Surface modification of polyethersulfone membranes with goethite through self-assembly

Sandoval-Olvera, Ivette G.; Villafaña-López, Liliana; Reyes-Aguilera, J. Antonio; Ávila-Rodríguez, Mario; Razo-Lazcano, Teresa Alejandra; González-Muñoz, M. Pilar

doi:10.5004/dwt.2017.20302

Cited by 9 publications

(5 citation statements)

References 31 publications

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“…Figure a shows the FTIR spectrum of the PES support layer, and the stretching vibrations of the SO group at 1320 cm –1 and the C–O group at 1237 cm –1 corresponded to the presence of sulfone and ether groups in the PES support. The CC stretching at 1577 cm –1 and C–H bending present at 700–900 cm –1 correspond to the 1,4-disubstituted benzene ring . The FTIR spectra of bare TFC and SFAC-TFN membranes are depicted in Figure b.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The C�C stretching at 1577 cm −1 and C−H bending present at 700−900 cm −1 correspond to the 1,4-disubstituted benzene ring. 39 The FTIR spectra of bare TFC and SFAC-TFN membranes are depicted in Figure 2b. The C�O stretching vibration peak of amide at 1628 cm −1 , as well as the broader peak at 3450 cm −1 in bare TFC membrane corresponding to the overlap of the unreacted amine (N−H) groups and hydroxyl group stretching vibrations, can confirm the formation of the PA layer.…”

Section: Membrane Structural Characteristicsmentioning

confidence: 99%

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Designing Super Fine Activated Carbon-Functionalized Thin-Film Nanocomposite Membranes for Adsorptive Removal of Per- and Poly-Fluoroalkyl Substances

Kasula,

Pala,

Esfahani

2024

ACS Appl. Eng. Mater.

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The ubiquity of per-and poly-fluoroalkyl substances (PFASs) in production and usage, coupled with their enduring presence and mobility within the environment, has underscored significant human exposure. Membrane filtration and adsorption processes stand as principal and effective means for PFAS elimination from water, each contributing to distinct separation attributes. While thin-film composite (TFC) nanofiltration (NF) membranes achieve satisfactory PFAS removal (<90%), rejected PFAS in the concentrated stream necessitates supplementary separation measures. This study presents the development of adsorptive thin-film nanocomposite (TFN) NF membranes, functionalized with submicron (∼500 nm) activated carbon (SFAC), to enhance perfluorooctanesulfonic acid (PFOS) removal via adsorption during water filtration. The NF membrane was fabricated on a poly(ether sulfone) support layer with a polyamide (PA) selective layer functionalized by immobilization of SFAC inside the PA via interfacial polymerization (IP). The effect of SFAC on the piperazine and trimesoyl chloride transport during the IP process and consequently on the PA attributes encompassing morphology and chemistry, and performance (permeability and rejection) was investigated. The resulting SFAC-TFN membranes with optimal loading showcased a remarkable PFOS removal efficiency of 94%, where over 80% was attributed to adsorption. Furthermore, these membranes exhibited heightened permeability while maintaining marginal salt rejection reduction in comparison to bare TFC membranes. Remarkably, SFAC-TFN membranes exhibited sustained PFOS removal even after four regeneration cycles, employing a 50% ethanol/water solution for regeneration. The findings offer insights into the synergy of adsorption and separation mechanisms, indicating promising avenues for advanced PFAS treatment strategies.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Membrane Structural Characteristicsmentioning

confidence: 99%

Designing Super Fine Activated Carbon-Functionalized Thin-Film Nanocomposite Membranes for Adsorptive Removal of Per- and Poly-Fluoroalkyl Substances

Kasula,

Pala,

Esfahani

2024

ACS Appl. Eng. Mater.

