The 2nd International Conference on Buildings, Construction and Environmental Engineering- BCEE2 17-18 October 2015 Beirut, Lebanon Preparation and Characterization PVC/PS/PVA Hollow Fiber Nano-filtration Composite Membranes Materials and Methods 1Talib Albyati, 2Rana Kadhim, 1Zainab Shneen, 1Qusay Alsalhy, 3S. Simone, 3Alberto Figoli, 3Enrico Drioli 1 Chemical Engineering Department, University of Technology, Baghdad, Iraq 2 Civil Engineering Department, University of Technology, Baghdad, Iraq 3 Institute on Membrane Technology (ITM-CNR), Calabria University, Cosanza, Italy Corresponding Authors: Prof. Qusay Alsalhy; qusay_alsalhy@yahoo.com; Nano-filtration membranes (NF) have several properties that give to their worth for application in industry. For example, plurality of the NF membranes have molecular weight cut-off of about 200-1000 Dalton, which is go between the traditional reverse osmosis (RO) membranes and the ultrafiltration (UF) membranes. There are many methods employed in the synthesis of composite NF membranes, for example, vapor deposition, plasma-initiated and photo-initiated polymerization, radiation and atom transfer radical polymerization, dip coating and vacuum coating method, interfacial polymerization, electron beam irradiation, resin-filled chelating, and in situ amines cross-linking. In this study, it is reported the preparation of composite PVA-NF membranes by dip-coating of PVA on the poly(vinyl chloride) (PVC) hollow fibers which was prepared in previous work. The coating solution with different concentrations of PVA is considered as a good candidate for the synthesis of composite NF membrane. Moderate performance have been obtained from the composite NF membrane prepared from 0.5 to 1.5 wt.% PVA coating solution by dip-coating process for 90 min at 60ºC and cross-linking with PVC/PS membranes. The thickness of the coated layer of the composite NF membranes is increased with increase of PVA concentration. The difference in performance for three NF membranes is attributed to the difference in structural morphology of the membranes. Also, it can be conclude that the rejection and permeation flux of three types of composite NF membranes were affected by concentration of PVA in coated solution and results to increase of permeation flux and decrease of solutes rejection with increase of PVA concentration. The order of their rejections is CaCl2 > NaCl. The membrane has a high rejection to monovalent and divalent salts and can be used to water purification. Conclusions Objectives Measured the performance of the novel PVA composite hollow-fibers for evaluating both flux and solute rejection. .