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High-Performance CO_2 Capture through Polymer-Based Ultrathin Membranes

机译：通过基于聚合物的超薄膜高效捕获二氧化碳

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摘要

Thin film composite (TFC) membranes have attracted great research interest for a wide range of separation processes owing to their potential to achieve excellent permeance. However, it still remains challenging to fully exploit the superiority of thin selective layers when mitigating the pore intrusion phenomenon. Herein, a facile and generic interface-decoration-layer strategy collaborating with molecular-scale organic-inorganic hybridization in the selective layer to obtain a high-performance ultrathin film composite (UTFC) membrane for CO2 capture is reported. The interface-decoration layer of copper hydroxide nanofibers (CHNs) enables the formation of an ultrathin selective layer (approximate to 100 nm), achieving a 2.5-fold increase in gas permeance. The organic part in the molecular-scale hybrid material contributes to facilitating CO2-selective adsorption while the inorganic part assists in maintaining robust membrane structure, thus remarkably improving the selectivity toward CO2. As a result, the as-prepared membrane shows a high CO2 permeance of 2860 GPU, superior to state-of-the-art polymer membranes, with a CO2/N-2 selectivity of 28.2. The synergistic strategy proposed here can be extended to a wide range of polymers, holding great potential to produce high-efficiency ultrathin membranes for molecular separation.
机译：薄膜复合（TFC）膜由于具有实现优异渗透性的潜力而引起了广泛的分离工艺研究兴趣。但是，在缓解孔隙侵入现象时，充分利用薄选择层的优势仍然具有挑战性。在本文中，报道了在选择层中与分子尺度的有机-无机杂化相配合的一种简便而通用的界面装饰层策略，从而获得了一种用于捕集二氧化碳的高性能超薄膜复合膜。氢氧化铜纳米纤维（CHN）的界面装饰层能够形成超薄选择层（约100 nm），气体渗透率提高2.5倍。分子级杂化材料中的有机部分有助于促进CO2选择性吸附，而无机部分则有助于维持牢固的膜结构，从而显着提高了对CO2的选择性。结果，所制得的膜表现出2860 GPU的高CO2渗透率，优于最新的聚合物膜，CO2 / N-2选择性为28.2。此处提出的协同策略可以扩展到多种聚合物，具有生产用于分子分离的高效超薄膜的巨大潜力。

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  • 来源
    《Advanced Functional Materials》 |2019年第33期|1900735.1-1900735.9|共9页
  • 作者

    Ji Yufan; Zhang Mengchen; Guan Kecheng; Liu Gongping; Jin Wanqin; Zhao Jing;

  • 作者单位

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

    Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    CO2 capture; interface-decoration layers; molecular-scale organic-inorganic hybridization; nanofibers; ultrathin-film composite membranes;

    机译：CO2捕获;界面装饰层;分子尺度有机 - 无机杂交;纳米纤维;超薄膜复合膜;

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