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

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...

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Bibliographic Details
Published in:SILICON 2016, Vol.8 (1), p.75-85
Main Authors: Vakili, Eshagh, Semsarzadeh, Mohammad Ali, Ghalei, Behnam, Khoshbin, Morteza, Nasiri, Hadi
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemistry
Chemistry and Materials Science
Environmental Chemistry
Fourier transforms
Gas permeation
Gas transport
Gases
Ideal gas
Infrared spectroscopy
Inorganic Chemistry
Lasers
Materials Science
Membranes
Optical Devices
Optics
Original Paper
Permeability
Photonics
Polyamide resins
Polydimethylsiloxane
Polymer Sciences
Polytetramethylene glycol
Polyurethane resins
Synthesis
Toluene
Toluene diisocyanates
Transport properties
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Summary: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 O 2 , N 2 , CH 4 , and CO 2 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 CO 2 , but lower permeability to O 2 , N 2 and CH 4 gases, and, therefore, had higher values of CO 2 /N 2 and CO 2 /CH 4 ideal gas pair selectivities. The blend membrane with 20 % (wt) PA12-b-PTMG showed the highest CO 2 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 CO 2 /CH 4 (≈10) and CO 2 /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.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-015-9312-9