Fabrication and Characterization of Electrospun Polysulfone (PSF)/Organo-Montmorillonite (O-MMT) Nanostructured Membranes

Aquino, Ruth R.; Tolentino, Marvin S.; Angeles, Joren V.; Millano, Hershey Azelle

doi:10.4028/www.scientific.net/msf.916.125

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Today, using nanoparticles as additives in the polymeric composite membrane fabrication is a cutting-edge area of membrane science. Nanoparticles, such as carbon nanotubes [118], multi-walled carbon nanotubes [119], silica nanoparticles [120,121], silver nanoparticles [122], titanium oxide nanoparticles [123] and ZnO nanoparticles [124], have been used as fillers in polymer composite membranes and the large surface area to volume ratio resulted in strong interfacial interactions between the nanoparticles and the surrounding polymer [125,126,127]. Table 4 reports on typical additives used for PS composite membranes.…”

Section: Methods Of Preparationmentioning

confidence: 99%

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

2019

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Porous polymeric membranes have emerged as the core technology in the field of separation. But some challenges remain for several methods used for membrane fabrication, suggesting the need for a critical review of the literature. We present here an overview on porous polymeric membrane preparation and characterization for two commonly used polymers: polysulfone and poly (vinylidene fluoride). Five different methods for membrane fabrication are introduced: non-solvent induced phase separation, vapor-induced phase separation, electrospinning, track etching and sintering. The key factors of each method are discussed, including the solvent and non-solvent system type and composition, the polymer solution composition and concentration, the processing parameters, and the ambient conditions. To evaluate these methods, a brief description on membrane characterization is given related to morphology and performance. One objective of this review is to present the basics for selecting an appropriate method and membrane fabrication systems with appropriate processing conditions to produce membranes with the desired morphology, performance and stability, as well as to select the best methods to determine these properties.

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Section: Methods Of Preparationmentioning

confidence: 99%

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

2019

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“…The introduction of hydrophilic polymers and other additives such as inorganic salts has gained some ground in membrane preparation, more and more studies are focusing on the incorporation of other types of additives for the development of novel polymer membranes with improved performance. Among those additives, namely, carbon nanotubes (Kumar et al, 2019), silica nanoparticles (Aquino et al, 2018;Julian et al, 2019) and amphiphilic copolymers (Zhao et al, 2013) can be cited. Those novel membranes have shown to have enhanced properties such as higher fouling-resistance (Yi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Artificial water channels-embedded PVDF membranes for direct contact membrane distillation and ultrafiltration

Nursiah,

Musteata,

Cerneaux

et al. 2023

Front. Membr. Sci. Technol.

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Innovative self-supported flat-sheet polyvinylidene fluoride (PVDF) membranes were developed incorporating amphiphilic I-quartet Artificial Water Channels (AWCs) and applied for membrane distillation (MD) and Dyes Ultrafiltration (UF). The presence of AWCs was aimed to increase the amount of water within hydrophobic PVDF pores increasing water permeability and preserving high selectivity and consequently to improve the MD and dyes UF performances. We explored novel strategies in which water channels structures contribute to water cluster stabilization and the increase of water (vapors or liquid) within hydrophobic pore structures. With this novel strategy in mind, three PVDF polymer grades with different molecular weights as well as the variation of their mass concentration as well as of AWCs were studied to shed in light their influence on the water permeability using a dead-end filtration setting. An enhanced water permeability of 75.3 L.m−2.h−1.bar−1 was attained for the PVDF-AWC hybrid membrane prepared using 16 wt% PVDF (530,000 g/mol) and 0.05 wt% AWCs when compared with a reference membrane with a water permeability of 30.6 L.m−2.h−1.bar−1. The MD performances of both membranes were assessed using a 35 g/L NaCl aqueous solution to yield a salt rejection of 95.3% and 85.2%, respectively. Furthermore, both the reference and the PVDF-AWC membranes showed improved separation performance in terms of rejection efficiency and dye permeability for binary dyes mixture as compared to single dyes. Among all the tested membranes, while methylene blue was completely removed in both cases, the 14 wt% PVDF membrane incorporating 0.075 wt% AWC showed a methyl orange rejection efficiency of up to 99.8% compared to 98.4% for its reference membrane. This hybrid membrane also displayed an almost doubled filtered dye feed permeability of 84 L.m−2.h−1.bar−1, compared to 40 L.m-2.h−1.bar−1 for its 14 wt% PVDF reference membrane.

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“…[27][28][29][30] Despite the above-mentioned potentials for PSU/Clay membranes, there are a few reports on this subject. 20,22,31 Only one of them has explored electrospun PSU/Clay membranes with the focus on the effect of clay content on the properties of their product. 31 Considering the lack of comprehensive and systematic studies on PSU/Clay membranes, the current study aims to fill this gap by presenting a thorough RSM-designed investigation on electrospun PSU/Clay membranes and determine how process parameters including clay concentration, electrospinning rate, and voltage as well as solution properties can affect the properties of PSU membranes.…”

Section: Introductionmentioning

confidence: 99%

Improved water flux in optimized electrospun polysulfone/nanoclay membranes

2022

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Water crisis is undoubtedly one of the main global challenges and water membranes can be used to tackle this issue. In this study, electrospun polysulfone (PSU)/nanoclay membranes were fabricated. The fabrication process was optimized to achieve desirable fibers using response surface methodology, considering nanoclay concentration, electrospinning feeding rate, and voltage as the influencing factors on the membrane properties. SEM images was used to determine the average fiber diameter and imperfection factor of the fibrous composites and their hydrophilicity was assessed based on their water contact angle (CA) values. A suitable model was proposed for each property to predict its variation with the influencing parameters. The results showed that the voltage and feed rate are directly related to the average fiber diameter and CA of the membranes. Moreover, introducing hydrophilic nanoclay to the membranes improved their wettability. The optimum properties were achieved in the membrane containing 5.63 wt% nanoclay, which was electrospun at a feed rate and voltage of 0.7 mL/h, and 16 kV, respectively. Comparing the mechanical properties and water flux performance of pure PSU membranes with the optimal sample confirmed that the presence of nanoclay improved the mechanical strength and toughness of the membranes and enhanced the attainable water flux.

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Fabrication and Characterization of Electrospun Polysulfone (PSF)/Organo-Montmorillonite (O-MMT) Nanostructured Membranes

Cited by 6 publications

References 8 publications

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

Artificial water channels-embedded PVDF membranes for direct contact membrane distillation and ultrafiltration

Improved water flux in optimized electrospun polysulfone/nanoclay membranes

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