US 11,858,205 B1
Composites with controllable superhydrophilic and superhydrophobic interface performances, a 3D printing method and 3D printed parts
Bin Su, Wuhan (CN); Zhenhua Wu, Wuhan (CN); Congcan Shi, Wuhan (CN); Yike Li, Wuhan (CN); Chunze Yan, Wuhan (CN); and Yusheng Shi, Wuhan (CN)
Assigned to Huazhong University of Science and Technology, Wuhan (CN)
Filed by Huazhong University of Science and Technology, Wuhan (CN)
Filed on Aug. 5, 2022, as Appl. No. 17/882,518.
Claims priority of application No. 202210719335.3 (CN), filed on Jun. 23, 2022; application No. 202210719351.2 (CN), filed on Jun. 23, 2022; and application No. 202210727730.6 (CN), filed on Jun. 23, 2022.
Int. Cl. B29C 64/153 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B29K 105/00 (2006.01); B29K 101/12 (2006.01)
CPC B29C 64/153 (2017.08) [B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B29K 2101/12 (2013.01); B29K 2105/251 (2013.01)] 1 Claim
 
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.