Lignin microcapsule and method of producing the same

Patent metadata

Field	Value
Publication number	US-9549952-B2
Application number	US-201514887000-A
Country	US
Kind code	B2
Filing date	Oct 19, 2015
Priority date	Oct 31, 2014
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

Disclosed are lignin microcapsules including lignin as a shell material and at least one of oil and a carbonaceous material as a core material. The lignin microcapsules may be formed by carried out polymerization in an oil-in-water emulsion including lignin, oil and water and further including a carbonaceous material. Since lignin has a phenol structure, the microcapsules including lignin may be formed to have antibacterial property. Thus, the lignin microcapsules may be used widely in various fields, such as additives for composite materials.

First claim

What is claimed is:

1. Lignin microcapsules comprising lignin as a shell material and comprising an oil and a carbonaceous material as a core material.

2. The lignin microcapsules according to claim 1 , which have a size of 10 nm-1 μm.

3. The lignin microcapsules according to claim 1 , which release oil under hydrophobic atmosphere.

4. The lignin microcapsules according to claim 1 , wherein the carbonaceous material is carbon nanotubes.

5. The lignin microcapsules according to claim 4 , wherein the carbon nanotubes are dispersed carbon nanotubes.

6. The lignin microcapsules according to claim 4 , which release carbon nanotubes under hydrophobic atmosphere.

7. The lignin microcapsules according to claim 1 , wherein the w/w ratio of lignin/oil is in a range of 5:1 to 20:1.

8. The lignin microcapsules according to claim 1 , wherein the lignin is an amount of 5-20 wt %.

9. A lignin microcapsule comprising lignin as a shell and carbon nanotubes in oil as a core.

10. The lignin microcapsule according to claim 9 , wherein the shell is configured to release the oil in response to hydrophobic atmosphere or external force.

11. A material comprising a nanofiber or a nanoweb, the material comprising the lignin microcapsule according to claim 9 .

Assignees

• Korea Inst Sci & Tech

Inventors

• Jung Yong Chae
• Lee Eun Sil
• Yoo Hye Jin
• Lee Sang Hyun
• Hwang Junyeon
• Yang Cheol-Min
• Park Min

Classifications

• H01L51/0048

  Electricity · mapped topic

• A61K9/1652

  Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin (homeopathic globules A61K9/1623) · CPC title

• A61K9/5031

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide) · CPC title

• A61K33/44 Primary

  Elemental carbon, e.g. charcoal, carbon black · CPC title

• B01J13/14

  Polymerisation; cross-linking · CPC title