UV-LED induced bicontinuous microemulsions polymerisation for surface modification of commercial membranes – Enhancing the antifouling properties

Galiano, Francesco; Schmidt, S.; Ye, Xiaoyun; Kumar, Rohit; Mancuso, Raffaella; Curcio, Efrem; Gabriele, Bartolo; Hoinkis, Jan; Figoli, Alberto

doi:10.1016/j.seppur.2017.10.063

Cited by 36 publications

(25 citation statements)

References 36 publications

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“…As stated in the introduction, PBM polymerization induced by UV-LED light led to a lower filtration capacity of the PBM-coated membrane in model foulant tests compared to redox-polymerized PBM-coated membranes [7]. The two polymerization attempts differ with regard to the process sequence.…”

Section: Pore Intrusion Identification In Pbm-coated Membranes After mentioning

confidence: 94%

“…An alternative, based on photo-initiated UV-LED polymerization of PBM, was investigated by Schmidt [6] and Galiano et al [7]. In this case, the coating curing times were successfully reduced down to 30 s. Nevertheless, PBM polymerization induced by UV-LED light led to a lower filtration capacity in the model foulant tests inside a cross-flow unit treating a 100 mg•L −1 humic acid solution (pH 9) [7], probably due to a higher intrusion into the membrane pores with respect to redox-polymerized PBM.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications

et al. 2020

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Membrane modification is becoming ever more relevant for mitigating fouling phenomena within wastewater treatment applications. Past research included a novel low-fouling coating using polymerizable bicontinuous microemulsion (PBM) induced by UV-LED polymerization. This additional cover layer deteriorated the filtration capacity significantly, potentially due to the observed high pore intrusion of the liquid PBM prior to the casting process. Therefore, this work addressed an innovative experimental protocol for controlling the viscosity of polymerizable bicontinuous microemulsions (PBM) before casting on commercial ultrafiltration (UF) membranes. Prior to the coating procedure, the PBM viscosity modulation was carried out by controlled radical polymerization (CRP). The regulation was conducted by introducing the radical inhibitor 2,2,6,6-tetramethylpiperidine 1-oxyl after a certain time (CRP time). The ensuing controlled radical polymerized PBM (CRP-PBM) showed a higher viscosity than the original unpolymerized PBM, as confirmed by rheological measurements. Nevertheless, the resulting CRP-PBM-cast membranes had a lower permeability in water filtration experiments despite a higher viscosity and potentially lower pore intrusion. This result is due to different polymeric structures of the differently polymerized PBM, as confirmed by solid-state nuclear magnetic resonance (NMR) investigations. The findings can be useful for future developments in the membrane science field for production of specific membrane-coating layers for diverse applications.

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Section: Pore Intrusion Identification In Pbm-coated Membranes After mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications

et al. 2020

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“…These compounds are characterized by the presence, on one hand, of a quaternary ammonium moiety, which confers them a significant antimicrobial activity, and, on the other hand, of an acryloyloxy function, which make these compounds easily polymerizable either by radical- [47,48] or UV-induced [49] polymerization. The two active terminal moieties are distanced through a suitable alkyl chain linker.…”

Section: Introductionmentioning

confidence: 99%

New Polymeric Films with Antibacterial Activity Obtained by UV-induced Copolymerization of Acryloyloxyalkyltriethylammonium Salts with 2-Hydroxyethyl Methacrylate

Galiano

Mancuso

Guzzo

et al. 2019

IJMS

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New polymeric films with antibacterial activity have been prepared, by simple UV-induced copolymerization of readily available ω-(acryloyloxy)-N,N,N-triethylalcan-1-aminium bromides (or acryloyloxyalkyltriethylammonium bromides, AATEABs) with commercially available 2-hydroxyethyl methacrylate (HEMA), at different relative amounts. In particular, the antibacterial activity of polymeric films derived from 11-(acryloyloxy)-N,N,N-triethylundecan-1-aminium bromide (or acryloyloxyundecyltriethylammonium bromide, AUTEAB; bearing a C-11 alkyl chain linker between the acrylate polymerization function and the quaternary ammonium moiety) and 12-(acryloyloxy)-N,N,N-triethyldodecan-1-aminium bromide (or acryloyloxydodecyltriethylammonium bromide, ADTEB, bearing a C-12 alkyl chain linker) has been assessed against Gram-negative Escherichia Coli and Gram-positive Staphylococcus aureus cells. The results obtained have shown a clear concentration-dependent activity against both bacterial strains, the films obtained from homopolymerization of pure AUTEAB and ADTEAB being the most effective. Moreover, ADTEAB-based films showed a higher antibacterial activity with respect to the AUTEAB-based ones. Interestingly, however, both types of films presented a significant activity not only toward Gram-positive S. aureus, but also toward Gram-negative E. Coli cells.

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“…Surface modification can change hydrophilicity, selectivity, and permeability and reduce fouling in polymeric membranes . A great number of modification strategies have been employed for this purpose, as the use of specific additives, coating, interfacial polymerization, plasma treatment, graft polymerization, incidence of high energy particles, heat treatment, and chemical reactions as carboxylation, sulfonation, amination, and epoxidation . Some physical properties of the PECs, as chemical stability, hydrophilicity, and tunable surface charges, also make them interesting materials to modify the surface of polymer membranes .…”

Section: Introductionmentioning

confidence: 99%

Saccharomyces cerevisae microfiltration performance of polycarbonate membranes containing chitosan‐based polyelectrolyte complexes

Vale

Paranhos

2019

J of Applied Polymer Sci

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Polyelectrolyte complexes (PECs) were prepared using chitosan and sulfonated poly(ethylene terephthalate) by the mixture method. Fourier transform infrared spectroscopy, zeta potential, X-ray diffraction, and thermogravimetric analysis were used to characterize the chemical structure, surface charge, crystallinity, and thermal stability of the PECs. To evaluate how PECs affect the water vapor flux and the microfiltration performance, PECs solutions were spread via casting on polycarbonate microporous membranes. The increase in water vapor flux and in the Saccharomyces cerevisae microfiltration performance indicated that the presence of the PECs acts as fixed charges, changing significantly the transport properties of the polycarbonate matrix.

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UV-LED induced bicontinuous microemulsions polymerisation for surface modification of commercial membranes – Enhancing the antifouling properties

Cited by 36 publications

References 36 publications

Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications

Viscosity Modification of Polymerizable Bicontinuous Microemulsion by Controlled Radical Polymerization for Membrane Coating Applications

New Polymeric Films with Antibacterial Activity Obtained by UV-induced Copolymerization of Acryloyloxyalkyltriethylammonium Salts with 2-Hydroxyethyl Methacrylate

Saccharomyces cerevisae microfiltration performance of polycarbonate membranes containing chitosan‐based polyelectrolyte complexes

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