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.:
Date of Patent:
Oct. 01, 2019
Filed:
Mar. 08, 2016
Korea Research Institute of Chemical Technology, Daejeon, KR;
Saira Bano, Lahore, PK;
Asif Mahmood, Daejeon, KR;
Seong-Joong Kim, Daejeon, KR;
Kew Ho Lee, Daejeon, KR;
KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, Daejeon, KR;
Abstract
Provided is a double crosslinked sodium alginate/polyvinyl alcohol composite nanofiltration membrane, including: a porous polymer support; and a sodium alginate/polyvinyl alcohol blend coating layer formed on the porous polymer support and having a first crosslinking structure formed by complexation with divalent metal ions and a second crosslinking structure formed by acetalization with aldehyde groups. The double crosslinked sodium alginate/polyvinyl alcohol composite nanofiltration membrane disclosed herein not only shows excellent chlorine resistance but also has improved water permeation flux and salt rejection ratio, and thus may be manufactured in the form of a spirally wound type membrane module and applied to a water treatment system in which it may be utilized for an actual nanofiltration separation process.