Novel hydrophobic PVDF membranes prepared by nonsolvent induced phase separation for membrane distillation

Pagliero, Marcello; Bottino, A.; Comite, Antonio; Costa, Camilla

doi:10.1016/j.memsci.2019.117575

Cited by 106 publications

(58 citation statements)

References 42 publications

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“…The reported mean removal was 8.5%, 11.7%, and 18.7% for Cd, Cu, Ni, and Pb, respectively. [55][56][57][58][59] To test the impact and effectiveness of the MD process using the prepared membranes, it is interesting to note that similar trend of flux over time was noted as can be seen in Figure S2. Doped SBS membrane had the highest water flux followed by the neat SBS, doped PVDF, and pristine PVDF, respectively.…”

Section: Dcmd Performancementioning

confidence: 82%

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Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Khraisheh

Almomani

2020

Int J Energy Res

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In this study, styrene-butadiene-styrene (SBS) was used to develop a novel functionalized electrospun membrane for the effective treatment of heavy metals in direct contact membrane distillation (DCMD) applications. Functionalization was achieved by the addition (doping) of the super hydrophobic Al 2 O 3 nanoparticles (Al NPs) within the matrix of the membrane during electrospinning. Neat (pristine nondoped) and doped SBS membranes were tested. The performance of the SBS membranes were also compared with fabricated polyvinylidene fluoride membranes with and without doping with Al NPs. The membrane characteristics were tested via Fourier transform infrared, scanning electron microscopy, pore size, and porosity investigations. The wettability of the membranes was investigated with respect to the liquid entry pressure (LEP) and contact angle. The performance of the membranes was tested in a DCMD setting for its ability to treat water containing salt (NaCl) and heavy metals (Cr (VI), Cd, Pb) in various concentration in a single and multicomponent systems. The SBS member exhibited excellent hydrophobicity characteristics such as a high LEP (16.87 psi) and contact angle (141 ± 2 ). It also had superior permeate flux rate compared to the other prepared membranes (54.4 LMH). The addition of the Al 2 O 3 nanoparticles enhance the performance of the membranes substantially.Slight decline in the flux was observed after 14 hours of continuous operating time that could be attributed to agglomeration, adsorption, or temperature polarization effects. The SBS AL NPs membranes also demonstrated excellent flux for saline solutions of varied concentrations with 99% salt rejection.

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Section: Dcmd Performancementioning

confidence: 82%

“…However, in the study by Mahdavi et al, Cu, Ni, and Pb were adsorbed using Al 2 O 3 at a pH of 5. The reported mean removal was 8.5%, 11.7%, and 18.7% for Cd, Cu, Ni, and Pb, respectively 55‐59 …”

Section: Resultsmentioning

confidence: 99%

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Khraisheh

Almomani

2020

Int J Energy Res

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“…Pore size and porosity largely determine the efficiency of separation n [ 87 ], and these properties of the membrane are controlled by the fabrication technique [ 88 ]. These techniques include phase separation processes [ 89 ], stretching, track etching [ 90 ] and sintering [ 91 ] among others. For phase separation processes that use immersion precipitation like the nonsolvent-induced phase separation (NIPS) technique, liquid–liquid demixing controls the morphology of the membrane [ 87 ].…”

Section: Resultsmentioning

confidence: 99%

Nanohybrid Membrane Synthesis with Phosphorene Nanoparticles: A Study of the Addition, Stability and Toxicity

et al. 2020

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Phosphorene is a promising candidate as a membrane material additive because of its inherent photocatalytic properties and electrical conductance which can help reduce fouling and improve membrane properties. The main objective of this study was to characterize structural and morphologic changes arising from the addition of phosphorene to polymeric membranes. Here, phosphorene was physically incorporated into a blend of polysulfone (PSf) and sulfonated poly ether ether ketone (SPEEK) doping solution. Protein and dye rejection studies were carried out to determine the permeability and selectivity of the membranes. Since loss of material additives during filtration processes is a challenge, the stability of phosphorene nanoparticles in different environments was also examined. Furthermore, given that phosphorene is a new material, toxicity studies with a model nematode, Caenorhabditis elegans, were carried out to provide insight into the biocompatibility and safety of phosphorene. Results showed that membranes modified with phosphorene displayed a higher protein rejection, but lower flux values. Phosphorene also led to a 70% reduction in dye fouling after filtration. Additionally, data showed that phosphorene loss was negligible within the membrane matrix irrespective of the pH environment. Phosphorene caused toxicity to nematodes in a free form, while no toxicity was observed for membrane permeates.

