Method of forming nanoparticles having superhydrophobicity

Patent metadata

Field	Value
Publication number	US-2020346936-A1
Application number	US-201916691766-A
Country	US
Kind code	A1
Filing date	Nov 22, 2019
Priority date	May 2, 2019
Publication date	Nov 5, 2020
Grant date	—

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; 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.

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 the nanoparticles includes combusting the PDMS film while the PDMS film is tilted at a predetermined slope in order to generate the uniform nanoparticles on a sidewall of the structure.

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

7 . The method of claim 1 , further comprising:
applying fluorine-group silane on the surface of the PDMS film, on which the nanoparticles are generated, in order to ensure oleophobicity.

8 . The method of claim 7 , wherein in the applying the fluorine-group silane, n-hexane and heptadecafluoro-1,1,2,2-tetrahydrodecyltrichlorosilane are mixed at a ratio of 1000:1, PDMS on which nano-silica is generated is immersed in a solution for 24 hours, and the PDMS film is cleaned in hexane after 24 hours and then dried in an oven at 60° C. for 3 hours.

Assignees

• Univ Nat Chonnam Ind Found

Inventors

• Lee Dong Weon
• Yu Chae Rin

Classifications

• C09C3/12

  Treatment with organosilicon compounds {(C09C3/006 takes precedence)} · CPC title

• C09C1/3081

  Treatment with organo-silicon compounds · CPC title

• C08J2383/04

  Polysiloxanes · CPC title

• C08J7/08 Primary

  Heat treatment · CPC title

• C08J7/06

  with compositions not containing macromolecular substances · CPC title