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Rapid solvent transport and tunable molecular sieving enabled by ultrathin alkyl-chain-engineered polyamide membranes
Chemical Engineering Science ( IF 4.1 ) Pub Date : 2024-11-10 , DOI: 10.1016/j.ces.2024.120925 Shuyun Gu, Linlong Zhou, Jin Zhang, Dan Wang, Siyao Li, Zhi Xu
Chemical Engineering Science ( IF 4.1 ) Pub Date : 2024-11-10 , DOI: 10.1016/j.ces.2024.120925 Shuyun Gu, Linlong Zhou, Jin Zhang, Dan Wang, Siyao Li, Zhi Xu
Organic solvent nanofiltration (OSN) has emerged as a promising separation technology for the chemical and pharmaceutical industries due to its low energy consumption and eco-friendliness. However, traditional polyamide-based membranes used in OSN often exhibit low permeance for organic solvents and it is difficult to precisely control the pore structure. In this study, we report a facile approach to fabricate ultrathin alkyl-chain-engineered polyamide nanofilms via free-standing interfacial polymerization for high-performance selective separations. The membranes were prepared via a “two birds one stone” strategy, enabled by post-treatment in aliphatic amine solution, simultaneously regulating the pore size and optimizing the membrane chemical property. This enables the membrane with high solvent permeance, especially for non-polar solvents (heptane at ∼22.2 L m−2h−1 bar−1, toluene at ∼16.8 L m−2h−1 bar−1), while maintaining excellent molecular sieving capability. Notably, the molecular weight cut-off (MWCO) can be regulated by introducing alkyl chains of varying lengths to their pores. The exceptional solvent permeance and tunable molecular sieving property make the membranes promising for high value-added products purification in the pharmaceutical industry and crude oil separation.
中文翻译:
通过超薄烷基链工程聚酰胺膜实现快速溶剂传输和可调分子筛分
有机溶剂纳滤 (OSN) 由于其低能耗和环保性,已成为化学和制药行业一种很有前途的分离技术。然而,用于 OSN 的传统聚酰胺基膜通常对有机溶剂的渗透性较低,并且难以精确控制孔隙结构。在这项研究中,我们报道了一种通过独立界面聚合制造超薄烷基链工程聚酰胺纳米薄膜的简单方法,以实现高性能选择性分离。膜是通过“两鸟一石”策略制备的,通过在脂肪胺溶液中进行后处理,同时调节孔径并优化膜的化学性质。这使得膜具有高溶剂渗透性,特别是对于非极性溶剂(庚烷为 ∼22.2 L m-2 h-1 bar-1,甲苯为 ∼16.8 L m-2 h-1 bar-1),同时保持出色的分子筛分能力。值得注意的是,分子量截留值 (MWCO) 可以通过将不同长度的烷基链引入其孔中来调节。出色的溶剂渗透性和可调的分子筛分性能使该膜有望用于制药行业的高附加值产品净化和原油分离。
更新日期:2024-11-10
中文翻译:
通过超薄烷基链工程聚酰胺膜实现快速溶剂传输和可调分子筛分
有机溶剂纳滤 (OSN) 由于其低能耗和环保性,已成为化学和制药行业一种很有前途的分离技术。然而,用于 OSN 的传统聚酰胺基膜通常对有机溶剂的渗透性较低,并且难以精确控制孔隙结构。在这项研究中,我们报道了一种通过独立界面聚合制造超薄烷基链工程聚酰胺纳米薄膜的简单方法,以实现高性能选择性分离。膜是通过“两鸟一石”策略制备的,通过在脂肪胺溶液中进行后处理,同时调节孔径并优化膜的化学性质。这使得膜具有高溶剂渗透性,特别是对于非极性溶剂(庚烷为 ∼22.2 L m-2 h-1 bar-1,甲苯为 ∼16.8 L m-2 h-1 bar-1),同时保持出色的分子筛分能力。值得注意的是,分子量截留值 (MWCO) 可以通过将不同长度的烷基链引入其孔中来调节。出色的溶剂渗透性和可调的分子筛分性能使该膜有望用于制药行业的高附加值产品净化和原油分离。