研究了一系列化学成分系统变化的磺化聚醚醚砜/聚醚砜（SPEES/PES）超滤膜，通过量化铀酰阳离子（UC）结合量来确定净表面电荷。将膜样品暴露于0.01M醋酸铀酰（UA）水溶液中两小时，然后在去离子水中进行大量冲洗。用液体闪烁计数法定量膜结合放射性UC。结果表明，在合成过程中，UC结合与添加到聚合物混合物中的SPEES/PES嵌段共聚物的量成正比（Pearson R2=0.96）。用季铵盐表面活性剂十二烷基三甲基溴化铵对膜表面进行预处理，导致UC结合减少，这与膜表面的磺酸基和铀酰物种之间发生离子相互作用一致。 包括11个参考文献、表格、图表。

A series of experimental sulfonated polyether-ethersulfone/polyethersulfone (SPEES/PES) ultrafiltration membranes, whose chemical compositions were systematically varied, were examined to determine net surface charge by quantifying the amount of uranyl cation (UC) binding. Membrane samples were exposed to a 0.01M aqueous solution of uranyl acetate (UA) for two hours followed by extensive rinsing in deionized water. Membrane bound radioactive UC was quantified using liquid scintillation counting. Results indicated that UC binding increased in direct proportion to the amount of SPEES/PES block copolymer added to the polymer mixture during synthesis (Pearson R2=0.96). Pretreatment of the membrane surface with dodecyltrimethylammonium bromide, a quaternary ammonium surfactant, resulted in a decrease in UC binding, consistent with the occurrence of ionic interactions between the sulfonate groups on the membrane surface and the uranyl species. Includes 11 references, table, figures.