Preparation method of interlayer toughened composite material

Abstract

The invention discloses a preparation method of an interlayer toughened composite material. The method comprises the following steps: 1, selecting microcapsules with multiple capsule cores as the interlayer toughened material of the composite material; 2, impregnating continuous fibers in a resin matrix to prepare a resin matrix and fiber prepreg; 3, laying up the prepreg obtained in step 2 in a single direction, transferring the prepreg to a hot press, and heating and pressurizing for curing treatment; 4, mixing the microcapsules, epoxy resin and a curing agent, and performing manual stirringto prepare a resin glue solution with the microcapsules; 5, smearing the surface of the obtained cured prepreg stack with the resin glue solution with the microcapsules by using a brush; and 6, attaching the two smeared and cured prepreg stacks obtained in step 5, transferring the attached stacks to a hot press, and heating and pressurizing the attached stacks to carry out interlayer matrix curing treatment. The preparation method has the advantages of low price of raw materials for preparing the adopted microcapsules, mature preparation process, low cost and high operability, and realizationof large-scale industrial promotion.

Description

technical field [0001] The invention belongs to the process preparation technology of carbon fiber / resin-based composite materials, specifically a composite material modification method using agglomerated microcapsules as toughening materials, and belongs to the field of composite material science and technology. Background technique [0002] Composite materials have unique advantages such as high specific strength, high specific stiffness, heat resistance, corrosion resistance, and good designability. At present, they are widely used in the design and manufacturing of high-speed trains, aerospace, wind turbines, and automobiles. For example, large passenger aircraft Boeing The amount of composite materials on the 787 is as high as 50%, and the amount of composite materials on the fan blades of wind turbines exceeds 90%. [0003] As one of the commonly used components, composite panels are a typical layered structure, mainly relying on thermosetting matrix resin for bonding,...

AI Technical Summary

Problems solved by technology

Matrix toughening refers to adding rubber or thermoplastic materials to the resin to improve the fracture toughness of the composite material, but this method will increase the weight of the structure and manufacturing costs, and the addition of thermoplastic resin increases the viscosity of the matrix resin, resulting in the composite material. In-plane performance degradation

Nanostructure toughening methods mainly include inserting carbon nanotube tulle between layers or constructing a combined structure of fibers and carbon nanotubes to achieve the effect of material toughening, but these technologies are relatively complicated and are still in the basic research stage. There are many problems in the process, and it is impossible to carry out large-scale promotion and use

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