Preparation of Thin Film Composite (TFC) Charged Nanofiltration (NF) Membranes
The technology provides a process for the preparation of Thin Film Composite (TFC) charged nanofiltration (NF) membranes containing surface negative charge in the form of fixed sulfonic acid groups . The spiral module prepared from the membranes can be used for water purification for domestic. The membranes can also be used for fractional separation of mixed systems containing monovalent and multivalent ions by successfully separating the solutes containing multivalent anions such as sulfates, etc. by retaining them and allowing the solutes with monovalent anions and cations to pass through. Membranes of a range of performances, according to the need of any application, can be prepared by variation of chemical compositions.
