Department of Nanostructured Materials, Leibniz Institute of Polymer Research Dresden, Hohe Str 6, 01069 Dresden, Germany.
J Hazard Mater. 2013 May 15;252-253:401-12. doi: 10.1016/j.jhazmat.2013.02.052. Epub 2013 Mar 4.
A diverse set of supported multilayer assemblies with controllable surface charge, hydrophilicity, and permeability to water and solute was fabricated by pressure driven permeation of poly(sodium 4-styrenesulfonate) (PSS) and poly(diallyldimethylammonium chloride) (PDDA) solution through poly(ethylene terephthalate) (PET) track-etched membranes. The polyelectrolyte multilayer fabrication was confirmed by means of FTIR, SEM, AFM, ellipsometry, zetapotential, and contact angle characterization. The prepared membranes were characterized in terms of their pure water permeability, flux recovery, and resistance to organic and biofouling properties. The antifouling behavior of the membranes was assessed in terms of protein adsorption and antibacterial behavior. Finally, the membranes were tested for rejection of selected water soluble dyes to establish their usefulness for organic contaminant removal from water. The membranes were highly selective and capable of nearly complete rejection of congo red with sufficiently high fluxes. The feasibility of regenerating the prepared membranes fouled by protein was also demonstrated and good flux recovery was obtained. In summary, the multilayer approach to surface and pore modification was shown to enable the design of membranes with the unique combination of desirable separation characteristics, regenerability of the separation layer, and antifouling behavior.
通过聚对苯二甲酸乙二醇酯（PET）刻蚀膜的压力驱动渗透，制备了具有可控表面电荷、亲水性以及对水和溶质的渗透性的多种支持的多层组件。通过 FTIR、SEM、AFM、椭偏仪、动电位和接触角特性，证实了聚电解质多层的形成。根据纯水透过率、通量恢复、抗有机和生物污染性能对制备的膜进行了表征。通过蛋白质吸附和抗菌行为评估了膜的抗污染性能。最后，通过对选定的水溶性染料的截留测试，评估了膜对有机污染物去除的有用性。这些膜具有高选择性，能够以足够高的通量实现刚果红的近乎完全截留。还证明了通过蛋白质污染的制备膜的再生的可行性，并且获得了良好的通量恢复。总之，表面和孔修饰的多层方法能够设计出具有理想分离特性、分离层可再生性和抗污染性能的独特组合的膜。