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“…Figure a shows the FT-IR spectra of the membranes. For the raw PES, peaks corresponding to SO (1151 cm –1 ), C–H (1106 cm –1 ), and C–O (820–710 cm –1 ) were observed. − The small number of cation exchange ionomers in c-PES could make it difficult to confirm their presence. Hence, an overimpregnated c-PES (c-PES-O) was prepared and characterized (Figure S2a).…”

Section: Resultsmentioning

confidence: 99%

Lithium-Ion Exchange Membrane Water Electrolysis Using a Cationic Polymer-Modified Polyethersulfone Membrane

Lee¹,

Park

et al. 2023

ACS Sustainable Chem. Eng.

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We previously reported lithium-ion exchange membrane water electrolysis using a commercial Nafion membrane for clean hydrogen production. In this study, a polyethersulfone (PES) membrane with high alkaline stability was dipped in a cationic aqueous solution to fabricate a PES-based membrane (c-PES membrane) as an alternative to Nafion. Compared with the commercial PES membrane, for the c-PES membrane, lithium ions can selectively transport from the anode to the cathode. Additionally, a high-porosity Ni-based porous transport layer (PTL) was used as an alternative to expensive Ti-PTL. Lithium-ion exchange membrane water electrolysis at 50 °C using c-PES membrane exhibited improved cell performance (1.13 A cm–2 @ 1.7 V) owing to lower ohmic and charge-transfer resistance, exhibiting the comparable performance to the reported water electrolysis systems. The carbonate formed during the process was effectively removed by injecting deionized water followed by H2SO4 solution, resulting in stable cell performance for 200 h.

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“…MP0 indicates the pristine PES membrane. All membranes had usual peaks of PES, such as the 1585 cm −1 benzene ring stretching, the 1495 cm −1 C=C bond, the 1247 cm −1 and 1170 cm −1 aromatic sulfone group [ 52 , 53 ]. In the spectra the broad peak at 3450 cm −1 indicates the presences of hydroxyl group that is due to the presences of PVP used as pore former during the fabrication of PES membrane.…”

Section: Resultsmentioning

confidence: 99%

Water Treatment Using High Performance Antifouling Ultrafiltration Polyether Sulfone Membranes Incorporated with Activated Carbon

et al. 2022

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Membrane fouling is a continued critical challenge for ultrafiltration membranes performance. In this work, polyether sulfone (PES) ultrafiltration (UF) membranes were fabricated via phase-inversion method by incorporating varying concentrations of APTMS modified activated carbon (mAC). The mAC was thoroughly characterized and the fabricated membranes were studied for their surface morphology, functional groups, contact angle, water retention, swelling (%) porosity, and water flux. The hydrophilicity of mAC membranes also resulted in lower contact angle and higher values of porosity, roughness, water retention as well as water flux. Also, the membranes incorporated with mAC exhibited antibacterial performance against model test strains of gram-negative Ecoil and gram-positive S. aureus. The antifouling studies based on bovine serum albumin protein (BSA) solution filtration showed that mAC membranes have better BSA flux. The higher flux and antifouling characteristics of the mAC membranes were attributed to the electrostatic repulsion of the BSA protein from the unique functional properties of AC and network structure of APTMS. The novel mAC ultrafiltration membranes developed and studied in present work can provide higher flux and less BSA rejection thus can find antifouling applications for the isolation and concentration of proteins and macromolecules.

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Surface modification of polyethersulfone membranes with goethite through self-assembly

Cited by 9 publications

References 31 publications

Designing Super Fine Activated Carbon-Functionalized Thin-Film Nanocomposite Membranes for Adsorptive Removal of Per- and Poly-Fluoroalkyl Substances

Designing Super Fine Activated Carbon-Functionalized Thin-Film Nanocomposite Membranes for Adsorptive Removal of Per- and Poly-Fluoroalkyl Substances

Lithium-Ion Exchange Membrane Water Electrolysis Using a Cationic Polymer-Modified Polyethersulfone Membrane

Water Treatment Using High Performance Antifouling Ultrafiltration Polyether Sulfone Membranes Incorporated with Activated Carbon

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