Polymer Ethyl Cellulose Membrane Materials Developed And High-performance Liquid Chromatography In The Study Of Its Performance

On the basis of the preferential sorption-capillary flow mechanism proposed by Sourirajan, the membrane interfacial equilibrium condition in reverse osmosis can be simulated by the HPLC experiment. The HPLC data on retention times can be used for quantitatively characterizing the dynamic nature on solid polymer membrane surface and physicochemical properties of polymer-solution interface. The experimental technique in this paper can offer definite guidelines for the choice of appropriate membrane material and the better understanding of reverse osmosis separation mechanism. Our work as following:1. The present status and development trends of membrane separation technology are reported detailed in this chapter and the modification methods of polymer membrane are discussed.2. Ethyl cellulose membrane material has produced in physical modification method. The fundamental characteristics of reverse osmosis on EC membrane can be correlated with HPLC experimental conditions. By using EC membrane material as column packing, double-distilled water as mobile phase, the retention times(tR') are measured with suitable inorganic and organic compound as solutes.3. Complying with the retention times, the partition coefficient of the solute(KA') and the ratio of the surface excess concentration of solute( )with the concentration of the parent fraction(CAb) are calculated . The data reflect the equilibrium effect of reverse osmosis and indicate the strength of the interaction between the solute and the membrane material.