Currently, many polymeric membranes are poorly tolerated in harsh (strong polar aprotic) solvents like dimethylformamide (DMF) and N-methylpyrrolidone (NMP) and are not applicable to organic solvent nanofiltration (OSN). In this study, we combined the oxidized poly (arylene sulfide sulfone) (OPASS) supports with excellent organic solvent resistance and the spiral-ring polyester interfacial polymerization (IP) layer together to fabricate ultra-resistant and high permeance membranes for OSN. The tetramethyl-1,1′-spirobisindane-6,6′diol (SBI), a contorted diphenol monomer with a spiral-ring structure, was preferentially selected from six types of polyphenols based on molecular simulations and experimental results. It was conducted to react with trimesoyl chloride (TMC) via interfacial polymerization to yield a polyester separation layer of thin film composites (TFC). Investigating the different alkali ratios and types revealed that the alkali added in the aqueous phase to improve the solubility of the SBI could cause hydrolysis of the polyester layer generated by IP, which led to increased membrane permeance and reduced rejection, and the more alkali and the stronger the alkali used, the more severe the hydrolysis. Besides, DMF activation treatment to the TFC membrane improved the ethanol permeance by at least four times while maintaining high congo red rejection. As a result, combining the effects of alkali and DMF activation, the representative TFC membranes fabricated in our work exhibited excellent permeance of 21.5±1.3, 9.0±1.1 L m⁻² h⁻¹ bar⁻¹ for DMF and NMP, respectively, and high rejection rates (≥ 93%) for congo red (Mw 696.7 Da), higher than the earlier reports. This research presents a new and straightforward approach to developing TFC membranes with high-efficiency filtration capabilities, suitable for harsh organic solvent separation applications.

目前，许多聚合物膜在二甲基甲酰胺（DMF）和N-甲基吡咯烷酮（NMP）等刺激性（强极性非质子）溶剂中的耐受性很差，并且不适用于有机溶剂纳滤（OSN）。在本研究中，我们将具有优异耐有机溶剂性的氧化聚芳硫醚砜（OPASS）支撑体与螺旋环聚酯界面聚合（IP）层结合在一起，制备了用于OSN的超耐高渗透膜。基于分子模拟从六种多酚中优先选择出具有螺旋环结构的扭曲二酚单体四甲基-1,1'-螺二茚烷-6,6'二醇（SBI）和实验结果。通过界面聚合与均苯三甲酰氯（TMC）反应，生成薄膜复合材料（TFC）的聚酯分离层。对不同碱配比和类型的研究表明，水相中为提高SBI溶解度而添加的碱会导致IP生成的聚酯层发生水解，从而导致膜渗透性增加和截留率降低，并且碱越多，截留率越低。使用的碱越强，水解越严重。此外，对 TFC 膜进行 DMF 活化处理将乙醇渗透性提高了至少四倍，同时保持了较高的刚果红排斥率。结果，结合碱和 DMF 活化的影响，我们工作中制造的代表性 TFC 膜表现出 21.5±1.3、9.0±1 的优异渗透性。^{DMF 和 NMP 分别为-2}  h ^-1 bar ^-1，刚果红 (Mw 696.7 Da) 的废品率较高 (≥ 93%)，高于早期报告。这项研究提出了一种新的、简单的方法来开发具有高效过滤能力的 TFC 膜，适用于严酷的有机溶剂分离应用。