Polyethersulfone hollow fiber membranes prepared with Polarclean® as a more sustainable solvent

Ursino, Claudia; Russo, Francesca; Ferrari, Raffaele; Santo, Maria Penelope De; Nicolò, E. Di; He, Tianbai; Galiano, Francesco; Figoli, Alberto

doi:10.1016/j.memsci.2020.118216

Cited by 42 publications

(18 citation statements)

References 34 publications

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“…This can be related to the different viscosity of the dope solutions prepared with the two solvents. The viscosity of PolarClean, in fact, is 9 mPa*s which is much higher than that of NMP (1.67 mPa*s) [16,38]. For this reason, the dope solution prepared with PolarClean, at the same polymer concentration and temperature, presented a higher viscosity than that prepared with NMP.…”

Section: Effect Of the Solventmentioning

confidence: 90%

“…PolarClean has already been proposed as a solvent for the preparation of PES based membranes in flat sheet and hollow fiber configuration [15,16] by NIPS, and for the preparation of PVDF flat sheet membranes [17] and hollow fibers [18] by TIPS at high temperatures (140-160 • C). However, from an industrial point of view, NIPS, due to its versatility, is the best technique to be employed for the preparation of polymeric membranes.…”

Section: Introductionmentioning

confidence: 99%

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Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent

et al. 2021

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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.

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Section: Effect Of the Solventmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent

et al. 2021

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“…Seminal works started to explore a series of more sustainable or fully green solvents such as triethyl phosphate (TEP) [10], dimethyl isosorbide (DMI) [11], Rhodiasolv® PolarClean [12,13], ethyl lactate [14], p-Cymene [15] and Cyrene™ [16] to be used for the preparation of more sustainable membranes using common polymers (e.g. PES and PVDF).…”

Section: Introductionmentioning

confidence: 99%

Sustainable fabrication and pervaporation application of bio-based membranes: Combining a polyhydroxyalkanoate (PHA) as biopolymer and Cyrene™ as green solvent

Tomietto

Russo

Galiano

et al. 2022

Journal of Membrane Science

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Within the prospect to develop a more sustainable solution for the membrane fabrication sector, this work aims to investigate a new combination of bio-based materials, including a polyhydroxyalkanoate (PHA) as a polymer and Cyrene™ as a solvent, for the phase inversion process. The herein studied poly(hydroxybutyrate-co-hydroxyvalerate) (PHBHV) is a microbial biopolymer with excellent biocompatible, biodegradable and solvent resistance properties; while Cyrene™ is a non-toxic, biodegradable and renewable alternative to most of the traditionally used polar aprotic solvents.Several parameters of the phase inversion process were studied in order to identify the different membrane microstructure possibilities and thus their final performances. The various studied process parameters include the evaporation time before coagulation, the use of different traditional and green additives, the concentration of polymer and additives into the dope solution and the molecular weight of the additives. Polyethylene glycol (PEG), ACCEPTED MANUSCRIPT -CLEAN COPY 2 polyvinylpyrrolidone (PVP) and an epoxidized broccoli vegetable oil (EBO) were successfully used as pore former agents for these membranes. Developed membranes were fully characterized in terms of morphology, topography, surface wettability, pore size, porosity, thermal degradation, mechanical resistance and stability. After all, membranes exhibiting different architectures (from porous to dense) were obtained. In order to prove their applicability, dense membranes were finally successfully applied in pervaporation (PV) for the separation of an organic/organic azeotropic mixture.

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“…Emerging organic solvents were explored for membrane production and the obtained preliminary results have shown as their use can really benefit the innovation sector [ 28 ]. Among them, methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (Polarclean) [ 29 , 30 , 31 , 32 , 33 , 34 ] Cyrene™ [ 35 , 36 , 37 , 38 ], dimethyl isosorbide [ 39 ], triethyl phosphate [ 40 , 41 , 42 , 43 , 44 ], diethylene glycol monoethyl ether acetate [ 45 ], glycerol triacetate (triacetin) [ 46 ], acetyl tributyl citrate [ 47 ], triethylene glycol diacetate [ 48 ], acetyl triethyl citrate [ 47 ], triethyl citrate [ 47 ] were proposed as non-toxic solvents for poly(vinylidene fluoride) (PVDF) membrane production through phase inversion. Carner et al [ 38 ] reported the use of several greener solvents, including ethyl acetate, 2-methyltetrahydrofuran (2-methylTHF) and Cyrene™ for the preparation of polymer inclusion membranes.…”

Section: Introductionmentioning

confidence: 99%

Tamisolve® NxG as an Alternative Non-Toxic Solvent for the Preparation of Porous Poly (Vinylidene Fluoride) Membranes

et al. 2021

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Tamisolve® NxG, a well-known non-toxic solvent, was used for poly(vinylidene fluoride) (PVDF) membranes preparation via a non-solvent-induced phase separation (NIPS) procedure with water as a coagulation bath. Preliminary investigations, related to the study of the physical/chemical properties of the solvent, the solubility parameters, the gel transition temperature and the viscosity of the polymer–solvent system, confirmed the power of the solvent to solubilize PVDF polymer for membranes preparation. The role of polyvinylpyrrolidone (PVP) and/or poly(ethylene glycol) (PEG), as pore former agents in the dope solution, was studied along with different polymer concentrations (10 wt%, 15 wt% and 18 wt%). The produced membranes were then characterized in terms of morphology, thickness, porosity, contact angle, atomic force microscopy (AFM) and infrared spectroscopy (ATR-FTIR). Pore size measurements, pore size distribution and water permeability (PWP) tests placed the developed membranes in the ultrafiltration (UF) and microfiltration (MF) range. Finally, PVDF membrane performances were investigated in terms of rejection (%) and permeability recovery ratio (PRR) using methylene blue (MB) in water solution to assess their potential application in separation and purification processes.

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Polyethersulfone hollow fiber membranes prepared with Polarclean® as a more sustainable solvent

Cited by 42 publications

References 34 publications

Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent

Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent

Sustainable fabrication and pervaporation application of bio-based membranes: Combining a polyhydroxyalkanoate (PHA) as biopolymer and Cyrene™ as green solvent

Tamisolve® NxG as an Alternative Non-Toxic Solvent for the Preparation of Porous Poly (Vinylidene Fluoride) Membranes

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