Effect of Polyvinyl Alcohol Modified Silica Particles on the Physical and Gas Separation Properties of the Polyurethane Mixed Matrix Membranes

Silicon based particles were prepared using tetraethoxysilane (TEOS) as a silica monomer, and low concentration of polyethylene oxide-polypropylene oxide block copolymer (pluronic) with polyvinyl alcohol (PVA) as templating agents. The synthesized particles showed higher polarity compare with conven...

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Bibliographic Details
Published in:SILICON 2019-06, Vol.11 (3), p.1451-1460
Main Authors: Ghalei, Behnam, Isfahani, Ali Pournaghshband, Nilouyal, Somaye, Vakili, Eshagh, Salooki, Mahdi Koolivand
Format: Article
Language:English
Subjects:
Block copolymers
Carbon dioxide
Chemistry
Chemistry and Materials Science
Environmental Chemistry
Fourier transforms
Gas separation
Gas transport
Infrared spectroscopy
Inorganic Chemistry
Lasers
Materials Science
Membranes
Optical Devices
Optics
Original Paper
Photomicrographs
Photonics
Polyethylene oxide
Polymer Sciences
Polypropylene glycol
Polyurethane resins
Polyvinyl alcohol
Scanning electron microscopy
Silicon dioxide
Synthesis
Tetraethyl orthosilicate
Transport properties
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Summary:Silicon based particles were prepared using tetraethoxysilane (TEOS) as a silica monomer, and low concentration of polyethylene oxide-polypropylene oxide block copolymer (pluronic) with polyvinyl alcohol (PVA) as templating agents. The synthesized particles showed higher polarity compare with conventional silica particles. PU/silica mixed matrix membranes (MMMs) were prepared by solution casting technique. The membranes were characterized using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and differential scanning calorimetry (DSC). FT-IR result confirmed the existence of PVA in the final structure of the synthesized silica network. The SEM micrographs indicated an appropriate distribution of silica particles in the polymer matrix. Gas transport properties of membranes were studied for pure CO 2 , CH 4 , O 2 and N 2 gases at 10 bar and 25 ∘ C. The results showed that the permeabilities of CH 4 and CO 2 enhanced whereas that of other gases decreased with increasing the modified silica contents. In the membrane with 10 wt.% silica content, an enhancement of CO 2 /CH 4 ( α ≈ 7.7) and CO 2 /N 2 ( α ≈ 91.4) selectivities was observed.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-018-9959-0