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:
May. 13, 2014
Filed:
Jul. 02, 2012
Jianli Liu, Tianjin, CN;
Changfa Xiao, Tianjin, CN;
Xiaoyu HU, Tianjin, CN;
Wujiang Zhang, Tianjin, CN;
Ruobing Hou, Tianjin, CN;
Jianli Liu, Tianjin, CN;
Changfa Xiao, Tianjin, CN;
Xiaoyu Hu, Tianjin, CN;
Wujiang Zhang, Tianjin, CN;
Ruobing Hou, Tianjin, CN;
Tianjin Motimo Membrane Technology Co., Ltd., Tianjin, CN;
Abstract
A method for making a liquid separation membrane, including: (1) providing a polyvinylidene fluoride liquid separation membrane or polypropylene liquid separation membrane prepared by a thermally induced phase separation method as a substrate membrane, soaking the substrate membrane with water or a weak polar organic liquid to make membrane pores of the substrate membrane filled with the liquid, the soaking time being between 0.5 s and 1 min, and the weak polar organic liquid being indissolvable and compatible with the polyvinylidene fluoride liquid separation membrane or polypropylene liquid separation membrane; (2) coating a casting solution of polyvinylidene fluoride on the surface of the soaked substrate membrane obtained in step (1), and quickly soaking the substrate membrane in a coagulating bath heated to a temperature of 60-100° C. for curing to yield the liquid separation membrane.