Fangyi Xu, Shuxin Zhao, Junjie Song, Yu Peng, Baowei Su
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引用次数: 0
摘要
有机溶剂纳滤（OSN）技术因其低能耗和环保性而在分离有机溶液混合物方面具有优势。共价有机框架（COF）是提高溶剂传输效率和确保有机溶剂纳滤膜精确分子筛分的良好候选材料。在这项研究中，对苯二胺（Pa）和 1,3,5-三甲氧基苯（Tp）被用来在聚酰亚胺基底表面通过界面聚合（IP）原位构建 TpPa COF 表层。经过随后的交联和活化步骤，就得到了一种 TpPa/ 聚酰亚胺（PI）OSN 膜。在优化制造过程中，这种 OSN 膜的乙醇渗透率为 58.0 LMH/MPa，快速绿色 FCF（FGF）阻隔率为 96.2%，纯正己烷渗透率为 102.0 LMH/MPa。此外，TpPa/PI OSN 膜还具有良好的耐溶剂性，因此适用于有机溶剂的分离、纯化和浓缩。
Organic Solvent Nanofiltration Membrane with In Situ Constructed Covalent Organic Frameworks as Separation Layer.
Organic solvent nanofiltration (OSN) technology is advantageous for separating mixtures of organic solutions owing to its low energy consumption and environmental friendliness. Covalent organic frameworks (COFs) are good candidates for enhancing the efficiency of solvent transport and ensuring precise molecular sieving of OSN membranes. In this study, p-phenylenediamine (Pa) and 1,3,5-trimethoxybenzene (Tp) are used to construct, in situ, a TpPa COF skin layer via interfacial polymerization (IP) on a polyimide substrate surface. After subsequent crosslinking and activation steps, a kind of TpPa/polyimide (PI) OSN membrane is obtained. Under optimized fabrications, this OSN membrane exhibits an ethanol permeance of 58.0 LMH/MPa, a fast green FCF (FGF) rejection of 96.2%, as well as a pure n-hexane permeance of 102.0 LMH/MPa. Furthermore, the TpPa/PI OSN membrane exhibits good solvent resistance, which makes it suitable for the separation, purification, and concentration of organic solvents.
MembranesChemical Engineering-Filtration and Separation
CiteScore
6.10
自引率
16.70%
发文量
1071
审稿时长
11 weeks
期刊介绍：
Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
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