Surface modification of commercial reverse osmosis membranes using both hydrophilic polymer and graphene oxide to improve desalination efficiency

Majid, Haddadi; Heidarzadeh, Nima; Vatanpour, Vahid; Dehqan, Ahmad

doi:10.1016/j.chemosphere.2022.134931

Cited by 26 publications

(5 citation statements)

References 68 publications

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“…The major, high weight loss (13%) was observed at 252°C, followed by 20% at 625°C, was fully in conformity with published data, and showed the same % DTG 27. Fourier‐transform infrared spectroscopy (FTIR) spectroscopy was a tool to recognize functional groups of GO nanostructure used in the prepared complex structure, as illustrated in Figure 3, and showed conformity with distinguished peaks at 3400, 1800, and 1040 cm −1 19 …”

Section: Resultsmentioning

confidence: 99%

“…Fourier-transform infrared spectroscopy (FTIR) spectroscopy was a tool to recognize functional groups of GO nanostructure used in the prepared complex structure, as illustrated in Figure 3, and showed F I G U R E 1 XRD-plot for obtained GO nanoparticles conformity with distinguished peaks at 3400, 1800, and 1040 cm À1 . 19…”

Section: Characterization Of Membranesmentioning

confidence: 99%

“…16 This blended polymeric substrate will be studied in this work to show the effect of using porous polyacrylonitrile (PAN) with polysulfone (PSF) as the main polymeric substrate. Surface modification through chemical grafting 19 and layer-by-layer deposition 20 or introducing selective nanostructure were discussed for their membrane-enhanced performance and characterizations. The effect of their combination is not correlated, and this is highlighted in this work.…”

Section: Introductionmentioning

confidence: 99%

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Effect graphene oxide nanostructure/tannic acid on mixed polymeric substrate‐surface modified RO membranes

Shalaby

Abdallah

Wilken

et al. 2022

J of Applied Polymer Sci

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In this work, polyamide (PA) layer of (TFC) thin-film composite in reverse osmosis (RO) membranes are compared to facile cost-effective lower rejection RO-blend membranes using graphene oxide. Polyvinyl alcohol (PVA) is crosslinked with glutaraldehyde hydrogel and thereby showing the effect of a fixed concentration of graphene oxide (GO) at different surface modification stages. Surface grafting using methacrylic acid is performed to govern the role of the protective layer on the efficiency of the covered TFC layer as membranes performance regarding salt rejection and permeability. GO concentration of 0.25 wt% in PVA solution shows a maximum % rejection reaching 70 for 3PG and the highest permeate flux for 1PG is 45.52 LMH. While the TFC membranes T and TG have shown higher rejection percentages to reach 88.31% for 3TG of and the highest permeate flux is 30.7 LMH for 1TG and decreases to reach 24.56 LMH for 3TG. Different membrane characterizations are fulfilled through surface morphology, wettability, BET area, and adsorptive fouling.Optimized ratios for tannic acid, ZnO-nanostructure, and graphene oxide with the mixed polymeric substrate are reached. The effect of graphene oxide in the surface grafting layer over blend and TFC membranes are presented.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect graphene oxide nanostructure/tannic acid on mixed polymeric substrate‐surface modified RO membranes

Shalaby

Abdallah

Wilken

et al. 2022

J of Applied Polymer Sci

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“…The filtration performance of all membranes was assessed by the filtration of the BSA protein and dye solutions (250 and 100 mg/L, respectively). The removal efficiency ( R ) was calculated by Equation () 44

R (%) = (1 - \frac{C_{P}}{C_{f}}) \times 100 .

…”

Section: Methodsmentioning

confidence: 99%

Study of antifouling and decolorization effect in polyethersulfone membranes improved with dendrimer‐modified metal–organic frameworks

