Green Blends Based on Ionic Liquids with Improved Performance for Membrane Technology: Perspectives for Environmental Applications

Present research was directed towards the development of new high-performance and cost-effective polysulfone membranes (PSFQ) by introducing ionic liquids (ILs—Cyphos 101 IL and Aliquat 336) into their matrix. Variation of ILs was performed with the aim to find the one that brings new properties and...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-07, Vol.23 (14), p.7961
Main Authors: Filimon, Anca, Dobos, Adina Maria, Dumbrava, Oana, Doroftei, Florica, Lupa, Lavinia
Format: Article
Language:English
Subjects:
Aliquat
Chloride
Decontamination
Diclofenac
Efficiency
Environmental impact
Ionic liquids
Ions
Membrane separation
Membranes
Nonsteroidal anti-inflammatory drugs
Permeability
Pollutants
Polymers
Rheological properties
Rheology
Selectivity
Solvents
Ultrafiltration
Viscosity
VOCs
Volatile organic compounds
Water purification
Water treatment
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Summary:Present research was directed towards the development of new high-performance and cost-effective polysulfone membranes (PSFQ) by introducing ionic liquids (ILs—Cyphos 101 IL and Aliquat 336) into their matrix. Variation of ILs was performed with the aim to find the one that brings new properties and improves the functionality and selectivity of PSFQ membranes in ultrafiltration processes. Based on the obtained results of the rheological study, we established the compatibility of compounds and optimal content of the used ILs, namely 3 wt% and 15 wt% Cyphos 101 IL and compositions varying between 3 and 15 wt % Aliquat 336. Results indicated that the ILs acted as plasticizers when they were added to the system, a helpful aspect in processing membranes used in water decontamination. The efficiency and performance of the membranes were evaluated by their use in the treatment of diclofenac (DCF)-containing waters. Membranes obtained from PSFQ/Aliquat 336 solution containing 15 wt% IL exhibited a 97% removal degree of DCF in the treatment process of 50 mL solution containing 3 mg/L DCF. The separation efficiency was kept constant for four filtration/cleaning cycles. The results indicated an improvement in membrane performance as the amount of IL in their structure increased, which confirms the potential for application in water treatment processes.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23147961