Multifunctional filter medium, and method and apparatus for manufacturing same

Patent metadata

Field	Value
Publication number	US-10688425-B2
Application number	US-201616066825-A
Country	US
Kind code	B2
Filing date	Dec 28, 2016
Priority date	Dec 28, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

The present application relates to a multifunctional filter medium and a method of manufacturing the same. The multifunctional filter medium of the present application is capable of significantly reducing fine dust, harmful microorganisms, and toxic gases and reducing a pressure decrease during filtration due to exclusion of high-density nanofiber, thereby minimizing energy required for filtration and exhibiting sufficient filtration performance as a single filter medium.

First claim

The invention claimed is:

1. A method of manufacturing a multifunctional filter medium, the method comprising:
a step of producing photocatalyst particles using a plasma particle generator that generates high-temperature heat of about 5000° C.;
a step of attaching the photocatalyst particles to a fiber; and
a step of allowing carbon nanotubes to grow on surfaces of the photocatalyst particles attached to the fiber,
wherein the step of producing and the step of attaching are performed in a flow of an inert gas, and
wherein the inert gas flow includes oxygen or hydrogen sulfide (H 2 S).

2. The method according to claim 1 , wherein, in the step of attaching, the photocatalyst particles reach the fiber by the inert gas flow and are attached thereto.

3. The method according to claim 1 , wherein the step of attaching is performed by at least one of a thermophoretic method and an electrostatic attraction method.

4. The method according to claim 1 , wherein the step of allowing is performed at 500 to 2000° C.

5. The method according to claim 1 , wherein the step of allowing is performed under a pressure of 0.05 to 500 torr.

6. The method according to claim 1 , further comprising, after production of the photocatalyst particles, a step of classifying the photocatalyst particles by particle diameters thereof.

7. A method of manufacturing a multifunctional filter medium, the method comprising:
a step of producing photocatalyst particles using a plasma particle generator that generates high-temperature heat of about 5000° C.;
a step of allowing carbon nanotubes to grow on surfaces of photocatalyst particles; and
a step of attaching the photocatalyst particles including the carbon nanotubes grown thereon to the fiber,
wherein the step of producing and the step of attaching are performed in a flow of an inert gas, and
wherein the inert gas flow includes oxygen or hydrogen sulfide (H 2 S).

8. The method according to claim 7 , wherein the step of allowing is performed at 500 to 2000° C.

9. The method according to claim 7 , wherein the step of allowing is performed under a pressure of 0.05 to 500 torr.

10. The method according to claim 7 , further comprising, after production of the photocatalyst particles, a step of classifying the photocatalyst particles by particle diameters thereof.

Assignees

• Univ Yeungnam Res Cooperation Foundation

Inventors

• Byeon Jeong Hoon

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01D2255/2094

  Tin · CPC title

• B01D53/8668

  Removing organic compounds not provided for in B01D53/8603 - B01D53/8665 · CPC title

• B01D2255/1026

  Ruthenium · CPC title

• B01D53/8687

  Organic components · CPC title