Pickering emulsion and method of preparing the same

Patent metadata

Field	Value
Publication number	US-2018141015-A1
Application number	US-201615576232-A
Country	US
Kind code	A1
Filing date	Apr 25, 2016
Priority date	Jul 28, 2015
Publication date	May 24, 2018
Grant date	—

Abstract

Provided are a pickering emulsion including: 0.01-20 wt % of particles having an average particle diameter of 10 nm-100 μm, and 0.01-20 wt % of a non-ionic water-soluble polymer, wherein the particles are positioned on an oil droplet surface, and a method of preparing the same.

First claim

1 . A pickering emulsion comprising: 0.01-20 wt % of particles having an average particle diameter of 10 nm-100 μm, and 0.01-20 wt % of a non-ionic water-soluble polymer, based on a total weight of the emulsion, wherein the particles are positioned on an oil droplet surface.

2 . The pickering emulsion of claim 1 , wherein an oil phase is a dispersed phase, and a water phase is a continuous phase.

3 . The pickering emulsion of claim 2 , wherein the oil phase has a larger volume than the water phase.

4 . The pickering emulsion of claim 3 , wherein the oil phase accounts for 74 vol % or more, based on a total volume of the emulsion.

5 . The pickering emulsion of claim 1 , wherein the particles are metal particles, non-metal particles, or a mixture thereof.

6 . The pickering emulsion of claim 1 , wherein the non-ionic water-soluble polymer is any one or two or more selected from the group consisting of polyethylene glycol, polyethylene propylene glycol, polyoxypropylene glycol, polyethylene glycol diacrylate, polyethylene glycol dimethyl ether, polyvinyl alcohol, polyvinyl pyrrolidone and polyacrylamide.

7 . The pickering emulsion of claim 6 , wherein the non-ionic water-soluble polymer has a weight average molecular weight of 100-1,000,000 g/mol.

8 . A method of preparing a pickering emulsion comprising:
a) dispersing particles having an average particle diameter of 10 nm-100 μm in a water phase to prepare a dispersion; b) adding an oil phase and a non-ionic water-soluble polymer to the dispersion to prepare a secondary dispersion; and c) mixing the secondary dispersion to prepare the emulsion.

9 . The method of claim 8 , further comprising:
d) additionally adding an oil phase to the emulsion and carrying out mixing, once or twice or more.

10 . The method of claim 8 , wherein the pickering emulsion includes 0.01-20 wt % of the particles, and 0.01-20 wt % of the non-ionic water-soluble polymer.

11 . A method of preparing a foam structure comprising:
preparing a high internal phase pickering emulsion including 0.01-20 wt % of particles having an average particle diameter of 10 nm-100 μm, and 0.01-20 wt % of a non-ionic water-soluble polymer based on a total weight of the emulsion, the emulsion having an oil phase being a dispersed phase, and a water phase being a continuous phase, the oil phase being included as a dispersed phase at 74 vol % or more, based on a total volume of the emulsion;
a. curing the non-ionic water-soluble polymer in the high internal phase pickering emulsion to be polymerized; and
removing liquid components forming the continuous phase with the dispersed phase in the high internal phase pickering emulsion.

12 . The method of claim 11 , wherein the non-ionic water-soluble polymer contains a polymerizable functional group.

13 . A foam structure prepared by the method of claim 11 .

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Choi Siyoung
• Kim Kyu Han

Classifications

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08J3/03

  in aqueous media · CPC title

• C08J3/02

  Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques · CPC title

• C08J2323/08

  Copolymers of ethene (C08J2323/16 takes precedence) · CPC title

• C08J2333/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title