Separation Performance and Stability of PVDF-co-HFP/Alkylphosphonium Dicyanamide Ionic Liquid Gel-Based Membrane in Pervaporative Separation of 1-Butanol

Autor:	Santosh Choudhary, Hercules R. Cascon
Rok vydání:	2013
Předmět:	Process Chemistry and Technology General Chemical Engineering Butanol Filtration and Separation General Chemistry chemistry.chemical_compound Membrane chemistry Chemical engineering Polymer chemistry Ionic liquid Copolymer medicine Pervaporation Phosphonium Swelling medicine.symptom Dicyanamide
Zdroj:	Separation Science and Technology. 48:1616-1626
ISSN:	1520-5754 0149-6395
DOI:	10.1080/01496395.2012.762025
Popis:	In this study, a membrane prepared by gelling trihexyl(tetradecyl)phosphonium dicyanamide ionic liquid (IL) with poly(vinylidene fluoride-co-hexafluoropropylene) copolymer is tested for performance and stability in pervaporative separation of 1-butanol. Feed concentration and temperature affected separation performance mainly through plasticizing and swelling effects in the membrane which promoted liquid-like transport behavior. Microscale IL-in-polymer networks formed within the gel matrix where the neat IL possibly functioned as conventional liquid membrane. IL gelling has significantly improved the membrane operational lifetime to ∼80 h, a significant improvement on the ∼10 h shown by a simple supported IL membrane counterpart. The instability was consequent to polymer-IL incompatibility and so further investigations are underway to resolve this issue.
Databáze:	OpenAIRE
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