Preparation method of lightweight and high-strength high-energy glue-rigid foam composite material structure

Abstract

The invention discloses a preparation method of a lightweight and high-strength high-energy glue-rigid foam composite material structure. The preparation method comprises the following steps: cuttinghigh-energy glue, fiber pre-soaking cloth and rigid foam; wrapping the rigid foam with the high-energy glue and wrapping the high-energy glue with the fiber pre-soaking cloth; putting the obtained pre-formed product into a mold, closing the mold and covering tightly, and heating the mold at 100 to 200 DEG C for 10 to 60 minutes, so that the high-energy glue in the product is heated to generate anexpanding force from inside to outside and the fiber pre-soaking cloth is solidified and formed at high temperature; and performing cooling operation on the formed mold and opening the mold to take out the high-energy glue-rigid foam composite material structure, wherein the maximal expanding strength of the high-energy glue in the heating expansion process is less than or equal to the compressivestrength of the rigid foam subjected to 10 percent of compressive deformation. The high-energy glue-rigid foam composite material structure has lightweight and high-strength effects, and can be applied in the fields of aerospace, new-energy automobiles and the like which need the lightweight and high-strength composite materials.

Description

technical field

[0001] The invention relates to the field of fiber composite molding, in particular to a method for preparing a lightweight, high-strength, high-energy glue-rigid foam composite structure. Background technique

[0002] The existing preparation method of rigid foam composite material is as follows: CNC cutting of rigid foam, brushing adhesive glue or pasting film, then wrapping carbon fiber cloth, putting it into abrasive tools, forming and cooling. The prior art has the following disadvantages: 1. It needs to be cut into a fixed shape, so CNC equipment is needed, and the production cost is high; 2. The product strength is not high, and all the strength depends on molding, and the interlayer bonding force is not high; Instability, resulting in unstable appearance and uneven bonding between fiber materials; 3. Adhesive layer is required, and the adhesive layer has no expansion force, which affects the bonding force between product layers, resulting in unstable ...

Images