The Effect of Surface Modified Membrane in the Oil Separation
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In this study, the surface modified microfiltration membrane was carried out with flux and electrokinetic measurements in order to reduce the fouling of membrane in the oil separation. The polypropylene membranes were chemically modified for improving flux on the surface with formaldehyde and sodium hydroxide catalysts. The hydrophobic polypropylene membranes changed surface to hydrophillic. The modified membrane showed much higher flux than the original polypropylene membrane. The zeta potentials were varied as the function of pH, ionic strength and concentrations in the presence of surfactants. The zeta potentials of the modified membrane were shifted to more negative values. The higher the negative value of the zeta potential, the higher the membrane permeation rate. The zeta potential results were affected by the increasing SDS concentrations. The SDS may affect the attachment of oil droplets by lowering the interfacial tension.
Abstract
In this study, the surface modified microfiltration membrane was carried out with flux and electrokinetic measurements in order to reduce the fouling of membrane in the oil separation. The polypropylene membranes were chemically modified for improving flux on the surface with formaldehyde and sodium hydroxide catalysts. The hydrophobic polypropylene membranes changed surface to hydrophillic. The modified membrane showed much higher flux than the original polypropylene membrane. The zeta potentials were varied as the function of pH, ionic strength and concentrations in the presence of surfactants. The zeta potentials of the modified membrane were shifted to more negative values. The higher the negative value of the zeta potential, the higher the membrane permeation rate. The zeta potential results were affected by the increasing SDS concentrations. The SDS may affect the attachment of oil droplets by lowering the interfacial tension.
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