3D PRINTING SYSTEM, 3D PRINTING METHOD, AND BIOMATERIAL FOR 3D PRINTING

摘要

A 3D printing system and a 3D printing method capable of implementing alternate feeding of multiple materials and implementing a non-uniform mixing system. The 3D printing system comprises an optical system, a feeding system, a lifting and lowering platform, and a cavity. The lifting and lowering platform and the cavity form a space for receiving a material from a feeding mechanism. The lifting and lowering platform is independent of the feeding mechanism. Each time printing is performed, the lifting and lowering platform steps with respect to the optical system. The 3D printing method comprises: 1) preparing the 3D printing system and a material liquid, and inputting a printing task; 2) lowering the lifting and lowering platform by a layer thickness in the cavity; 3) feeding the material to the cavity by a cartridge; and 4) photocuring the material liquid by the optical system. Also provided are a biomaterial used as a 3D printing raw material, comprising a photoresponsive crosslinking group modified macromolecule, an o-nitrobenzyl phototrigger modified macromolecule, and a photoinitiator.