A novel antifouling ultrafiltration membranes prepared from percarboxylic acid functionalized SiO₂ bound Fe₃O₄ nanoparticle (SCMNP‐COOOH)/polyethersulfone nanocomposite for BSA separation and dye removal

Abstract

BACKGROUND Silica coated magnetite nanoparticles (SCMNPs) were synthesized via a co‐precipitating method and functionalized with carboxylic acid and percarboxylic acid groups for the preparation of microporous polyethersulfone (PES) nanocomposite membranes and used in bovine serum albumin (BSA) and dye separation. There is no published report about the use of this nanoparticle in the preparation of mixed matrix membranes. RESULTS Different concentrations of these nanoparticles were used. The 0.5 wt% SCMNPs‐COOOH NPs–PES membrane had the lowest irreversible fouling resistance (Rir) value (8.33%) and the highest FRR value (91.7%), suggesting that the prepared mixed matrix membrane is easily recovered by water washing. The introduction of percarboxylic acid groups has a positive impact on rejection of the three dyes (Rhodamine B, Direct Black 38, Reactive Green 19), and all membranes presented rejections of more than 90% due to improved electrostatic repulsion between the dye and the membrane surface by incorporation of the nanoparticles. CONCLUSION The membranes modified by SCMNPs‐COOOH had significantly higher permeability and BSA solution flux compared with the bare PES membrane. The nanocomposite membranes had enhanced hydrophilicity because of water affinity enhancement of the membrane surface due to the presence of hydrophilic nanoparticles. It is concluded that SCMNPs‐COOOH nanoparticles could be an ideal additive to modify PES membrane for water filtration applications. © 2018 Society of Chemical Industry

Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I

“…Aliouche et al found that color removal caused by azo dyes followed an increasing order: UV < acetone/UV < S 2 O 8 2− /heat < S 2 O 8 2− /H 2 O 2 /UV < S 2 O 8 2− /UV < H 2 O 2 /UV [ 9 ]. Various nanomaterials used as the absorbents contain cobalt-zinc ferrite nanoadsorbents [ 19 ], silica nano-composite [ 16 , 20 , 21 , 22 ], nano zero-valent iron [ 23 ], Fe 3 O 4 nano-composite [ 24 , 25 , 26 , 27 ], carbon nanomaterials [ 28 , 29 , 30 , 31 , 32 , 33 ] and clay [ 34 , 35 ].…”

Functionalization of silica nanoparticles to reduce membrane swelling in CO2 absorption process

“…Comparing Fig. (a) and (b), whereas the typical Si‐O‐Si peak around 1072 cm −1 for silica was apparent, the latter exhibited peaks at 2850 cm −1 and 2915 cm −1 , indicating the symmetric and asymmetric stretching vibration of –CH 2 from the LDPE . This was proof for the success coating of LDPE onto silica nanoparticles, serving as evidence in addition to the TEM images (Fig.…”

Binary metal oxides incorporated polyethersulfone ultrafiltration mixed matrix membranes for the pretreatment of seawater desalination

“…SPEEK resulted in thermodynamic instability during phase inversion process by enhancing the viscosity and water‐soluble properties. Therefore, it provided a segmental gap between the polymer matrix in both PES/SPEEK membrane, PES/SPEEK/TiZr, and PES/SPEEK/TiZn MMMs 36 . Additionally, the increase in the loading of TiZr from 0.25 to 0.5 wt% enhanced the surface roughness.…”

“…Therefore, it provided a segmental gap between the polymer matrix in both PES/SPEEK membrane, PES/SPEEK/ TiZr, and PES/SPEEK/TiZn MMMs. 36 Additionally, the increase in the loading of TiZr from 0.25 to 0.5 wt% enhanced the surface roughness. This observation suggested that the nanoparticles were mainly distributed on the membrane surface.…”