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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11603443 B1

PDFFull Text
Date of Patent:
Mar. 14, 2023

Filed:

Aug. 24, 2018

Composite porous membrane and preparation method therefor and use thereof

Applicant:

Beijing Normal University, Beijing, CN;

Inventors:

Jianjun Zhou, Beijing, CN;

Lin Li, Beijing, CN;

Zhiyu Hu, Beijing, CN;

Assignee:

BEIJING NORMAL UNIVERSITY, Beijing, CN;

Attorneys:

Novick, Kim & Lee, PLLC

Allen Xue

Primary Examiner:

Anthony R Shumate

Int. Cl.
CPC ...
B01D 53/22 (2006.01); C08J 7/043 (2020.01); B01D 69/12 (2006.01); B01D 71/26 (2006.01); B01D 71/34 (2006.01); B01D 71/48 (2006.01); H01M 50/491 (2021.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); B01D 67/00 (2006.01); H01M 50/474 (2021.01);
U.S. Cl.
CPC ...
C08J 7/043 (2020.01); B01D 53/228 (2013.01); B01D 69/125 (2013.01); B01D 71/26 (2013.01); B01D 71/34 (2013.01); B01D 71/48 (2013.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); B01D 67/0027 (2013.01); B01D 2323/21 (2013.01); B01D 2323/50 (2013.01); B01D 2325/021 (2013.01); B01D 2325/04 (2013.01); H01M 50/474 (2021.01);
Abstract

A composite porous membrane contains at least one porous base layer and at least one uniaxially stretched coating layer located on at least one side surface of the porous base layer. For example, the composite porous membrane comprises at least one porous base layer and at least one nanofiber-like non-polyolefin polymer porous layer oriented along the transverse stretching direction of the composite porous membrane and located on one or two side surfaces of the porous base layer, or the composite porous membrane comprises a biaxially stretched polypropylene porous base layer and a uniaxially stretched coating layer located on at least one side surface of the porous base layer. The composite porous membrane is coated with a coating solution prior to transversely stretching. The nanofiber-like non-polyolefin polymer porous layer may reduce cracking of the composite porous membrane in the machine direction.

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