Nanofibers comprising nanoparticles

Patent metadata

Field	Value
Publication number	US-2020179848-A1
Application number	US-201816210482-A
Country	US
Kind code	A1
Filing date	Dec 5, 2018
Priority date	Dec 5, 2018
Publication date	Jun 11, 2020
Grant date	—

Abstract

Articles and methods relating to filter media are generally provided. In some embodiments, a filter media comprises a non-woven fiber web and a backer layer. The non-woven fiber web may comprise a plurality of continuous nanofibers, e.g., continuous nanofibers having an average diameter of less than or equal to 250 nm. The plurality of the nanofibers may comprise a plurality of nanoparticles at least partially embedded therein. In some embodiments, the plurality of nanoparticles makes up less than or equal to 15 wt % of the plurality of nanofibers. In some embodiments, a solidity of the non-woven fiber web is less than or equal to a solidity of the backer layer.

First claim

What is claimed is:

1 . A filter media, comprising:
a non-woven fiber web comprising a plurality of continuous nanofibers having an average diameter of less than or equal to 250 nm; and a backer layer, wherein:
the plurality of nanofibers comprises a plurality of nanoparticles at least partially embedded therein;
the plurality of nanoparticles makes up less than or equal to 15 wt % of the plurality of nanofibers; and
a solidity of the non-woven fiber web is less than or equal to a solidity of the backer layer.

2 . The filter media of claim 1 , wherein the nanoparticles have an average diameter of greater than or equal to 5 nm and less than or equal to 50 nm.

3 . The filter media of claim 1 , wherein a ratio of an average diameter of the nanofibers to an average diameter of the nanoparticles is greater than or equal to 1.5 and less than or equal to 15.

4 . The filter media of claim 1 , wherein the plurality of nanoparticles makes up greater than or equal to 1 wt % and less than or equal to 10 wt % of the plurality of nanofibers.

5 . The filter media of claim 1 , wherein at least a portion of the nanoparticles are located in an interior of a nanofiber.

6 . The filter media of claim 1 , wherein at least a portion of the plurality of nanoparticles are located at a surface of a nanofiber.

7 . The filter media of claim 1 , wherein the nanoparticles are uncharged.

8 . The filter media of claim 1 , wherein the nanoparticles comprise an inorganic material.

9 . The filter media of claim 1 , wherein the plurality of nanoparticles comprises silica nanoparticles.

10 . The filter media of claim 1 , wherein the nanofibers have an average diameter of greater than or equal to 50 nm.

11 . The filter media of claim 1 , wherein the nanofibers are electrospun nanofibers.

12 . The filter media of claim 1 , wherein the nanofibers comprise a Nylon.

13 . The filter media of claim 1 , wherein the basis weight of the non-woven fiber web is greater than or equal to 0.05 g/m 2 and less than or equal to 10 g/m 2 .

14 . A filter element comprising the filter media of claim 1 .

15 . The filter element of claim 14 , wherein the filter element is a filter element of a type selected from the group consisting of: a flat panel filter, a V-bank filter, a cartridge filter, a cylindrical filter, a conical filter, and a curvilinear filter.

16 . A method comprising passing a fluid through the filter media of claim 1 .

17 . A method comprising passing a fluid through the filter element of claim 14 .

18 . A method as in claim 14 , wherein the fluid is a fuel.

Assignees

• Hollingsworth & Vose Co

Inventors

• Higginson Keith
• Willis Andrew

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• D04H3/016

  characterised by the fineness · CPC title

• D04H1/728

  by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)} · CPC title

• D04H1/43838

  Ultrafine fibres, e.g. microfibres · CPC title

• D04H1/413 Primary

  containing granules other than absorbent substances · CPC title