Pickering emulsion composition using polyimide particles and preparation method thereof

Patent metadata

Field	Value
Publication number	US-11097240-B2
Application number	US-201716305713-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	Jun 19, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The present invention relates to a pickering emulsion composition using polyimide particles and a method for preparing the same. The pickering emulsion stabilized by the polyimide particles according to the present invention has a very stable dispersed phase and does not cause flocculation, creaming, coalescence and phase separation even after a long time, and has an advantage of being capable of forming both an oil-in-water type emulsion and a water-in-oil type emulsion. Further, the polyimide particles used in the present invention can be synthesized in a simple manner and have partial wettability without the surface treatment and pH control so that they can be easily used for the emulsion stabilization.

First claim

The invention claimed is:

1. A method of preparing a pickering emulsion composition, the method comprising:
(a) dispersing and reacting a dianhydride compound and a diamine compound in water as a dispersion medium to obtain a polyimide;
(b) putting the polyimide obtained in step (a) into a water phase which is a continuous phase and applying ultrasonic waves thereto so as to adjust an average particle diameter of the polyimide; and
(c) adding and stirring an oil phase to the dispersion obtained in step (b).

2. A method of preparing a pickering emulsion composition, the method comprising:
(a) dispersing and reacting a dianhydride compound and a diamine compound in water as a dispersion medium to obtain a polyimide;
(b) putting the polyimide obtained in step (a) into an oil phase which is a continuous phase and applying ultrasonic waves thereto so as to adjust an average particle diameter of the polyimide; and
(c) adding and stirring a water phase to the dispersion obtained in step (b).

3. The method according to claim 1 , wherein in step (b), the ultrasonic waves are applied in 20 kHz to 100 kHz.

4. The method according to claim 1 , wherein in step (b), the ultrasonic waves are applied for 10 minutes to 120 minutes.

5. The method according to claim 1 , wherein in step (c), the average particle diameter of the polyimide in the dispersion obtained in step (b) is 10 nm to 20 μm.

6. The method according to claim 2 , wherein in step (b), the ultrasonic waves are applied in 20 kHz to 100 kHz.

7. The method according to claim 2 , wherein in step (b), the ultrasonic waves are applied for 10 minutes to 120 minutes.

8. The method according to claim 2 , wherein in step (c), the average particle diameter of the polyimide in the dispersion obtained in step (b) is 10 nm to 20 μm.

Assignees

• Univ Industry Foundation Yonsei Univ Wonju Campus
• Research & Business Found Sungkyunkwan Univ

Inventors

• Chung Chan Moon
• Lee Kwang Myong
• Cho Yu Jin
• Choi Ju Young
• Kim Beom Jun
• Jeong Jin Won
• Kim Dong Min

Classifications

• C09K23/16 Primary

  Amines or polyamines · CPC title

• B01F23/41

  Emulsifying · CPC title

• B01F23/4146

  Emulsions including solid particles, e.g. as solution or dispersion, i.e. molten material or material dissolved in a solvent or dispersed in a liquid · CPC title

• B01F23/4111

  using vibrations · CPC title

• B01F31/86

  with vibration of the receptacle or part of it · CPC title