Novel polyaniline–polyethersulfone nanofiltration membranes: effect of <i>in situ</i> polymerization time on structure and desalination performance

Butt, Ayyaz Shahbaz; Qaiser, Asif Ali; Abid, Nida; Mahmood, Umer

doi:10.1039/d2ra05735b

Cited by 5 publications

(6 citation statements)

References 82 publications

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“…With addition of 0.5 wt% of PANI in the matrix increased the thermal stability, however there was instantaneous weight loss in the final stage as compared to the pristine PS membrane, this can be attributed to the degradation of the PS and PANI chains in the membrane matrix. This agrees with experiment which was done by Butt et al, PANI increased the thermal stability of polyethersulfone membrane 37,38 …”

Section: Resultssupporting

confidence: 92%

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Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Sichali,

Noby,

Naragino

et al. 2023

J of Applied Polymer Sci

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This work describes the polyaniline (PANI) nanoparticles' impregnation into the polystyrene (PS) membrane and its impact on the different membrane properties for the first time. PANI nanoparticles were synthesized separately using the oxidative polymerization technique and then impregnated into the polystyrene‐DMF matrix solution. Membranes were cast via the Non‐Solvent Induced Phase Separation (NIPS) process. The surface and structural properties of the fabricated membranes were thoroughly characterized using contact angle measurement (CA), x‐ray diffraction (XRD), Fourier‐transform infrared spectrometer (FTIR), and scanning electron microscopy (SEM). Thermal gravimetric analysis (TGA) and the mechanical characteristics of the membrane were also investigated. According to the CA results, the addition of PANI in the matrix improved the polystyrene membrane's hydrophilicity from 65° to 54.5°. The FTIR spectra revealed that the PANI nanoparticles were successfully impregnated into the PS matrix. SEM images illustrated that the porosity of the PANI‐modified membrane was enhanced by 50% compared to the pristine PS membrane. Furthermore, adding PANI to the PS membrane significantly reduced the average pore size. The filtration experiment showed that PANI modified membrane had 81% rejection of MO dye as compared to the pristine PS membrane which had 60%. Therefore, The PANI added to the PS membrane greatly enhanced the PS membrane's structural properties.

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Section: Resultssupporting

confidence: 92%

“…This agrees with experiment which was done by Butt et al, PANI increased the thermal stability of polyethersulfone membrane. 37,38…”

Section: Ca Measurementsmentioning

confidence: 99%

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Sichali,

Noby,

Naragino

et al. 2023

J of Applied Polymer Sci

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“…As shown in Figure a, the weight of the original PES membrane decreased by 4% after 30 min of ultrasonic oscillation, indicating that PES has good mechanical stability, while the weight of the PANI@PES composite membrane decreased by about 10% and that of Ag 2 S/PANI@PES decreased by only about 5%. During the synthesis of PANI, the oxidant ammonium persulfate used in the polymerization reaction may cause some damage to the PES membrane and lead to a 10% weight loss of the PANI@PES composite membrane due to the possible detachment of PANI protrusions. , However, Ag 2 S grown by continuous layer adsorption method inversely increased the overall mechanical stability due to the tight chelation of Ag + with N in PANI …”

Section: Resultsmentioning

confidence: 99%

“…During the synthesis of PANI, the oxidant ammonium persulfate used in the polymerization reaction may cause some damage to the PES membrane and lead to a 10% weight loss of the PANI@PES composite membrane due to the possible detachment of PANI protrusions. 43,44 However, Ag 2 S grown by continuous layer adsorption method inversely increased the overall mechanical stability due to the tight chelation of Ag + with N in PANI. 45 In terms of chemical stability, the Ag 2 S/PANI@PES composite membranes were immersed in HCl and sodium hydroxide solutions with different pH values (0, 1, 3, 7, 10, 12, 14) for 24 h and then their WCA was tested.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of the Ag₂S/PANI@PES Composite Membrane and Its Antipollution Properties

