聚酰胺
界面聚合
纳滤
膜
材料科学
纳米
聚合
单体
化学工程
纳米孔
渗透
纳米技术
相位反转
渗透
作者
Yuanzhe Liang,Yuzhang Zhu,Cheng Liu,Kueir-Rarn Lee,Wei-Song Hung,Zhenyi Wang,Youyong Li,Menachem Elimelech,Jian Jin,Shihong Lin
标识
DOI:10.1038/s41467-020-15771-2
摘要
Abstract Separating molecules or ions with sub-Angstrom scale precision is important but technically challenging. Achieving such a precise separation using membranes requires Angstrom scale pores with a high level of pore size uniformity. Herein, we demonstrate that precise solute-solute separation can be achieved using polyamide membranes formed via surfactant-assembly regulated interfacial polymerization (SARIP). The dynamic, self-assembled network of surfactants facilitates faster and more homogeneous diffusion of amine monomers across the water/hexane interface during interfacial polymerization, thereby forming a polyamide active layer with more uniform sub-nanometre pores compared to those formed via conventional interfacial polymerization. The polyamide membrane formed by SARIP exhibits highly size-dependent sieving of solutes, yielding a step-wise transition from low rejection to near-perfect rejection over a solute size range smaller than half Angstrom. SARIP represents an approach for the scalable fabrication of ultra-selective membranes with uniform nanopores for precise separation of ions and small solutes.
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