Khosravi

Hosseini

Vatanpour

et al. 2023

J of Applied Polymer Sci

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The Mil‐125(Ti) metal–organic framework nanoparticles were modified with different compounds i.e. polyamidoamine dendrimer (Mil‐Den), chitosan (Mil‐CS) and Mil‐CS‐Den to prepare functional and hydrophilic nanocomposites. These nanocomposites were characterized and applied for modification of polyethersulfone (PES) membrane by blending them in the dope solutions. The mixed matrix PES membranes were manufactured by the nonsolvent‐induced phase inversion method. The introduction of the nanocomposites into the membrane structure led to positive alterations such as the improvement of hydrophilicity and morphology causing the development of permeability and antifouling properties. The bare PES membrane contact angle was decreased from 60° to 34.5° by adding 0.5 wt% of Mil‐CS‐Den nanocomposite. Applications of novel structures with special absorption in 0.5 wt% of Mil‐CS‐Den membrane, caused an increment of porosity, mean pore size and reduction of surface roughness. The permeability was enhanced from 4.2 to 21.43 L/m2 h bar, while fouling was reduced from 48.5% to 13.5% which indicates the strengthening of the antifouling feature of the hydrophobic PES membrane. Also, the flux recovery ratio was enhanced from 66.7% to 89.3% by blending 0.5 wt% of Mil‐CS‐Den. The modified membranes showed an excellent dye separation performance. The attachment of dendrimer and chitosan to the Mil‐125(Ti) surface increased the efficiency of Mil‐125(Ti) in the modification of the PES membrane. The utilization of nanomaterial features can reduce the limitation of membrane processes and reach desirable outcomes. The results of this work indicate the high potential of the modified MOF for the removal of dye contaminants as well as provide a suitable perspective for water purification with the help of membrane processes.

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“…The hydrophilicity of the separation membrane has a direct impact on its final water flux, which is also the main reason why scholars have been committed to improving the hydrophilicity of the membrane. [41][42][43] In addition, for the porous hollow fiber membrane used as the substrate for the composite membrane, a hydrophilic membrane surface would be more conducive to the adsorption and distribution of aqueous monomers on it. 44 Membrane surface hydrophilicity was determined by measurements of the WCA, and variations of the WCAs of different PSF hollow fiber membranes with contact time are shown in Figure 8(a).…”

Section: Surface Hydrophilicity Of Different Psf Hollow Fiber Membranesmentioning

confidence: 99%

Enhanced water permeability of hollow fiber composite reverse osmosis membrane using porous α-cellulose/polysulfone hollow fiber membrane as the substrate

Li,

Fan,

et al. 2023

Textile Research Journal

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The hollow fiber composite (HFC) reverse osmosis (RO) membrane with a special self-supporting structure has attracted a great deal of attention in the fields of separation and purification. However, low permeability is an urgent problem restricting its wide application. A porous polysulfone (PSF) hollow fiber support membrane was fabricated through the dry–wet spinning technique and hydrophilic α-cellulose © powder was incorporated in the PSF membrane matrix to improve the membrane’s water permeability. The HFC RO membrane was prepared via the interfacial polymerization process on the inner surface of the C/PSF support membrane. The membrane morphology and surface hydrophilicity were evaluated through scanning electron microscopy observation and dynamic water contact angle (WCA) measurement. The effects of α-cellulose incorporation on the separation performance of PSF hollow fiber membranes and HFC RO membranes were investigated. The results showed that the surface hydrophilicity and water permeability of the PSF membrane were significantly improved after the introduction of α-cellulose. The WCA of the modified PSF support membrane decreased from 84.6° for the neat PSF membrane to 70.25°, and the pure water flux can reach a maximum value of 102.1 L/(m2 · h) (0.1 Mpa), which was 1.3 times that of the pristine membrane. The HFC RO membrane using the hydrophilic modified PSF membrane as the substrate exhibited an enhanced water flux of 15.6 L/(m2 · h) and, meanwhile, the membrane salt rejection remained above 97.6% (1.0 wt% NaCl aqueous solution, 0.7 Mpa). The HFC RO membrane showed extremely high rejection rates (99%) for different dyes (congo red and methylene blue). No obvious performance deterioration was observed for the HFC RO membrane during continuous vacuum membrane distillation (VMD) experiments for 60 h.

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Surface modification of commercial reverse osmosis membranes using both hydrophilic polymer and graphene oxide to improve desalination efficiency

Cited by 26 publications

References 68 publications

Effect graphene oxide nanostructure/tannic acid on mixed polymeric substrate‐surface modified RO membranes

Effect graphene oxide nanostructure/tannic acid on mixed polymeric substrate‐surface modified RO membranes

Study of antifouling and decolorization effect in polyethersulfone membranes improved with dendrimer‐modified metal–organic frameworks

Enhanced water permeability of hollow fiber composite reverse osmosis membrane using porous α-cellulose/polysulfone hollow fiber membrane as the substrate

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