Improvement of CO sub(2)/CH sub(4) separation characteristics of polyethersulfone by modifying with polydimethylsiloxane and nano-silica

Porous asymmetric polyethersulfone (PES) hollow fiber membrane was fabricated via dry/wet spinning process. The spinning dope consisted of 18 wt.% PES in N-methyl-2-pyrrolidone (NMP) solvent. Distilled water was used as bore fluid to make hollow fiber membrane without inner skin layers. Then, a skin...

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Bibliographic Details
Published in:Journal of polymer research 2012-07, Vol.19 (7), p.1-8
Main Authors: Sharif, Alireza, Koolivand, Hadis, Khanbabaie, Ghader, Hemmati, Mahmood, Aalaie, Jamal, Kashani, Mehdi Razzaghi, Gheshlaghi, Ali
Format: Article
Language:English
Subjects:
Carbon dioxide
Fibers
Membranes
Nanocomposites
Nanomaterials
Nanostructure
Polyethersulfones
Silicone resins
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Summary:Porous asymmetric polyethersulfone (PES) hollow fiber membrane was fabricated via dry/wet spinning process. The spinning dope consisted of 18 wt.% PES in N-methyl-2-pyrrolidone (NMP) solvent. Distilled water was used as bore fluid to make hollow fiber membrane without inner skin layers. Then, a skin layer consisting of poly (4-vinyl pyridine), PVP, silicon rubber PDMS and silica nanoparticles (nano-SiO sub(2)) was transferred to the PES substrate surface by means of a dip coating method, leading to a nanocomposite hollow fiber membrane. Investigation of the cross-section of the prepared membranes via scanning electronic microscopy (SEM) revealed a good adhesion between the top dense layer and the PES substrate. Moreover, tensile strength and ultimate elongation of the pristine membrane were increased 2.3 and 5 times, respectively, when the PVP/PDMS/nano-SiO sub(2) coating was formed on its outer surface. Finally, according to the results of gas permeation tests, the prepared nanocomposite membrane, with a CO sub(2)/CH sub(4) selectivity of 45 and CO sub(2) permeance of 102 GPU would be an attractive candidate for applications such as natural gas purification and control of anthropogenic carbon dioxide emissions.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-012-9916-3