By adopting the thermosetting epoxy resin, pre-treatment can be carried out on a carbon fiber body, so that good compatibility and permeability between resin and carbon fibers can be guaranteed, the prepared carbon fiber composite plate has high shear strength and tensile strength, and stringent requirements of aerospace, war industry, rail transit, water traffic, automobiles and sports equipment can be met.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a novel thermosetting epoxy resin used for carbon fiber composite materials. Background technique [0002] Because of its light weight, high strength and easy cutting, carbon fiber composite materials have been widely used as structural materials in aerospace, military industry, rail transportation, water transportation, automobiles, sports equipment, electronic and electrical products and other fields. Carbon fiber composite materials are generally formed by pultrusion, and the carbon fiber materials are bonded together with an adhesive, which puts forward high requirements for the adhesive. In the prior art, the adhesives used in carbon fiber composite materials mainly have the following problems: [0003] (1) The thermosetting epoxy resin currently on the market cannot achieve the pretreatment effect on the carbon fiber body, resulting in poor compatibil...

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Problems solved by technology

[0003] (1) The thermosetting epoxy resin currently on the market cannot achieve the pretreatment effect on the carbon fiber body, resulting in poor compatibility / permeability between the resin and carbon fiber, so the shear strength and tensile strength of the produced carbon fiber composite material plate poor strength

[0004] (2) The performance of the carbon fiber composite board is poor during the cycle test at a low temperature of -40°C to a high temperature of 130°C, and the outdoor environment aging test, and the thermal conductivity is poor, which cannot meet the requirements of aerospace, military, rail transportation, water transportation, Stringent requirements for automobiles, sports equipment, etc.

[0005] (3) The new thermosetting epoxy resin used in the current prior art for carbon fiber composite materials is slow to thaw after it is taken out from the refrigerated environment, and it takes 4-6 hours; and because the viscosity of the thermosetting epoxy resin is greater than 30000cps, the viscosity is higher , in the production process, the fluidity is not good, the molding efficiency is low, and the energy consumption is wasted

[0006] (4) The new thermosetting epoxy resin used in the prior art for carbon fiber composite materials needs to be stored at -15°C to 5°C, and the shelf life is 3 to 6 months. The shelf life is short at 25°C, generally 1 to 2 In summer, the temperature in the transport car is as high as 68-80°C, so it is not suitable for long-distance transportation in summer when the outdoor temperature is 25-42°C

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