Composites with controllable superhydrophilic and superhydrophobic interface performances, a 3d printing method and 3d printed parts

Patent metadata

Field	Value
Publication number	US-2023415407-A1
Application number	US-202217882518-A
Country	US
Kind code	A1
Filing date	Aug 5, 2022
Priority date	Jun 23, 2022
Publication date	Dec 28, 2023
Grant date	—

Abstract

The present invention provides composites with controllable superhydrophilic and superhydrophobic performances, a 3D printing method and 3D printed parts. The composites with controllable superhydrophilic and superhydrophobic interface performances comprise hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers. The present invention can print the parts with a continuous wettability change from superhydrophilic to superhydrophobic performances by regulating the mass percentage of the hydrophobic powder, the hydrophilic powder and the jointing phase powder. Furthermore, the present invention can prepare the models with various shapes according to different application scenes, and regulate the interface wettability performances of the models.

First claim

What is claimed is:

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8 . A 3D printing method, comprising the following steps: providing the composites with controllable superhydrophilic and superhydrophobic interface performances; and according to a 3D model for the to-be-manufactured printed part, using selective laser sintering process to enable the composites to be formed to obtain the printed parts;
comprising hydrophobic powder and/or hydrophilic powder and jointing phase powder, wherein the jointing phase powder is thermoplastic polymers.

9 . The 3D printing method according to claim 1 , wherein if the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the hydrophobic powder, the hydrophilic powder and the jointing phase powder, the 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.

10 . The 3D printing method according to claim 1 , wherein the hydrophobic powder comprises at least one of polytetrafluoroethylene, polyvinylidene fluoride and hydrophobic fumed silica.

11 . The 3D printing method according to claim 1 , wherein the hydrophilic powder comprises at least one of hydrophilic fumed silica, hydrophilic mica powder, glass bead, copper oxide, aluminium oxide, calcium carbonate, titanium dioxide and magnesium oxide.

12 . The 3D printing method according to claim 1 , wherein the thermoplastic polymer comprises at least one of polypropylene, polyethylene, polyinyl chloride, polystyrene, nylon, polycarbonate, polymethylmethacrylate, epoxy resin, phenolic resin, polyamide and polysulfone.

13 . The 3D printing method according to claim 1 , wherein if the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the hydrophobic powder, the hydrophilic powder and the jointing phase powder, the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the following components in parts by weight: 0.001-5 parts of hydrophobic powder, 0.001-90 parts of hydrophilic powder and 10-100 parts of jointing phase powder, if the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the hydrophilic powder and the jointing phase powder, the hydrophilic powder comprises at least one of hydrophilic fumed silica, hydrophilic glass bead and hydrophilic mica powder, wherein the particle size of hydrophilic fumed silica is 5-100 nm, the particle size of hydrophilic glass bead is 1-75 μm, and the particle size of hydrophilic mica powder is 0.5-90 μm; the jointing phase powder comprises at least one of hydrophilic phenolic resin and hydrophilic epoxy resin; the particle size of the jointing phase powder is 1-100 μm; the mass percentage of the hydrophilic powder in the composites with controllable superhydrophilic and superhydrophobic interface performances is 3-90%, if the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the hydrophobic powder and the jointing phase power, the particle size of the jointing phase powder is 1-100 μm, and the hydrophobic powder comprises at least one of hydrophobic fumed silica and polytetrafluoroethylene powder, wherein the particle size of hydrophobic fumed silica is 5-100 nm, the particle size of polytetrafluoroethylene powder is 1-80 μm, and the mass percentage of hydrophobic micro/nano-powder in the composites with controllable superhydrophilic and superhydrophobic interface performances is 3-36%.

14 . The 3D printing method according to claim 1 , wherein if the composites with controllable superhydrophilic and superhydrophobic interface performances comprise the hydrophobic powder, the hydrophilic powder and the jointing phase powder, the particle sizes of the hydrophobic powder, the hydrophilic powder and the jointing phase powder are all 0.005-100 μm.

Assignees

• Univ Huazhong Science Tech

Inventors

• Su Bin
• Wu Zhenhua
• Shi Congcan
• Li Yike
• Yan Chunze
• Shi Yusheng

Classifications

• B29C64/153 Primary

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B33Y10/00 Primary

  Processes of additive manufacturing · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B29K2101/12

  Thermoplastic materials · CPC title

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title