Optimization of the synthesis of ultrafiltration asymmetric membranes based on organic polymers

Berradi, Mohamed; Berradi, Omar; Chellouli, Mohamed; Hsissou, Rachid; Bouchti, Mehdi El; Gouri, M. El; Sallek, Brahim; Bachiri, Abderrahim El; Harfi, A. El

doi:10.1016/j.rineng.2020.100116

Cited by 17 publications

(8 citation statements)

References 22 publications

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“…Among these, the gel stage process, 1 casting, 2 wet spinning combined with pyrolysis oxidation, 3 self‐assembly, 4 phase separation, 5 melt spinning, 6 and electrospinning are some of the most often cited 7 . This increase in the number of studies related to membranes production stems from the need to design suitable materials for specific applications, as well as from the close dependence that exists between the membrane structure and the method, process parameters, and materials used 8 …”

Section: Introductionmentioning

confidence: 99%

Hydrolyzed collagen on PVA‐based electrospun membranes: Synthesis and characterization

García-Hernández

Morales-Sánchez

Calderón‐Domínguez

et al. 2021

J of Applied Polymer Sci

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Physicochemical, structural, and thermal properties of electrospun membranes depend on process conditions and the type and concentration of the raw materials used to produce them. In this work, the electrospinning technique (ES) is used to synthesize membranes with hydrolyzed collagen (HC) and polyvinyl alcohol (PVA) at two different distances. The characterization of these membranes is then carried out by X-Ray diffraction, Raman spectroscopy, differential scanning calorimetry, water vapor permeability (WVP), microscopy techniques, and porosity measurements. Results show that the morphology of the ES membranes depends mainly on the polymer/solvent system's physicochemical properties and the distance to the collector. Thicker samples (68-86 μm) are formed when using the furthest distance (10 cm), having fiber diameters smaller than 1 μm, porosity percentages up to 90%, and WVP values close to or in the recommended range for wound dressing commercial products. Moreover, the presence of HC results in samples with a less crystalline structure. To the best of our knowledge, this is the first report in which PVA and HC membranes are successfully synthesized by electrospinning and physicochemically characterized.

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Section: Introductionmentioning

confidence: 99%

Hydrolyzed collagen on PVA‐based electrospun membranes: Synthesis and characterization

García-Hernández

Morales-Sánchez

Calderón‐Domínguez

et al. 2021

J of Applied Polymer Sci

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“…The peak at δ = 7.23–7.25 ppm (E) is attributed to the four protons which are closer to the methyl groups of the PSf 15 . The peaks appear at δ = 5.27 ppm (F) and δ = 6.92 ppm (G) are associated with CH and CH 2 in the structure of PS 26 …”

Section: Resultsmentioning

confidence: 97%

“…Moreover, the peaks observed at δ = 31.07 ppm (G) and δ = 42.52 ppm (H) are characterized respectively by carbons of CH 3 and C(CH 3 ) 2 groups 15 . Additionally, peaks at δ = 117.78 ppm (I) and δ = 135.45 ppm (J) are attributed respectively to carbon of the CH 2 and CH of styrene 26 . On the other hand, 1 H NMR and 13 C NMR reveal that the incorporation of PS in PSf matrix might be responsible for new peaks located at the chemical shifts of δ = 5.27 and δ = 6.92 ppm corresponding to the PS CH and CH 2 .…”

Section: Resultsmentioning

confidence: 98%

“…Figure 3 shows that the 1 H NMR spectrum of the membrane exhibits several peaks whose chemical shifts in ppm are grouped as follows: a single sharp peak observed at δ = 1.69 ppm and CH of styrene. 26 On the other hand, 1 H NMR and 13 C NMR reveal that the incorporation of PS in PSf matrix might be responsible for new peaks located at the chemical shifts of δ = 5.27 and δ = 6.92 ppm corresponding to the PS CH and CH 2 . To conclude, NMR results confirm that there is indeed the structure of PSf and PS in the prepared membrane layer as a physical mixture.…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

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Low‐cost polysulfone/polystyrene ultrafiltration membrane with efficient azoic dyes removal and excellent antifouling performance for colored wastewater

Essate

Achiou

Benkhaya

et al. 2022

Polymers for Advanced Techs

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A new low-cost composite ultrafiltration membrane made of polysulfone (PSf) and polystyrene (PS) blend was effectively achieved on the ceramic pozzolan support using dip-coating method. The effect of PS content (5-20 wt%) on membrane properties such as microstructure and filtration performances was investigated. The Fourier-transform infrared spectroscopy, nuclear magnetic resonance, and differential scanning calorimetry analyses confirm that the two polymers lead to physical blend. The morphology analysis shows that PSf/PS membrane layer is homogeneous and strongly adherent on the pozzolan support. Furthermore, the developed membrane was applied for filtration of direct red (DR80) and methyl orange (MO) solutions at a pressure of 3 bar. It was proven that the PS addition significantly enhances the rejection of the membrane companying with a decrease of permeate flux to meet the trade-off selectivity-permeability. The optimized PSf/PS membrane containing 5 wt% of PS has a water permeability of 24 L h À1 m À2 bar À1 , and could reject 91% and 76%, respectively for DR80 and MO. Beside the promising filtration results, the developed membrane is also low-cost thanks to using pozzolan support, and it could be consequently scaled up for the treatment of colored wastewater generated from textile industries.

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“…Inorganic materials include zeolites, microporous amorphous inorganic materials, and other inorganic and hybrid materials. Mixed matrix materials mean dispersing nanoscale or microscale particles of the sieving materials into a continuous polymeric phase [21,30].…”

Section: Membrane Materials For the Removal Of Water Or Organics By V...mentioning

confidence: 99%

Process intensification by integration of distillation and vapor permeation or pervaporation - An academic and industrial perspective

Liu

Kruber

et al. 2022

Results in Engineering

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Optimization of the synthesis of ultrafiltration asymmetric membranes based on organic polymers

Cited by 17 publications

References 22 publications

Hydrolyzed collagen on PVA‐based electrospun membranes: Synthesis and characterization

Hydrolyzed collagen on PVA‐based electrospun membranes: Synthesis and characterization

Low‐cost polysulfone/polystyrene ultrafiltration membrane with efficient azoic dyes removal and excellent antifouling performance for colored wastewater

Process intensification by integration of distillation and vapor permeation or pervaporation - An academic and industrial perspective

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