Poly(ether sulfone) (PES) hollow-fiber membranes prepared from various spinning parameters

Alsalhy, Qusay F.; Salih, Haydar A.; Simone, Silvia De; Zablouk, Mumtaz A.; Drioli, Enrico; Figoli, Alberto

doi:10.1016/j.desal.2014.04.029

Cited by 54 publications

(31 citation statements)

References 28 publications

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“…Based on these assumptions, the PES concentration was reduced from 20% to 18%. Plu F-127 5% was used as an additive; however, H 2 O 2% was also added to the dope, since it was found in previous works that it behaves as an excellent pore former [20,[40][41][42]. Different bore fluid compositions, with PEG or PEG/NMP were also tested in this case (Group 4 in Tables 3 and 4).…”

Section: Blank Pes Fiber Spinning Experiments and Optimization Of Dopmentioning

confidence: 99%

“…In the first group of experiments, polymeric dopes were prepared while keeping constant PES and PEG 400 concentrations, in order to compare the effect of the three additives (PVP K-17, PVP K-30, and Plu F-127). A small percentage of water was also added to the dopes, since it works as an excellent pore former [20,[40][41][42]. Viscosity was measured at 85 • C, since due to water's strong non-solvent nature, demixing may take place at a lower temperature.…”

Section: Polymeric Dope Viscositymentioning

confidence: 99%

“…The produced hollow fibers were kept in a frequently refreshed water bath for 1 day, in order to ensure complete coagulation and remove residual solvent. Then, they were soaked in a glycerol aqueous solution, with a concentration of 30 wt %, for 3-4 h, before drying, in order to avoid the collapse of their porous structure, as previously described elsewhere [20,[40][41][42].…”

Section: Dope Viscosity Measurementsmentioning

confidence: 99%

“…Fiber porosity, ε m , was calculated by measuring the void fraction, i.e., is the volume of the pores divided by the total volume of the membrane, by the gravimetric method described elsewhere [20,[40][41][42].…”

Section: Fiber Porositymentioning

confidence: 99%

“…The composition of the dopes used for the spinning experiments are listed in Table 3. Hollow fibers were produced as described elsewhere [20,[40][41][42], by the dry/wet technique. Detailed spinning conditions of each experiment are reported in Table 4.…”

Section: Dope Viscosity Measurementsmentioning

confidence: 99%

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Preparation and Characterization of Polymeric-Hybrid PES/TiO2 Hollow Fiber Membranes for Potential Applications in Water Treatment

Simone

Galiano

Faccini

et al. 2017

Fibers

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Abstract:In this work, poly(ethersulfone) (PES) ultrafiltration (UF) hollow fibers (HF) were modified by introducing TiO 2 nanoparticles (TiO 2 -NPs) in the polymeric dope, to endow them with photocatalytic properties. Different dope compositions and spinning conditions for producing "blank" PES UF fibers with suitable properties were investigated. PEO-PPO-PEO (Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol, Pluronic ® (Sigma-Aldrich, Milan, Italy) was finally selected as the additive and a suitable dope composition was identified. After the detection of an appropriate dope composition and the optimization of the spinning parameters, PES-TiO 2 HF was produced. The optimized composition was employed for preparing the mixed matrix HF loaded with TiO 2 NPs. The effect of different TiO 2 NP (0.3-1 wt %) concentrations and bore fluid compositions on the fiber morphology and properties were explored. The morphology of the produced fibers was analyzed by Scanning Electron Microscopy (SEM). Fibers were further characterized by measuring: pore size diameters and thickness, porosity, and pure water permeability (PWP). The photocatalytic activity of the new membranes was also tested by UV light irradiation. The model "foulant" methylene blue (MB) was used in order to prove the efficiency of the novel UF membrane for dye photo-degradation.

