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Abstract
There are growing demands for multimaterial three-dimensional (3D) printing to manufacture 3D object where voxels with different properties and functions are precisely arranged. Digital light processing (DLP) is a high-resolution fast-speed 3D printing technology suitable for various materials. However, multimaterial 3D printing is challenging for DLP as the current multimaterial switching methods require direct contact onto the printed part to remove residual resin. Here we report a DLP-based centrifugal multimaterial (CM) 3D printing method to generate large-volume heterogeneous 3D objects where composition, property and function are programmable at voxel scale. Centrifugal force enables non-contact, high-efficiency multimaterial switching, so that the CM 3D printer can print heterogenous 3D structures in large area (up to 180 mm × 130 mm) made of materials ranging from hydrogels to functional polymers, and even ceramics. Our CM 3D printing method exhibits excellent capability of fabricating digital materials, soft robots, and ceramic devices.
Multimaterial 3D printing using digital light processing (DLP) is challenging because multimaterial switching methods require direct contact onto the printed part to remove residual resin. Here, the authors report a DLP-based centrifugal multimaterial 3D printing method to generate large-volume heterogeneous 3D objects where composition, property and function are programmable at voxel scale.
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1 Southern University of Science and Technology, Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790); Southern University of Science and Technology, Department of Mechanical and Energy Engineering, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790)
2 Southern University of Science and Technology, Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790); Southern University of Science and Technology, Department of Mechanical and Energy Engineering, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790); City University of Hong Kong, Department of Mechanical Engineering, Kowloon, China (GRID:grid.35030.35) (ISNI:0000 0004 1792 6846)
3 Guangzhou University, School of Electronics and Communication Engineering, Guangzhou, China (GRID:grid.411863.9) (ISNI:0000 0001 0067 3588)
4 Southern University of Science and Technology, Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790); Southern University of Science and Technology, Department of Mechanics and Aerospace Engineering, Shenzhen, China (GRID:grid.263817.9) (ISNI:0000 0004 1773 1790)