Li,

Chen,

et al. 2024

Langmuir

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Membrane separation technology offers a sustainable and efficient solution to wastewater management; however, membrane fouling significantly impedes its application. Photocatalytic membranes, integrating photocatalytic and membrane separation technologies, enhance membrane separation efficacy while effectively mitigating organic and biological contaminations. In this work, Ag 2 S/PANI@PES composite membranes were prepared via a facile in situ polymerization and successive layer adsorption technique. The modified poly(ether sulfone) (PES) membrane demonstrated improved hydrophilicity and separation performance, and its heterostructure between polyaniline (PANI), Ag 0 , and Ag 2 S effectively addressed organic fouling issues. Moreover, Ag 2 S/PANI@PES exhibited outstanding antimicrobial properties, as well as chemical and mechanical stability.

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“…48 Further degradation beyond this temperature is related to the further degradation of the PES polymer backbone. 49 The slight reduction in the T d in the case of the integrated membranes may be related to the higher accumulation of solvent molecules in the patterns, which can alter the overall PES polymer chain strength. Nevertheless, the integrated membranes exhibit thermal stability, rendering them suitable for actual and reliable operations.…”

Section: Thermal and Mechanical Stabilitiesmentioning

confidence: 99%

Integration of Porous and Permeable Poly(ether sulfone) Feed Spacer onto Membrane Surfaces via Direct 3D Printing

Ibrahim,

Hilal

2024

ACS Appl. Eng. Mater.

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This research details the use of direct three-dimensional (3D) printing technology to create membranes with integrated square-shaped porous feed spacers made of poly(ether sulfone) (PES). Various concentrations of PES (18, 20, 22, 25, and 28 wt %) in the 3D printing solution were employed to evaluate the impact of solution viscosity on 3D-printed spacer fidelity and membrane performance. Comparative analysis with the FS18 membrane, which utilizes a plastic polylactic acid (PLA) feed spacer and flat PES membrane, revealed a substantial improvement in pure water flux (31.0–130%) for the integrated membranes, mainly attributed to the augmented effective surface area (2.41–39.7%) created by the porous PES feed spacer patterns. However, this enhancement is viscosity-dependent, as evidenced by the reduced spacer pattern fidelity in the P18 (18 wt % PES) membrane with low-viscosity 3D printing solution, leading to diminished overall membrane effectiveness. Remarkably, when compared to the flat membrane, the integrated membranes (except P18 membrane) demonstrated better antifouling behavior, regardless of whether a plastic PLA feed spacer was used or not. This is attributed to elevated shear stresses on the porous spacer pattern peaks and induced turbulence, acting as a protective shield against severe membrane fouling. Overall, this study highlights the effectiveness of direct 3D printing in seamlessly integrating porous PES feed spacers onto membrane surfaces, offering potential for optimization and exploration of diverse polymers in the 3D printing process.

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Novel polyaniline–polyethersulfone nanofiltration membranes: effect of in situ polymerization time on structure and desalination performance

Abstract: Electroactive polyaniline (PANI) was layered on base PES asymmetric nanofiltration membrane using in situ solution-phase polymerization. PANI deposition time showed a significant effect on membranes' structural properties and desalination performance.

Cited by 5 publications

References 82 publications

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Synthesis of the Ag₂S/PANI@PES Composite Membrane and Its Antipollution Properties

Integration of Porous and Permeable Poly(ether sulfone) Feed Spacer onto Membrane Surfaces via Direct 3D Printing

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Novel polyaniline–polyethersulfone nanofiltration membranes: effect of in situ polymerization time on structure and desalination performance

Abstract: Electroactive polyaniline (PANI) was layered on base PES asymmetric nanofiltration membrane using in situ solution-phase polymerization. PANI deposition time showed a significant effect on membranes' structural properties and desalination performance.

Cited by 5 publications

References 82 publications

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Successful preparation of polyaniline‐modified polystyrene novel composite membrane

Synthesis of the Ag2S/PANI@PES Composite Membrane and Its Antipollution Properties

Integration of Porous and Permeable Poly(ether sulfone) Feed Spacer onto Membrane Surfaces via Direct 3D Printing

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Synthesis of the Ag₂S/PANI@PES Composite Membrane and Its Antipollution Properties