A state-of-the-art protocol to minimize the internal concentration polarization in forward osmosis membranes

Arjmandi, Mehrzad; Peyravi, Majid; Altaee, Ali; Arjmandi, Abolfazl; Chenar, Mahdi Pourafshari; Jahanshahi, Mohsen; Binaeian, Ehsan

doi:10.1016/j.desal.2020.114355

Cited by 39 publications

(21 citation statements)

References 38 publications

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“…With the proportion of MOF‐199 increasing from 0 to 5%, more surface pores were located on the top surface of the composite membrane, with the pore size increasing from 75 nm (M3) to 125 nm (M5) (Figure 2b,b′,c,c′,d,d′). It had been demonstrated previously that the hydrophilic MOF, migrated toward the membrane surface during phase inversion, [ 34 ] and the water unstable MOF (Fe‐MOF, Al‐MOF, Cu‐MOF, etc.,) could be used as a pore former when porous matrix membranes (PMM) were fabricated. [ 2 ] Therefore, MOF‐199 nanomaterials, which possessed hydrophilic nature and water instability, acted as the pore former during the phase inversion, resulting in the porous membrane surface.…”

Section: Resultsmentioning

confidence: 99%

Alteration of the morphology of polyvinylidene fluoride membrane by incorporatingMOF‐199 nanomaterials for improving water permeation with antifouling and antibacterial property

Wang

et al. 2020

J Chinese Chemical Soc

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MOF-199@PVDF composite membranes are prepared by blending with different amounts of ultrasonic synthesized MOF-199 nanomaterials for improving the pure water flux (PWF) and achieving better antifouling and antibacterial performance. The membrane morphology, elemental composition, and surface properties are analyzed by various means of characterizations, including scanning electron microscopy, energy-dispersive X-ray spectroscopy, and water contact angle measurements. The performance of the modified membranes is also determined from the perspective of the PWF, bovine serum albumin rejection, as well as antifouling and antibacterial properties. Due to the variation in the viscosity of dope solution, the composite membranes possess remarkably different morphology, and the M5 membrane, which exhibited a sponge-like structure, the largest surface pore size, and the highest porosity, shows the highest PWF, reaching up to 185.05 L/m 2 h. Moreover, with the incorporation of MOF-199 nanocrystals, the antifouling property, together with the antibacterial property, toward both gram-negative bacteria and gram-positive bacteria, based on M5 and M7 membranes, increases dramatically compared with the pristine polyvinylidene fluoride membrane. In addition, the long-term permeation performance and copper leakage of the membrane are investigated. As a result, the composite membrane, M5, shows great potential in real water treatment.

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Section: Resultsmentioning

confidence: 99%

Alteration of the morphology of polyvinylidene fluoride membrane by incorporatingMOF‐199 nanomaterials for improving water permeation with antifouling and antibacterial property

Wang

et al. 2020

J Chinese Chemical Soc

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“…11 Generally, the essential reason for ICP should be attributed to the lowmass transfer efficiency between the solution inside and outside the substrate. 25 High porosity, large pore channels, and good hydrophilicity can improve the mass transfer efficiency. 26 Hence, the introduction of CC could improve the transfer efficiency and alleviate ICP.…”

Section: Resultsmentioning

confidence: 99%

“…ICP, which cannot be completely eliminated, is the most adverse feature in the FO process 11 . Generally, the essential reason for ICP should be attributed to the low‐mass transfer efficiency between the solution inside and outside the substrate 25 . High porosity, large pore channels, and good hydrophilicity can improve the mass transfer efficiency 26 .…”

