Preparation method of 3D printing multi-scale layered rigid-flexible impact-resistant composite material

Abstract

The application discloses a kind of preparation methods of 3D printing multi-scale layered rigid-flexible impact-resistant composite materials.The method comprises the following steps: designing PLA skeleton with multi-scale layered structure, obtaining STL format file after slicing processing;Preparation of PLA skeleton by 3D printing, silicon elastomer is used as soft material and adhesive, and the composite material is obtained after curing in the multi-level layered structure of skeleton;The layered structure of the composite material has three scales, which is realized by designing patterned microstructure on each layer to induce 3D printing path to stack layer by layer, without complex programming;The silica gel in the gap of each level of layered structure is integrally formed, and the composite material has rigid-flexible coupling properties, wherein the hard PLA skeleton makes the composite material have good mechanical properties, and the soft silica gel provides greater deformation to realize energy dissipation during impact resistance;The contact surface between macroscopic layers is designed with interlaced tooth-shaped protruding interface structure, which induces the deflection direction of crack.

Images