Method and apparatus for fabricating capsule

Patent metadata

Field	Value
Publication number	US-11511253-B2
Application number	US-202016810229-A
Country	US
Kind code	B2
Filing date	Mar 5, 2020
Priority date	Nov 7, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

Provided is a method of fabricating capsules. The method includes: forming droplets of a dispersed phase solution including a phase transition material, a carbon nanomaterial, and a first monomer by allowing the dispersed phase solution to pass through nozzle units provided at a porous membrane in a reaction tank including the porous membrane; migrating the droplets into a mobile phase material including a second monomer; and forming polymer shells at interfaces between the droplets and the mobile phase material by polymerization between the first monomer and the second monomer.

First claim

What is claimed is:

1. A method of fabricating capsules, the method comprising:
forming droplets of a dispersed phase solution comprising a phase transition material, a carbon nanomaterial, and a first monomer by allowing the dispersed phase solution to pass through nozzle units provided at a porous membrane in a reaction tank comprising the porous membrane;
migrating the droplets into a mobile phase material comprising a second monomer; and
forming polymer shells respectively at interfaces between the droplets and the mobile phase material by polymerization between the first monomer and the second monomer.

2. The method of claim 1 , wherein the first monomer comprises an organic compound or phosgene having at least one functional group selected from the group consisting of an isocyanate group, a carboxyl group, and a cyano group.

3. The method of claim 1 , wherein the second monomer is a compound having an amine group or a hydroxyl group.

4. The method of claim 1 , wherein the carbon nanomaterial is selected from the group consisting of graphite, graphene, carbon fiber, and carbon nanotube (CNT).

5. The method of claim 1 , wherein the forming of droplets is performed by allowing the dispersed phase solution to pass through the nozzle units at a flow rate of 0.1 ml to 20 ml.

6. The method of claim 1 , wherein the polymerization is performed as a continuous process in a temperature range of 25° C. to 120° C.

7. The method of claim 1 , wherein the phase transition material comprises at least one selected from the group consisting of paraffin, naphthalene, biphenyl, erythritol, C 10-30 fatty acid, C 10-30 fatty alcohol, polycaprolactone (PCL), and polyethyleneglycol.

8. The method of claim 1 , wherein:
the forming the droplets comprises
providing the dispersed phase solution up to predetermined height in the reaction tank, and
disposing the porous membrane on the dispersed phase solution at a position spaced apart from a bottom of the reaction tank; and

the migrating the droplets comprises applying a pressure to the dispersed phase solution in the reaction tank to force the dispersed phase solution to pass through the nozzle units.

Assignees

• Korea Inst Sci & Tech

Inventors

• Choi Sun
• Jung Youngkyun
• Choi Ung Su

Classifications

• B01J19/0046

  Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays (synthesis methods per se C40B50/00) · CPC title

• B01J13/22

  Coating · CPC title

• B01J13/14 Primary

  Polymerisation; cross-linking · CPC title

• B01J13/16 Primary

  Interfacial polymerisation · CPC title

• B05B1/14

  with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening · CPC title