Section: Resultsmentioning

confidence: 99%

Thin‐film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination

Zheng

Zhou

Cheng

et al. 2020

J of Applied Polymer Sci

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Synthesized by the reaction between α-cellulose and m-tolyl isocyanate (MTI), cellulose carbamate (CC) was blended with polyvinyl chloride (PVC) to fabricate substrates for thin-film composite (TFC) forward osmosis (FO) membranes. The introduction of CC into substrates improved both membrane structure and performance. The substrates exhibited higher porosity and hydrophilicity, and better connective pore structure; while rejection layer exhibited better morphology but limited cross-linked degree decrease after the introduction of CC. According to the results, the CC blend ratio of 10% was the optimal ratio. With this blend ratio, the TFC-10 membrane presented favorable water permeability (1.86 LMH/bar) and structure parameter (337 μm), which resulted in excellent FO performance (water flux with a value of 40.40 LMH and specific salt flux with a value of 0.099 g/L under rejection layer faces draw solution [DS] mode when 1 M NaCl and deionized water were utilized as DS and feed solution). In addition, the TFC-10 membrane showed good water flux and low-sulfate ion leakage in the potential application of brackish water desalination.

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“…After extensive investigation on structural and transport parameters of all fabricated TFC membranes, it is very important to use the characteristic curve for selecting the best membranes . This curve presents a trade‐off between the ratio of J w on theoretical osmotic pressure ( J w /Δ π theo ) and J w / J s (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…Lately, they explained the concept of unique membranes, named porous matrix membranes (PMMs) based on water‐unstable MOF crystals as a green template. The fabrication process of PMMs is similar to the conventional MMMs fabrication procedure, with a difference that after the casting of the membrane, the polymer film was then placed into the water bath followed by soaking in continuous flow water to remove MOF particles from the membrane matrix. Compared to common MMMs, the PMMs can significantly enhance the pure water permeability and this might be attributed to the changes in the physical structure of the membrane, as shown in Figure S1 .…”

Section: Introductionmentioning

confidence: 99%

Physical modification of polymeric support layer for thin film composite forward osmosis membranes by metal–organic framework‐based porous matrix membrane strategy

Arjmandi

Chenar

Peyravi

et al. 2019

J of Applied Polymer Sci

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Physical modification of support layers (SLs) for thin-film composite (TFC) forward osmosis (FO) membranes is the main goal of this study. Accordingly, the strategy of metal-organic framework (MOF)-based porous matrix membrane (PMM) was used for the fabrication of controllable SLs. Fourteen different TFC FO membranes were successfully fabricated by interfacial polymerization (IP) technique over the fourteen different SLs made of polyetherimide (PEI), polyethersulfone (PES), and twelve MOF-based PMM. The controllable MOF particles, fabricated SLs, and TFC membranes were characterized by Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), dynamic light scattering (DLS), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), contact angle (CA), inductively coupled plasma (ICP), and developed SHN1 method. The results showed that the PMM strategy can lead to an increase in the degree of crosslinking of polyamide (PA) as a result of physical modification of the original SLs. Also, the PMM strategy reduced the structural parameters and hence the internal concentration polarization (ICP) was controlled. However, according to the characteristic curve, physical modification of the structure of PES and PEI by MOF-based PMM strategy caused a small and dramatic effect (respectively) on the performance of the TFC FO membranes. the effective driving force (EDF) across the semipermeable membrane, causing reduced membrane performance. The intensity of DICP can be determined using structural parameter (S), which is mainly depended on the physicochemical properties of the SL. To reduce S value (or reduce DICP) in FO membranes, SL should be fabricated with high porosity (ε), low tortuosity (τ), and thin Additional Supporting Information may be found in the online version of this article.

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A state-of-the-art protocol to minimize the internal concentration polarization in forward osmosis membranes

Cited by 39 publications

References 38 publications

Alteration of the morphology of polyvinylidene fluoride membrane by incorporatingMOF‐199 nanomaterials for improving water permeation with antifouling and antibacterial property

Alteration of the morphology of polyvinylidene fluoride membrane by incorporatingMOF‐199 nanomaterials for improving water permeation with antifouling and antibacterial property

Thin‐film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination

Physical modification of polymeric support layer for thin film composite forward osmosis membranes by metal–organic framework‐based porous matrix membrane strategy

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