Patent ID: 11858205
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A 3D printing method, comprising following steps:
providing composites with controllable superhydrophilic and superhydrophobic interface performances; and
according to a 3D model for the to-be-manufactured printed part, using a selective laser sintering process to enable the composites to be formed to obtain printed parts;
wherein if the composites comprise hydrophobic powdery hydrophilic powder and jointing phase powder, printing parameters are as follows: a laser power is 4-20 W, a scanning speed is 500-4000 mm/s, and a temperature of the forming cylinder is 25-150° C; the jointing phase powder is thermoplastic polymers; and the composites comprise the following components in parts by weight: 0.001-5 parts of hydrophobic powder, parts of hydrophilic powder and 10-100 parts of jointing phase powder; the hydrophobic powder is hydrophobic fumed silica; the hydrophilic powder comprises at least one of hydrophilic glass bead and hydrophilic calcium carbonate; the thermoplastic polymers comprises at least one of polypropylene, epoxy resin, phenolic resin; a particle size of the hydrophobic powder, the hydrophilic powder and the jointing phase powder is 0.5˜50 μm;
wherein if the composites comprise hydrophobic powder and jointing phase power, a particle size of the jointing phase powder is 1-100 μm; the hydrophobic powder is hydrophobic fumed silica, and a particle size of hydrophobic fumed silica is 5-100 nm; the jointing phase powder is polypropylene, a mass percentage of the hydrophobic powder in the composites is 4-6%; printing parameters are as follows: a temperature of the forming cylinder is 130° C., a laser power is 23-29 W, a scanning speed is 4000 mm/s, a scanning interval is 0.1 mm, and a layer thickness is 0.1 mm;
wherein if the composites comprise hydrophilic powder and jointing phase powder, the hydrophilic powder is hydrophilic glass bead, and a particle size of hydrophilic glass bead is 1-75 μm; the jointing phase powder is hydrophilic phenolic resin, and a particle size of the jointing phase powder is 1-100 μm; a mass percentage of the hydrophilic glass bead in the composites is 60-90%; printing parameters are as follows: a temperature of the forming cylinder is 70° C., a laser power is 5-6.5 W, a scanning speed is 1000 mm/s, a scanning interval is 0.1 mm, and a layer thickness is 0.1 mm.