Fully aromatic polyester thin film composite (TFC) nanofiltration (NF) membranes were successfully prepared on polysulfone support through interfacial polymerization (IP) of trimesoyl chloride (TMC) with bi-functional resorcinol (Res), tri-functional phloroglucinol (Phg) and their mixtures. The functionality of phenol greatly influenced the properties and performances of the membranes. Most notably, the active layer thickness (estimated from cross-sectional SEM images) and pore radius (from Hagen–Poiseuille pore flow model) decreased with an increasing amount of Phg. The best salt rejection and permeate flux were obtained with the membranes prepared from 2 : 1 (w/w) Phg : Res (TFC5) or pure Phg (TFC6). The membranes were negatively charged under operating pH conditions, as a result of which divalent anions were efficiently rejected whereas divalent cation rejection was considerably lower. TFC5 and TFC6 membranes showed promise for arsenic removal, giving 70–90% rejection of Na₂HAsO₄ depending on the ionic strength and pH of the feed water.

中文翻译：

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苯酚功能性对全芳族聚酯薄膜复合纳滤膜特征和性能的影响†

通过偏苯三甲酰氯（TMC）与双功能间苯二酚（Res），三功能间苯三酚（Phg）的界面聚合（IP）成功地在聚砜载体上制备了全芳香族聚酯薄膜复合（TFC）纳滤（NF）膜。混合物。苯酚的功能极大地影响了膜的性能和性能。最值得注意的是，活性层厚度（根据横截面SEM图像估算）和孔半径（根据Hagen-Poiseuille孔流模型）随Phg含量的增加而降低。用2：1（w / w）Phg：Res（TFC5）或纯Phg（TFC6）制备的膜可获得最佳的脱盐率和渗透通量。膜在操作pH条件下带负电荷，结果是有效地排斥了二价阴离子，而降低了二价阳离子。TFC5和TFC6膜显示出去除砷的希望，可提供70-90％的Na截留率₂ HAsO ₄取决于进水的离子强度和pH值。