A1 Journal article (refereed)
Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent (2021)
Russo, F., Ursino, C., Sayinli, B., Koyuncu, I., Galiano, F., & Figoli, A. (2021). Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent. Clean Technologies, 3(4), 761-786. https://doi.org/10.3390/cleantechnol3040045
JYU authors or editors
Publication details
All authors or editors: Russo, Francesca; Ursino, Claudia; Sayinli, Burcu; Koyuncu, Ismail; Galiano, Francesco; Figoli, Alberto
Journal or series: Clean Technologies
eISSN: 2571-8797
Publication year: 2021
Publication date: 19/10/2021
Volume: 3
Issue number: 4
Pages range: 761-786
Publisher: MDPI AG
Publication country: Switzerland
Publication language: English
DOI: https://doi.org/10.3390/cleantechnol3040045
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/79609
Abstract
In this work, Rhodiasolv® PolarClean was employed as a more sustainable solvent for the preparation of poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) flat sheet membranes via phase inversion technique by coupling vapour induced phase separation (VIPS) and non-solvent induced phase separation (NIPS) processes. Preliminary calculations based on Hansen solubility parameters well predicted the solubilization of the polymer in the selected solvent. The effect of exposure time on humidity and the influence of polyethylene glycol (PEG), polyvinyl pyrrolidone (PVP) and sulfonated polyether sulfone (S-PES) on membrane properties and performance, were evaluated. Three different coagulation bath compositions were also explored. The obtained membranes, prepared using a more sustainable approach, were compared with those produced with the traditional toxic solvent N-methyl-2-pyrrolidone (NMP) and characterised in terms of morphology, porosity, wettability, pore size, surface roughness and mechanical resistance. The potential influence of the new solvent on the crystallinity of PVDF-HFP-based membranes was also evaluated by infrared spectroscopy. The adjustment of the parameters investigated allowed tuning of the membrane pore size in the microfiltration (MF) and ultrafiltration (UF) range resulting in membranes with various morphologies. From the water permeability and rejection tests, performed with methylene blue dye, the prepared membranes showed their potentiality to be used in MF and UF applications.
Keywords: solvents; plastics technology; foils (films); polymer chemistry; green chemistry
Free keywords: green solvents; PolarClean; PVDF-HFP membrane preparation
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 1
