Fabrication of polycarbonate ultrafiltration mixed matrix membranes including modified halloysite nanotubes and graphene oxide nanosheets for olive oil/water emulsion separation

Amid, Maryam; Nabian, Nima; Delavar, Maedeh

doi:10.1016/j.seppur.2020.117332

Cited by 50 publications

(25 citation statements)

References 63 publications

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“…Even if O-MMT could improve membrane hydrophilicity and porosity, when O-MMT acts as a barrier, this compensates the improvement in pure water flux, leading to no change in pure water flux [ 49 ]. Moreover, a high concentration of particle could also lead to aggregation of the nanoclays, leading to nonuniform distribution of the O-MMT in the membrane structure [ 52 ]. However, a different concentration of the O-MMT did not affect the oil separation using diesel (>98%).…”

Section: Resultsmentioning

confidence: 99%

Modifying Cellulose Acetate Mixed-Matrix Membranes for Improved Oil–Water Separation: Comparison between Sodium and Organo-Montmorillonite as Particle Additives

et al. 2021

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In this study, cellulose acetate (CA) mixed-matrix membranes were fabricated through the wet-phase inversion method. Two types of montmorillonite (MMT) nanoclay were embedded separately: sodium montmorillonite (Na-MMT) and organo-montmorillonite (O-MMT). Na-MMT was converted to O-MMT through ion exchange reaction using cationic surfactant (dialkyldimethyl ammonium chloride, DDAC). Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) compared the chemical structure and composition of the membranes. Embedding either Na-MMT and O-MMT did not change the crystallinity of the CA membrane, indicating that the nanoclays were dispersed in the CA matrix. Furthermore, nanoclays improved the membrane hydrophilicity. Compared with CANa-MMT membrane, CAO-MMT membrane had a higher separation efficiency and antifouling property. At the optimum concentration of O-MMT in the CA matrix, the pure water flux reaches up to 524.63 ± 48.96 L∙m−2∙h−1∙bar−1 with over 95% rejection for different oil-in-water emulsion (diesel, hexane, dodecane, and food-oil). Furthermore, the modified membrane delivered an excellent antifouling property.

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Section: Resultsmentioning

confidence: 99%

Modifying Cellulose Acetate Mixed-Matrix Membranes for Improved Oil–Water Separation: Comparison between Sodium and Organo-Montmorillonite as Particle Additives

et al. 2021

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“…One wt% GO filled polyether sulfone flat sheet membrane produced by Junaidi et al, shows rejection rate of oil around 50% and water flux of 95.12 ± 8.51 Lm −2 h −1 at pressure 1 bar [ 40 ]. Meanwhile in another study by Amid et al, 0.25 wt% GO filled polycarbonate flat sheet membrane shows 99% rejection rate of oil with water flux of 85.85 Lm −2 h −1 at operating pressure of 2 bar [ 52 ]. Isotactic propylene-polydopamine-GO membrane shows an oil rejection rate of more than 99% but the corresponding water flux is only recorded at 188 Lm −2 h −1 at an operating pressure of 0.1 MPa [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

et al. 2021

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Latex phase blending and crosslinking method was used in this research work to produce nitrile butadiene rubber-graphene oxide (NBR-GO) membranes. This fabrication technique is new and yields environmentally friendly membranes for oil-water separation. GO loading was varied from 0.5 to 2.0 part per hundred-part rubber (pphr) to study its effect on the performance of NBR-GO membrane. GO was found to alter the surface morphology of the NBR matrix by introducing creases and fold on its surface, which then increases the permeation flux and rejection rate efficiency of the membrane. X-Ray diffraction analysis proves that GO was well dispersed in the membrane due to the non-existence of GO fingerprint diffraction peak at 2θ value of 10–12° in the membrane samples. The membrane filled with 2.0 pphr GO has the capability to permeate 7688.54 Lm−2 h−1 water at operating pressure of 0.3 bar with the corresponding rejection rate of oil recorded at 94.89%. As the GO loading increases from 0.5 to 2.0 pphr, fouling on the membrane surface also increases from Rt value of 45.03% to 87.96%. However, 100% recovery on membrane performance could be achieved by chemical backwashing.

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“…The PWF was evaluated by ultrafiltration of pure water (type 2, 0.066 µS/cm, Millipore, 20 • C) at the transmembrane pressures (TMPs) 1, 2, and 3 bar. Antifouling properties of the membranes were determined on a basis of 2 h of ultrafiltration of BSA solution (1 g/dm 3 ). The feed cross-flow velocity and TMP during the fouling experiments were 1 m/s and 2 bar, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Separation properties of the membranes were evaluated during the ultrafiltration of a series of model solutions containing poly(ethylene glycols) (PEGs) with molecular weights of 4, 20, and 35 kDa, and dextrans with molecular weights of 70, 110, 200, and 500 kDa. The concentration of the model organic compounds was 0.5 g/dm 3 , and the TMP was set at 1 bar. The rejection of PEGs and dextrans was calculated based on Equation ( 3…”

Section: Methodsmentioning

confidence: 99%

“…One of the most promising is the modification of membranes with nanoparticles (NPs), such as TiO 2 , SiO 2 , Al 2 O 3 , halloysite nanotubes (HNTs), carbon nanotubes (CNTs), titanate nanotubes (TNTs), and others [ 1 ]. Among them, HNTs have attracted significant attention as a natural, cheap, and non-toxic material [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The application of these NPs was reported as an efficient approach to increase membranes’ permeability, as well as mechanical and thermal resistance [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Polymer Solvents on the Properties of Halloysite-Modified Polyethersulfone Membranes Prepared by Wet Phase Inversion

et al. 2021

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Ultrafiltration polyethersulfone (PES) membranes were prepared by wet phase inversion. Commercial halloysite nanotubes (HNTs) in the quantities of 0.5 wt% vs. PES (15 wt%) were introduced into the casting solution containing the polymer and different solvents: N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA), or 1-methyl-2-pyrrolidinone (NMP). The type of solvent influenced the membranes’ morphology and topography, as well as permeability, separation characteristics, and antifouling and antibacterial properties. The membranes prepared using DMA exhibited the loosest cross-section structure with the thinnest skin and the roughest surface, while the densest and smoothest were the DMF-based membranes. The advanced contact angles were visibly lower in the case of the membranes prepared using DMF compared to the other solvents. The highest water permeability was observed for the DMA-based membranes, however, the most significant effect of the modification with HNTs was found for the NMP-based series. Regardless of the solvent, the introduction of HNTs resulted in an improvement of the separation properties of membranes. A noticeable enhancement of antifouling performance upon application of HNTs was found only in the case of DMF-based membranes. The study of the antibacterial properties showed that the increase in surface roughness had a positive effect on the inhibition of E. coli growth.

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Fabrication of polycarbonate ultrafiltration mixed matrix membranes including modified halloysite nanotubes and graphene oxide nanosheets for olive oil/water emulsion separation

Cited by 50 publications

References 63 publications

Modifying Cellulose Acetate Mixed-Matrix Membranes for Improved Oil–Water Separation: Comparison between Sodium and Organo-Montmorillonite as Particle Additives

Modifying Cellulose Acetate Mixed-Matrix Membranes for Improved Oil–Water Separation: Comparison between Sodium and Organo-Montmorillonite as Particle Additives

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

Influence of Polymer Solvents on the Properties of Halloysite-Modified Polyethersulfone Membranes Prepared by Wet Phase Inversion

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