Data for: Synthesis, characterization and performance of polystyrene/PMMA blend membranes for potential water treatment

PS membranes were prepared from polymeric blends of PS and PMMA via a phase inversion induced by an immersion precipitation in water coagulation baths. The effects of the casting parameters (e.g., solvent selection, the composition of the coagulation bath) and the type of polystyrene (substituents at the aromatic ring, tacticity) on the morphology and water permeation flux were studied. The findings reveal that modified PS promoting instantaneous demixing with NMP/water systems result in membranes with macrovoids while the addition of 2% of PS-r-PMMA results in membranes with high water fluxes. The membranes morphologies were governed by a trade-off between thermodynamic and kinetic aspects. The antibacterial effect of (aPS)70-co-aPS(I)30/PMMA-based membrane was examined using static and cross-flow systems. These results illustrate the diversity in the design of these PS/PMMA based membranes and highlight the possibility to control the polymer chemistry for tailoring specific morphology, permeation and antibacterial properties for the desired function.

本数据集所涉聚苯乙烯（Polystyrene, PS）膜以聚苯乙烯与聚甲基丙烯酸甲酯（Polymethyl Methacrylate, PMMA）的聚合物共混物为原料，通过浸入水相凝固浴引发相转化的浸没沉淀法制备得到。本研究考察了流延工艺参数（如溶剂选择、凝固浴组成）以及聚苯乙烯类型（芳环取代基、立构规整度）对膜形貌与水渗透通量的影响。研究结果表明，与N-甲基吡咯烷酮（N-Methyl-2-pyrrolidone, NMP）/水体系适配的改性聚苯乙烯可促进瞬时相分离，所制备的膜具有大空腔结构；而添加2%的聚苯乙烯-无规-聚甲基丙烯酸甲酯（PS-r-PMMA）则可获得高水渗透通量的膜。膜的形貌由热力学与动力学因素的权衡关系决定。本研究采用静态系统与错流系统，对(aPS)70-co-aPS(I)30/PMMA基膜的抗菌性能进行了测试。上述结果展示了此类PS/PMMA基膜的设计多样性，并凸显了通过调控聚合物化学结构，定制所需形貌、渗透性能与抗菌性能以实现特定功能的可行性。