Method of forming nanoparticles having superhydrophobicity

Patent metadata

Field	Value
Publication number	US-11498842-B2
Application number	US-201916691766-A
Country	US
Kind code	B2
Filing date	Nov 22, 2019
Priority date	May 2, 2019
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A method of forming nanoparticles having superhydrophobicity includes preparing a PDMS film including a structure having a predetermined shape on a surface thereof, and generating the nanoparticles having superhydrophobicity on the surface of the PDMS film by combusting the surface of the PDMS film using a diffusion flame. Transparent nanoparticles having superhydrophobicity and oleophobicity may be generated simply and easily on the surface of the PDMS film.

First claim

What is claimed is:

1. A method of forming nanoparticles having superhydrophobicity, the method comprising:
preparing a polydimethylsiloxane (PDMS) film including a structure having a predetermined shape on a surface thereof;
generating the nanoparticles having superhydrophobicity on the surface of the PDMS film by combusting the surface of the PDMS film using a diffusion flame; and
applying fluorine-group silane on the surface of the PDMS film, on which the nanoparticles are generated, in order to ensure oleophobicity.

2. The method of claim 1 , wherein the diffusion flame is a flame of 500° C. or higher generated during diffusion combustion of a paraffin candle or a soy candle.

3. The method of claim 1 , wherein the generating the nanoparticles includes combusting the surface of the PDMS film using the diffusion flame for 40 to 50 seconds.

4. The method of claim 1 , wherein the nanoparticles include silica particles and carbon particles.

5. The method of claim 1 , wherein the generating of the nanoparticles includes combusting the PDMS film while the PDMS film is tilted at a predetermined slope in order to generate uniform nanoparticles on a sidewall of the structure.

6. The method of claim 1 , wherein the structure has a shape selected from the group consisting of a mushroom, a square pillar, and a cylinder, and a micro-unit size.

7. The method of claim 1 , wherein the applying of the fluorine-group silane comprises:
immersing the PDMS film in a solution in which n-hexane and heptadecafluoro-1, 1, 2, 2-tetrahydrodecyltrichlorosilane are mixed at a ratio of 1000:1 for 24 hours;
after the immersing, cleaning the PDMS film in hexane; and
drying the cleaned PDMS film in an oven at 60° C. for 3 hours.

Assignees

• Univ Nat Chonnam Ind Found

Inventors

• Lee Dong Weon
• Yu Chae Rin

Classifications

• C08L83/04

  Polysiloxanes · CPC title

• C01B32/15 Primary

  Nano-sized carbon materials · CPC title

• C09C1/3081

  Treatment with organo-silicon compounds · CPC title

• C08K3/04

  Carbon · CPC title

• B82B3/0095

  Manufacture or treatments or nanostructures not provided for in groups B82B3/0009 - B82B3/009 · CPC title