The Ionic Liquid-H2O Interface: A New Platform for the Synthesis of Highly Crystalline and Molecular Sieving Covalent Organic Framework Membranes
文献类型：期刊论文
| 作者 | Gao, Shuaiqi4; Li, Zhiyong4; Yang, Yingying4; Wang, Zhenzhen4; Wang, Yanlei1; Luo, Shuangjiang1; Yao, Kaisheng2; Qiu, Jikuan4; Wang, Huiyong4; Cao, Li3 |
| 刊名 | ACS Applied Materials and Interfaces
 |
| 出版日期 | 2021-08-04 |
| 卷号 | 13期号:30页码:36507-36516 |
| 关键词 | Crystallinity - Membranes - Monomers - Organic polymers - Dichloromethane - Ionic liquids - Organic solvents - Phase interfaces |
| ISSN号 | 19448244 |
| DOI | 10.1021/acsami.1c08789 |
| 英文摘要 | Covalent organic frameworks (COFs) are highly porous crystalline polymers with uniform pores and large surface areas. Combined with their modular design principle and excellent properties, COFs are an ideal candidate for separation membranes. Liquid-liquid interfacial polymerization is a well-known approach to synthesize membranes by reacting two monomers at the interface. However, volatile organic solvents are usually used, which may disturb the liquid-liquid interface and affect the COF membrane crystallinity due to solvent evaporation. Simultaneously, the domain size of the organic solvent-water interface, named the reaction zone, can hardly be regulated, and the diffusion control of monomers for favorable crystallinity is only achieved in the water phase. These drawbacks may limit the widespread applications of liquid-liquid interfacial polymerization to synthesize diverse COF membranes with different functionalities. Here, we report a facile strategy to synthesize a series of imine-linked freestanding COF membranes with different thicknesses and morphologies at tunable ionic liquid (IL)-H2O interfaces. Due to the H-bonding of the catalysts with amine monomers and the high viscosity of the ILs, the diffusion of the monomers was simultaneously controlled in water and in ILs. This resulted in the exceptionally high crystallinity of freestanding COF membranes with a Brunauer-Emmett-Teller (BET) surface area up to 4.3 times of that synthesized at a dichloromethane-H2O interface. By varying the alkyl chain length of cations in the ILs, the interfacial region size and interfacial tension could be regulated to further improve the crystallinity of the COF membranes. As a result, the as-fabricated COF membranes exhibited ultrahigh permeance toward water and organic solvents and excellent selective rejection of dyes. 漏 2021 American Chemical Society. |
| 学科主题 | Polymerization |
| 项目编号 | This work is supported by the National Natural Science Foundation of China (U1704251, 21733011, and 22073024), the National Key Research and Development Program of China (2017YFA0403 101), the 111 Project (D17007), the Program for Universities of Henan Province Science & Technology Innovation Talents (Grant No. 21HASTIT003), and the Innovation Academy for Green Manufacture, CAS (IAGM2020DA01). |
| 出版者 | American Chemical Society |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60367]  |
| 作者单位 | 1.Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Innovation Academy for Green Manufacture, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 2.School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan; 471023, China 3.Chemical Engineering Program, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal; 23955-6900, Saudi Arabia 4.Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan; 453007, China |
| 推荐引用方式 GB/T 7714 | Gao, Shuaiqi,Li, Zhiyong,Yang, Yingying,et al. The Ionic Liquid-H2O Interface: A New Platform for the Synthesis of Highly Crystalline and Molecular Sieving Covalent Organic Framework Membranes[J]. ACS Applied Materials and Interfaces,2021,13(30):36507-36516. |
| APA | Gao, Shuaiqi.,Li, Zhiyong.,Yang, Yingying.,Wang, Zhenzhen.,Wang, Yanlei.,...&Wang, Jianji.(2021).The Ionic Liquid-H2O Interface: A New Platform for the Synthesis of Highly Crystalline and Molecular Sieving Covalent Organic Framework Membranes.ACS Applied Materials and Interfaces,13(30),36507-36516. |
| MLA | Gao, Shuaiqi,et al."The Ionic Liquid-H2O Interface: A New Platform for the Synthesis of Highly Crystalline and Molecular Sieving Covalent Organic Framework Membranes".ACS Applied Materials and Interfaces 13.30(2021):36507-36516. |
入库方式： OAI收割
来源：过程工程研究所
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