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“…There are various methodologies that are feasible for the fabrication of membranes for MD applications, including electrospinning [ 27 ], phase inversion [ 28 ], supercritical assisted phase inversion [ 29 ], and mechanical stretching methods [ 25 ]. Many polymers, such as polypropylene (PP) [ 30 ], polyethylene (PE) [ 31 ], polytetrafluoroethylene (PTFE) [ 32 ], poly(vinylidene fluoride) (PVDF) [ 33 ], polysulfone [ 34 ], and polydimethylsiloxane [ 35 ], are well-known materials for MD applications due to their good chemical resistance, thermal stability, and low thermal conductivity [ 36 , 37 , 38 , 39 ]. However, there are many drawbacks that make these materials practically unsatisfactory for MD applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of a Novel Poly(vinylidene fluoride-co-hexafluoropropylene)/Poly(ethersulfone) Blend Membrane Fabricated Using an Innovative Method of Mixing Electrospinning and Phase Inversion

2021

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In this work, a novel polymeric membrane was innovated in terms of composition and preparation techniques. A blend of poly(vinylidene fluoride-co-hexafluoropropylene) (PcH) and poly(ethersulfone) (PES) (18 wt.% total polymer concentration) was prepared using a N-methylpyrrolidone (NMP) and N, N-Dimethylformamide (DMF) solvents mixture, while Lithium chloride (0.05–0.5 wt%) was used as an additive. The electrospinning and phase inversion techniques were used together to obtain a novel membrane structure. The prepared membranes were characterized using scanning electron microscope imaging, energy dispersive X-Ray, differential scanning calorimeter, thermogravimetric analysis, and Fourier transfer infrared spectroscopy-attenuated total reflectance analyses. Moreover, the static water contact angle, membrane thickness, porosity, surface roughness as well as water vapor permeability were determined. ImageJ software was used to estimate the average fiber diameter. Additionally, the effect of the change of PcH concentration and coagulation bath temperature on the properties of the fabricated membrane was studied. The novel developed membrane has shown a good efficiency in terms of properties and features, as a membrane suitable for membrane distillation (MD); a high porosity (84.4% ± 0.6), hydrophobic surface (136.39° ± 3.1 static water contact angle), and a water vapor permeability of around 4.37 × 10−5 g·m/m2·day·Pa were obtained. The prepared membrane can be compared to the MD membranes commercially available in terms of properties and economic value.

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Novel hydrophobic PVDF membranes prepared by nonsolvent induced phase separation for membrane distillation

Cited by 106 publications

References 42 publications

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Nanohybrid Membrane Synthesis with Phosphorene Nanoparticles: A Study of the Addition, Stability and Toxicity

Preparation and Characterization of a Novel Poly(vinylidene fluoride-co-hexafluoropropylene)/Poly(ethersulfone) Blend Membrane Fabricated Using an Innovative Method of Mixing Electrospinning and Phase Inversion

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Novel hydrophobic PVDF membranes prepared by nonsolvent induced phase separation for membrane distillation

Cited by 106 publications

References 42 publications

Electrospun Al 2 O 3 hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Electrospun Al 2 O 3 hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Nanohybrid Membrane Synthesis with Phosphorene Nanoparticles: A Study of the Addition, Stability and Toxicity

Preparation and Characterization of a Novel Poly(vinylidene fluoride-co-hexafluoropropylene)/Poly(ethersulfone) Blend Membrane Fabricated Using an Innovative Method of Mixing Electrospinning and Phase Inversion

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Product

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Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation