Improved pervaporation efficiency of thin-film composite polyamide membranes fabricated through acetone-assisted interfacial polymerization

Acetone is added as a cosolvent to the water phase for interfacial polymerization. A 50 wt% aqueous acetone is conducive to optimizing sorption of dietheyeleneimine. Acetone-assisted interfacial polymerization enhances the performance of membranes. •Promoting the separation efficiency of pervaporati...

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Bibliographic Details
Published in:Chemical engineering research & design 2021-01, Vol.165, p.375-385
Main Authors: De Guzman, Manuel Reyes, Ang, Micah Belle Marie Yap, Yeh, Yu-Lin, Yang, Hong-Li, Huang, Shu-Hsien, Lee, Kueir-Rarn
Format: Article
Language:English
Subjects:
Acetone
Alcohol dehydration
Aqueous solutions
Diethylene triamine
Efficiency
Hydrolyzed polyacrylonitrile
Interfacial polymerization
Membranes
Pervaporation
Polyacrylonitrile
Polyamide
Polyamide resins
Polymerization
Separation
Studies
Substrates
Thin films
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Summary:Acetone is added as a cosolvent to the water phase for interfacial polymerization. A 50 wt% aqueous acetone is conducive to optimizing sorption of dietheyeleneimine. Acetone-assisted interfacial polymerization enhances the performance of membranes. •Promoting the separation efficiency of pervaporation membranes is a must to meet the growing demands of society. In this study, acetone-assisted interfacial polymerization was employed to produce thin-film composite (TFC) pervaporation membranes with improved performance. Two monomers were considered—diethylenetriamine (DETA) and trimesoyl chloride (TMC); they reacted with each other to form a thin polyamide layer, which was deposited on a hydrolyzed polyacrylonitrile (HPAN) substrate. Aqueous solutions containing different concentrations of acetone were used to dissolve DETA. Introducing acetone as a cosolvent of water enhanced the sorption of DETA in the HPAN support. It also altered and improved the physicochemical properties of the TFC membranes. An optimum concentration of 50 wt% aqueous acetone solution was established. Through acetone-assisted interfacial polymerization, a TFC membrane was then fabricated, and it exhibited a high separation efficiency: permeation flux = 1641 ± 134 g∙m−2 h−1 and water concentration in the permeate = 98%–99% (feed =70 wt% aqueous isopropanol solution). Moreover, the modified TFC membrane displayed a high separation performance at a wide range of operating conditions.
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2020.11.016