The present study CA/chitosan blend membrane was prepared by solvent vaporization method. The morphology of membrane was studied using Scanning Electron Microscopy (SEM) and the thermal stability using Thermo Gravimetric Analysis (TGA); and the physicochemical properties such as water content, kinetic of membrane flux, permeability and flow were investigated. Parameters on which membrane selectivity depends, are also discussed. It has also been explored the effect of electrolyte solution on ion transport properties of cellulose acetate /chitosan membrane under a concentration gradient. Water uptake in the absence and presence of electrolyte were carried out. The thermal stability of Cellulose acetate /Chitosan blends membrane to provide information regarding weight loss of the prepared membrane represent some significant steps i.e. water loss from membrane phase, followed by degradation process. First weight loss occurred at 80 to 130 0 C which conform evaporation of residual water from the membrane. The second degradation stage was noticed around 360.36 0 C, which are due to amino and hydroxyl groups. The work has been done with the object to investigate the transport properties of cellulose acetate /chitosan synthetic membrane, conducted under a concentration gradient .More ever, the water uptake and conductance experiment were carried out to investigate the effect of those electrolyte solutions. As time increases, the density of membrane functional groups increases and approaches to narrow proximity to each other. Membrane water retention capacity varies electrolyte to electrolyte. In present case it is 83.6 % for 0.01 M, NaCl; 50.9 % for 0.01M, MgCl2 and 44.0 % for 0.01M BaCl2.

The influence of surfactant on cellulose acetate/chitosan membrane has been investigated. A basic approach to cellulose acetate/chitosan membrane is also mentioned. Nonionic surfactants are disrupted the normal permeability of the characteristic membrane. Electrochemical characterization such as conductance, flow, flux and permeability are measured in various concentrations of the electrolyte and surfactants. Membrane potential is determined by the combination of the properties of ions of the electrolyte, surfactant and membrane. The synthesized membrane was found to be cation selective with measured membrane potential found to be negative in all cases. The value of membrane potential was varying in different concentration of the electrolyte and surfactant. The Teorell Meyer and Sievers (TMS) theoretical method was employed for calculating the Transport number, perm selectivity and fixed charge density of the membrane by using the data of membrane potential across normal and surfactant modified membrane with electrolytic solution of NaCl. The variation of fixed density and perm selectivity also depends on the concentration of the electrolyte and surfactant (Tween 20 and Tween 60).

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