Novel chlorine resistant low-fouling ultrafiltration membrane based on a hydrophilic polyaniline derivative

Huang, Xinwei; McVerry, Brian T.; Marambio-Jones, Catalina; Wong, Mavis C.Y.; Hoek, Eric M.V.; Kaner, Richard B.

doi:10.1039/c5ta00900f

Cited by 37 publications

(21 citation statements)

References 49 publications

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“…Figure 6(e),(f) confirm structural deterioration of PANI on exposure to chlorine as previously reported 82 . A slight change in PES surface roughness was observed after exposure to chlorine as shown in Figure 5(g)‐(h) whereas no changes were apparent in PES cross‐sectional images.…”

Section: Resultssupporting

confidence: 86%

“…Free chlorine concentration between 1–5 ppm is used for commercial routine cleaning. To evaluate chlorine tolerance, 250 ppm sodium hypochlorite solution was used at different pH values (4.5, 7.4, and 10.5), in agreement with literature 63–65 . Hypochlorite treatment efficacy is pH‐dependent due to dissociation into hypochlorous acid (HOCl) and the less active hypochlorite (OCl − ) 66 .…”

Section: Methodsmentioning

confidence: 99%

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Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Alhweij

Amura

Wenk

et al. 2021

J of Applied Polymer Sci

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Membranes heavily rely on chlorination to diminish (bio)fouling, but chlorination can also lead to membrane degradation. We developed sulfonated polyaniline (S‐PANI) ultrafiltration (UF) membranes with improved chlorine resistance and intrinsic antifouling properties. The S‐PANI membranes were synthesized through Non‐solvent Induced Phase Separation (NIPS). Membrane performance was evaluated under harsh chlorine conditions (250 ppm sodium hypochlorite for 3 days under different pH conditions). The S‐PANI membranes showed improved chlorine resistance including a stable performance without changes in model foulant BSA rejection. In contrast, PANI membranes suffered critical structural damage with complete leakage and commercial PES membranes showed a 76% increase in pure water flux and a noticeable change in BSA rejection. Small changes in S‐PANI membrane performance could be linked to membrane structural changes with pH, as confirmed by SEM, IR spectroscopy, and contact angle measurements. Additionally, the S‐PANI membranes showed better antifouling properties with a high flux recovery ratio in comparison to PANI membranes using alginic acid, humic acid, and BSA model foulants. Chemical cleaning by sodium hypochlorite re‐instated the transport properties to its initial condition. Overall, the developed S‐PANI membranes have a high chlorine tolerance and enhanced antifouling properties making them promising for a range of UF membrane applications.

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Section: Resultssupporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Alhweij

Amura

Wenk

et al. 2021

J of Applied Polymer Sci

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“…This property is also reflected in the flux data (Figure 7). It is generally well known that the membrane structure induced by the phase inversion process depends on both the rate of outer diffusion of the solvent (DMF) into the coagulation bath and the rate of inner diffusion of the non-solvent (water) into the cast thin film [32,33]. The formation of a polymer rich phase is initiated by the demixing process at the time of immersion of the cast film into the coagulation bath.…”

Section: Pesmentioning

confidence: 99%

High flux and fouling resistant flat sheet polyethersulfone membranes incorporated with graphene oxide for ultrafiltration applications

Abdel‐Karim

Leaper

Alberto

et al. 2018

Chemical Engineering Journal

210

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“…In this study, PSf was chosen because PSf membranes can be applied over a wide pH range from 2 to 12 and can be used at temperatures up to 105°C . PSf is also resistant to chlorine oxidation . Moreover, PSf is commercially available and has been widely used.…”

Section: Introductionmentioning

confidence: 99%

Comparison of two low‐hazard organic solvents as individual and cosolvents for the fabrication of polysulfone membranes

et al. 2019

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Petroleum-derived solvents commonly used in membrane fabrication are often hazardous and toxic, so the investigation of safer alternatives is important. In this study, two low-hazard solvents, methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate (Rhodiasolv ® PolarClean) and gamma-valerolactone (GVL), were investigated as sole solvents and as This contribution was identified by Lan Ying Jiang (Central South University-China) as the Best

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Novel chlorine resistant low-fouling ultrafiltration membrane based on a hydrophilic polyaniline derivative

Abstract: n-PANi, an outstanding candidate for making chlorine tolerant antifouling ultrafiltration membranes.

Cited by 37 publications

References 49 publications

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

High flux and fouling resistant flat sheet polyethersulfone membranes incorporated with graphene oxide for ultrafiltration applications

Comparison of two low‐hazard organic solvents as individual and cosolvents for the fabrication of polysulfone membranes

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