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Abstract：
Highly permselective nanostructured membranes are desirable for the energy-efficient molecular sieving on the subnanometer scale. The nanostructure construction and charge functionalization of the membranes are generally carried out step by step through the conventional layer-by-layer coating strategy, which inevitably brings about a demanding contradiction between the permselective performance and process efficiency. For the first time, we report the concurrent construction of the well-defined molecular sieving architectures and tunable surface charges of nanofiltration membranes through precisely controlled release of the nanocapsule decorated polyethyleneimine and carbon dioxide. This novel strategy not only substantially shortens the fabrication process but also leads to impressive performance (permeance up to 37.4 L m-2 h-1 bar-1 together with a rejection 98.7% for Janus Green B-511 Da) that outperforms most state-of-art nanofiltration membranes. This study unlocks new avenues to engineer next-generation molecular sieving materials simply, precisely, and cost efficiently.
摘要：
高度选择性渗透的纳米结构膜对于亚纳米级的节能分子筛是理想的。膜的纳米结构构造和电荷官能化通常通过常规的逐层涂覆策略逐步进行，这不可避免地带来了选择性能和过程效率之间的矛盾。第一次,我们报告了通过精确控制纳米胶囊装饰的聚乙烯亚胺和二氧化碳的释放，同时构建了定义明确的分子筛结构和可调的纳滤膜表面电荷。这种新颖的策略不仅大大缩短了制造过程，而且还带来了令人印象深刻的性能（渗透率高达37.4Lm-2h-1bar-1，对JanusGreenB-511Da的截留率为98.7％），优于大多数国家最先进的纳滤膜。这项研究为简单地设计下一代分子筛材料开辟了新的途径，准确地说,和成本效益。
