PREPARATION OF WATER SOFTENING MEMBRANES USING A NOVEL METHOD OF THE FUNCTIONALIZED UF MEMBRANE SURFACE REACTION WITH HYPER-BRANCHED POLYMERS

Nano-filtration (NF) membranes usage for water softening application is growing very fast during the last decade considering the efficient removal of divalent and multivalent ions [۱] that makes a big contribution to the water hardness. In this study a thin film composite (TFC) membrane prepared by a reaction between the Polyethylenimine (PEI) and carboxylic group in the blend UF membrane. A new method used to prepare a low-pressure nano-filtration membrane based on the membrane surface reaction (functionalized UF blend membrane) with polyethyleneimine (PEI) to fabricate thin film composite (TFC) membranes for water softening applications. TFC selective layer prepared by a reaction between the carboxyl group from carboxylated polyether sulfone (CPES) /PES UF blend membrane and polyethyleneimine (PEI).