A kind of preparation method of interlayer toughened composite material

Abstract

The invention discloses a preparation method of an interlayer toughened composite material. The steps are as follows: step 1: selecting microcapsules with multi-capsule cores as the interlayer toughened material of the composite material, and step 2: impregnating continuous fibers in a resin matrix , to make a prepreg of resin matrix and fiber; Step 3: Lay the prepreg described in Step 2 along a single direction, and transfer it to a hot press to heat and press for curing treatment; Step 4: Put the microcapsules, ring Oxygen resin and curing agent are mixed, and the resin glue with microcapsules is made after manual stirring; Step 5: Use a brush to apply the resin glue with microcapsules on the surface of the cured prepreg stack; Step 6: Put the two The prepreg stacks that have been coated and cured in Step 5 are laminated, and then transferred to a hot press for heating and pressing for interlayer matrix curing. The microcapsules used in the preparation method of the present invention have cheap raw materials, mature preparation technology, low cost and high operability, and can be popularized in large-scale industrialization.

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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