Preparation method of toughened carbon fiber resin matrix composite

Abstract

The invention relates to a preparation method of a toughened carbon fiber resin matrix composite. The preparation method of the toughened carbon fiber resin matrix composite comprises the following steps: (1) adding epoxy resin in a polyethersulfone solution to obtain a mixed solution, and finally carrying out defoaming treatment for subsequent use; (2) coating uniformly distributed flat plates with the same apertures of surface holes with the mixed solution by using a film wiping bar, forming a film in deionized water coagulating bath to obtain a primary film, and washing and drying the primary film to obtain a composite film; and (3) laying the composite film and carbon fiber cloth, carrying out resin filling under negative pressure, and solidifying resin to obtain the toughened carbon fiber resin matrix composite. The preparation method of the toughened carbon fiber resin matrix composite is simple in preparation process, high in operability and suitable for industrial production. The mechanical property of the prepared composite is slightly improved, the interlaminar fracture toughness is improved remarkably, and the application prospect is good.

Description

technical field [0001] The invention belongs to the field of carbon fiber composite materials, in particular to a preparation method of a toughened carbon fiber resin matrix composite material. Background technique [0002] With the development of lightweight materials in the aviation industry, Carbon Fiber Reinforced Polymer CFRP (Carbon Fiber Reinforced Polymer CFRP) is increasingly used in aircraft primary / secondary structural materials, so the development of high-toughness carbon fiber / epoxy resin composites Material is an important research direction in the field of composite materials at present. [0003] There are two main ways to toughen carbon fiber / epoxy resin composites: one is to toughen the epoxy resin matrix, and the other is to toughen the composite material between layers. Interlaminar toughening is the addition of thin layers of toughening material between composite plies to improve the fracture toughness and damage tolerance of the composite; it can be des...

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Problems solved by technology

[0004] However, the current method of interlayer toughening often leads to the phenomenon that the resin cannot be completely penetrated, resulting in the strength of the carbon fiber resin matrix composite material is still not high enough, which limits its application development.

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