Polyamide reverse osmosis membranes, used successfully for water desalination, are made from
the interfacial reaction of meta-phenylenediamine (MPD) with trimesoyl chloride. One
problem with the membrane is that its performance is deteriorated upon prolonged exposure
to chlorine often used for disinfecting feedwater. ATR-FTIR and XPS analysis show chlorine
reacts with the amide hydrogen and is attached to the polyamide membrane. A chlorine
resistant membrane has been made using a non-MPD amine and appears to be five times as
chlorine-resistant as the MPD-based membrane. ATR-FTIR and XPS analysis also show the
chlorine-resistant membrane picks up chlorine much less than the MPD-based membrane
upon exposure to chlorine. Monochloramine does not appear to adversely affect polyamide
membranes. Includes 10 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 950 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 12 |
| Published : | 11/01/2009 |
