Wetting Study of Microporous Membrane in Surfactant Solutions

• 作 者: Liyun Cui Zhongwei Ding Xia Wu Yunpeng li Liying Liu
• 机 构: College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029
• 出 处: 第七届京津地区研究生膜技术论坛暨北京膜学会换届大会
• 发表日期: 2012年9期

　　Membrane separation has become to be one of the most promising industrial methods because of its energy conservation and environmental protection.In practice operation of membrane separation,liquid used in the process often can wet the hydrophobic membrane to penetrate into partial micropores of the membrane.Partial wetting makes the resistances to mass transfer of membrane phase significantly increase.To study the wetting kinetics in mass transfer,we take the spontaneous imbibition in surfactant solutions as the micro model.Aqueous solution containing surfactants can spontaneously permeate into hydrophobic porous substrates,and the mechanism is the adsorption of surfactant molecules on the surface of hydrophobic wall in front of the moving meniscus which make imbibitions of the surfactant solutions into porous possible.In this study,we consider the imbibitions of surfactant solutions into hydrophobic microporous membrane based on the capillary penetration mechanism.It has the similar wetting line trend with capillary imbibitions.The relative wetting amount increases with the rise of surfactant concentration and temperature.Different from the imbibitions into hydrophobic porous,in membrane wetting process,we should take the pore size distribution,the pore shape and the cross wetting area into considerations.