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Section: Blank Pes Fiber Spinning Experiments and Optimization Of Dopmentioning

confidence: 99%

Section: Polymeric Dope Viscositymentioning

confidence: 99%

Section: Dope Viscosity Measurementsmentioning

confidence: 99%

Section: Fiber Porositymentioning

confidence: 99%

Section: Dope Viscosity Measurementsmentioning

confidence: 99%

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Preparation and Characterization of Polymeric-Hybrid PES/TiO2 Hollow Fiber Membranes for Potential Applications in Water Treatment

Simone

Galiano

Faccini

et al. 2017

Fibers

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Graphene oxide, an effective nanoadditive for a development of hollow fiber nanocomposite membrane with antifouling properties

et al. 2018

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A series of hollow fiber (HF) membranes made from nanocomposites of polyethersulfone (PES) and graphene oxide (GO) at GO concentrations of 0.2%, 0.5%, and 1.0% were prepared by the dry-wet spinning process. The structure and the properties of as-prepared HF membranes were characterized by scanning electron microscopy (SEM); atomic force microscopy (AFM); measurements of contact angle, zeta potential, molecular weight cut-off (MWCO), and porosity; thermogravimetric analysis (TGA); and tensile testing. Long-term filtration tests were performed with the proteins bovine serum albumin (BSA), pepsin, trypsin, and lysozyme, which are common model organic foulants used in membrane fouling studies. The results showed that HF membrane made from PES/GO nanocomposite dope had a water permeability of 30 ± 1.5 Lm −2 hr −1 bar −1 , which is an increase of approximately 36% compared to that of a PES HF membrane. Among the membranes containing GO, the membrane with a 0.5 wt% GO loading exhibited the best antifouling performance, that is, this membrane recovered more than approximately 96% of its initial pure water flux, demonstrating a high resistance to the irreversible fouling. In addition, the same membrane showed an improvement in MWCO, an approximately 15% increase in porosity, along with optimum mechanical and thermal properties. K E Y W O R D Santifouling property, graphene oxide, hollow fiber membrane, nanocomposite

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Modification and ionic stimulation of hollow fiber membrane by electric field for water treatment

Abouelata

Abdallah

Sorour

et al. 2020

J of Applied Polymer Sci

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Hollow fiber membrane (HF) is considered one of the prevalent materials for water treatment; its effectiveness is controlled by permeation and mechanical characteristics. In this study, HF membrane surface was stimulated using electrochemical technique, where binary system of stainless steel cylinder and graphite rod electrodes was used into electrolytic solution of sodium acetate 0.1 M as electrolyte. Two pH of acidic medium (pH = 3.5) and alkaline medium (pH = 8.5) were prepared and different potential between 2 and 10 V were applied. EDX analysis of HF membrane surface revealed the formation of sodium ions on the surface of HF membrane with maximum content of Na+ ions 1.84%. Also, HF membrane surface showed variation of roughness (R a) as, HF membrane surface may undergo distortion by using aggressive conditions of high electric potential (7.5–10 V), The measured raw HF membrane (R a) was 34.8 nm, while, after electrochemical modification in alkaline medium R a showed higher values 36, 37, and 41 nm using 2, 2.5, and 5 V, respectively. While, after electrochemical modification in acidic medium (R a) showed 35, 39, 42, 49, 52 nm for 2, 2.5, 5, 7.5, and 10 V, respectively. Moreover, tensile strength Young's modulus, break stress and break strain were measured after electrochemical modification in both acidic and alkaline mediums and maximum porosity value 76.84% was observed after 30 min in acidic medium.

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Poly(ether sulfone) (PES) hollow-fiber membranes prepared from various spinning parameters

Cited by 54 publications

References 28 publications

Preparation and Characterization of Polymeric-Hybrid PES/TiO2 Hollow Fiber Membranes for Potential Applications in Water Treatment

Preparation and Characterization of Polymeric-Hybrid PES/TiO2 Hollow Fiber Membranes for Potential Applications in Water Treatment

Graphene oxide, an effective nanoadditive for a development of hollow fiber nanocomposite membrane with antifouling properties

Modification and ionic stimulation of hollow fiber membrane by electric field for water treatment

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