Characterization and Gas Permeation Properties of Synthesized Polyurethane-Polydimethylsiloxane / Polyamide 12-b-Polytetramethylene Glycol Blend Membranes

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• 作者：Eshagh Vakili ; Mohammad Ali Semsarzadeh ; Behnam Ghalei ; Morteza Khoshbin…
• 关键词：Gas separation ; Membrane ; Polyamide ; 12 ; b ; PTMG ; Polyurethane
• 刊名：SILICON
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：8
• 期：1
• 页码：75-85
• 全文大小：2,277 KB
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• 作者单位：Eshagh Vakili (1)
  Mohammad Ali Semsarzadeh (2)
  Behnam Ghalei (1) (2)
  Morteza Khoshbin (3)
  Hadi Nasiri (3)
  
  1. Polymer group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran
  2. Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-Honmachi, Sakayo-ku, Kyoto, 606-8501, Japan
  3. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Inorganic Chemistry
  Materials Science
  Organic Chemistry
  Polymer Sciences
  Biomedical Engineering
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1876-9918

文摘

Blend membranes of synthesized polyurethane (PU) based on toluene diisocyanate (TDI), polydimethylsiloxane (PDMS) and polytetramethylene glycol (PTMG) with polyamide 12-b- polytetramethylene glycol (PA12-b-PTMG) were prepared by a solution casting technique. The heterogeneous microstructures of the blend membranes (PU /PA12-b-PTMG) were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Gas transport properties were determined for O₂, N₂, CH₄, and CO₂ gases and the obtained permeabilities were correlated with polymer properties and morphology of the membranes. Comparison of the results with that of the pure PU membrane indicates that the blend membranes had higher permeability to CO₂, but lower permeability to O₂, N₂ and CH₄ gases, and, therefore, had higher values of CO₂/N₂ and CO₂/CH₄ ideal gas pair selectivities. The blend membrane with 20 % (wt) PA12-b-PTMG showed the highest CO₂ permeability (≈105 Barrer) compared to the PU and other blend membranes. In the blend membranes with 5–20 % (wt) PA12-b-PTMG contents an enhancement of CO₂/CH₄ (≈10) and CO₂/N ₂ (≈52) selectivities was observed. The experimental permeabilities of the blend membranes were compared with the calculated permeabilities based on a modified additive logarithmic model. Keywords Gas separation Membrane Polyamide-12-b-PTMG Polyurethane