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首页> 外文期刊>RSC Advances >CO2 separation membranes with high permeability and CO2/N-2 selectivity prepared by electrostatic self-assembly of polyethylenimine on reverse osmosis membranes
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CO2 separation membranes with high permeability and CO2/N-2 selectivity prepared by electrostatic self-assembly of polyethylenimine on reverse osmosis membranes

机译：具有高渗透性和CO 2 / N-2选择性的CO 2分离膜通过在反渗透膜上的聚乙烯亚胺静电自组装制备的选择性

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摘要

CO2 separation membranes prepared by green, simple, and efficient methods have faced great challenges. In this work, a facilitated transport membrane with high CO2 permeance and CO2/N-2 selectivity was prepared by an aqueous self-assembly method using commercially available polyethylenimine (PEI) and reverse osmosis (RO) membranes as the assembled molecule and substrate, respectively. When the PEI concentration was 50 mg L-1, the prepared membranes showed excellent permeability and selectivity. The effects of PEI concentration, pH of electrostatic-assembly and operating conditions on the membrane performance were systemically studied. The prepared membrane was also analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and contact angle measurements to determine the adsorption and assembly kinetics of PEI. For CO2, the facilitated transport mechanism was dominant because of the presence of amine groups from PEI molecules, while N-2 transport was accomplished by a simple solution-diffusion mechanism.
机译：通过绿色，简单，有效的方法制备的二氧化碳分离膜面临巨大的挑战。在这项工作中，通过使用市售的聚乙胺（PEI）和作为组装分子和基质的渗透性渗透（RO）膜，通过含水自组装方法制备具有高二氧化碳渗透和CO 2 / N-2选择性的促进式运输膜。 。当PEI浓度为50mg L-1时，制备的膜显示出优异的渗透性和选择性。系统地研究了PEI浓度，静电组件的pH和操作条件的影响。还通过扫描电子显微镜（SEM），X射线光电子能谱（XPS）和接触角测量来分析制备的膜，以确定PEI的吸附和组装动力学。对于CO 2，由于来自PEI分子的胺基团，促进的传输机制是显性的，而N-2通过简单的溶液扩散机构完成。

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  • 来源
    《RSC Advances》 |2017年第24期|共10页
  • 作者

    Sun Jing; Yi Zhuan; Zhao Xueting; Zhou Yong; Gao Congjie;

  • 作者单位

    Zhejiang Univ Technol Dept Ocean Hangzhou 310014 Zhejiang Peoples R China;

    Zhejiang Univ Technol Dept Ocean Hangzhou 310014 Zhejiang Peoples R China;

    Zhejiang Univ Technol Dept Ocean Hangzhou 310014 Zhejiang Peoples R China;

    Zhejiang Univ Technol Dept Ocean Hangzhou 310014 Zhejiang Peoples R China;

    Zhejiang Univ Technol Dept Ocean Hangzhou 310014 Zhejiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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