High-flux polyamide composite membrane
US10258935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2017 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Aug 22, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1251
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a high-flux polyamide composite membrane, which includes a composite membrane body, wherein the composite membrane body includes a non-woven fabric, a porous supporting layer and a polyamide layer which are successively arranged; and the polyamide layer is prepared by a polyamine solution and a poly-acyl chloride solution through an interface polymerization reaction, wherein the polyamine solution contains amino acid. The amino acid adopted in the technical solution of the present invention can be used as an end-capping reagent to react with acyl chloride groups, thereby regulating a polyamide layer structure, decreasing a cross-linking degree of the polyamide layer, and opening a channel for the passing of water molecules; and moreover, the hydrophilic performance of a membrane surface can also be improved, and a water flux is increased while a high interception rate is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.