SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (3): 501-508.DOI: 10.1016/j.cjche.2017.07.017

• Separation Science and Engineering • Previous Articles     Next Articles

Partial pore blockage and polymer chain rigidification phenomena in PEO/ZIF-8 mixed matrix membranes synthesized by in situ polymerization

Xiaoli Ding1,2,3, Xu Li1,2,3, Hongyong Zhao1,2,3,4, Ran Wang1,2,3, Runqing Zhao1,2,3, Hong Li1,2,3, Yuzhong Zhang1,2,3   

  1. 1 State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tianjin Polytechnic University, Tianjin 300387, China;
    2 Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    3 Institute of Separation Material and Process Control, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
    4 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2017-03-27 Revised:2017-07-16 Online:2018-04-18 Published:2018-03-28
  • Contact: Xiaoli Ding, Hongyong Zhao
  • Supported by:

    Supported by the National Natural Science Foundation of China (21776217, 21506160), Tianjin Research Program of Application Foundation and Advanced Technology (14JCQNJC06400), the Scientific Research Foundation for the Returned Overseas Chinese Scholars (48), the Science and Technology Plans of Tianjin (16PTSYJC00110).

Partial pore blockage and polymer chain rigidification phenomena in PEO/ZIF-8 mixed matrix membranes synthesized by in situ polymerization

Xiaoli Ding1,2,3, Xu Li1,2,3, Hongyong Zhao1,2,3,4, Ran Wang1,2,3, Runqing Zhao1,2,3, Hong Li1,2,3, Yuzhong Zhang1,2,3   

  1. 1 State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tianjin Polytechnic University, Tianjin 300387, China;
    2 Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    3 Institute of Separation Material and Process Control, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
    4 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • 通讯作者: Xiaoli Ding, Hongyong Zhao
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21776217, 21506160), Tianjin Research Program of Application Foundation and Advanced Technology (14JCQNJC06400), the Scientific Research Foundation for the Returned Overseas Chinese Scholars (48), the Science and Technology Plans of Tianjin (16PTSYJC00110).

Abstract: Nanostructured zeolitic imidazolate frameworks (ZIF-8) was incorporated into the mixture of poly (ethylene glycol) methyl ether acrylate (PEGMEA) and pentaerythritol triacrylate (PETA) to synthesize mixed matrix membranes (MMMs) by in situ polymerization for CO2/CH4 separation. The solvent-free polymerization between PEGMEA and PETA was induced by UV light with 1-hydroxylcyclohexyl phenyl ketone as initiator. The chemical structural characterization was performed by Fourier transform infrared spectroscopy. The morphology was characterized by scanning electron microscope. The average chain-to-chain distance of the polymer chains in MMMs was investigated by X-ray diffraction. The thermal property was evaluated by differential scanning calorimetry. The CH4 and CO2 gas transport properties of MMMs are reported. The relationship between gas permeation-separation performances or physical properties and ZIF-8 loading is also discussed. However, the permeation-separation performance was not improved in Robeson upper bound plot compared with original polymer membrane as predicted. The significant partial pore blockage and polymer rigidification effect around the ZIFs confirmed by the increase in glass temperature and the decrease in the d-spacing, were mainly responsible for the failure in performance improvement, which offset the high diffusion induced by porous ZIF-8.

Key words: Mixed matrix membrane, Partial pore blockage, Polymer chain rigidification, CO2 separation

摘要: Nanostructured zeolitic imidazolate frameworks (ZIF-8) was incorporated into the mixture of poly (ethylene glycol) methyl ether acrylate (PEGMEA) and pentaerythritol triacrylate (PETA) to synthesize mixed matrix membranes (MMMs) by in situ polymerization for CO2/CH4 separation. The solvent-free polymerization between PEGMEA and PETA was induced by UV light with 1-hydroxylcyclohexyl phenyl ketone as initiator. The chemical structural characterization was performed by Fourier transform infrared spectroscopy. The morphology was characterized by scanning electron microscope. The average chain-to-chain distance of the polymer chains in MMMs was investigated by X-ray diffraction. The thermal property was evaluated by differential scanning calorimetry. The CH4 and CO2 gas transport properties of MMMs are reported. The relationship between gas permeation-separation performances or physical properties and ZIF-8 loading is also discussed. However, the permeation-separation performance was not improved in Robeson upper bound plot compared with original polymer membrane as predicted. The significant partial pore blockage and polymer rigidification effect around the ZIFs confirmed by the increase in glass temperature and the decrease in the d-spacing, were mainly responsible for the failure in performance improvement, which offset the high diffusion induced by porous ZIF-8.

关键词: Mixed matrix membrane, Partial pore blockage, Polymer chain rigidification, CO2 separation