Nanofiltration membranes prepared by direct microemulsion copolymerization using poly(ethylene oxide) macromonomer as a polymerizable surfactant

Liu, J.; Teo, W. K.; Chew, C. H.; Gan, L. M.

doi:10.1002/1097-4628(20000919)77:12<2785::aid-app270>3.3.co;2-0

Cited by 3 publications

(3 citation statements)

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“…The presence of the acrylate group makes the AUTEAB surfactant reactive and polymerizable avoiding any possibility of leaching. After the polymerization, the surfactant becomes, in fact, chemically bonded to the membrane matrix enhancing the hydrophilicity of the overall membrane [24] and guaranteeing antimicrobial activity. This also ensures preventing the leaching of the surfactant from the membrane.…”

Section: Auteab Synthesismentioning

confidence: 99%

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Galiano

Figoli

Deowan

et al. 2015

Journal of Membrane Science

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a b s t r a c tAn innovative hydrophilic and anti-fouling coating material for application in membrane technology for wastewater treatment has been developed by polymerization of a polymerizable bicontinuous microemulsion (PBM) and used for surface modification of a commercial flat polyethersulfone (PES) membrane. The novel nanostructured coating has been produced using acryloyloxyundecyltriethylammonium bromide (AUTEAB) as a co-polymerizable surfactant, obtained through a synthetic method characterized by a lower cost and a higher reproducibility compared to other known polymerizable surfactants. The novel composite membranes have been characterized and compared with the uncoated PES membranes. Coated membranes resulted in a smoother surface and a higher hydrophilicity with respect to the uncoated ones, and showed a particular nano-size channel-like morphology making them highly resistant to the fouling phenomenon. The covalent anchorage of the surfactant on the membrane surface ensured the embedment of the molecule in the polymeric matrix avoiding its leaching and also leading the coated membranes to have significant antimicrobial activity, which is very important for reducing the biofouling phenomenon.All these aspects make the tailored coating material an ideal and efficient coating for modifications of commercial membrane surfaces, to be used in membrane processes in wastewater treatment.

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Section: Auteab Synthesismentioning

confidence: 99%

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Galiano

Figoli

Deowan

et al. 2015

Journal of Membrane Science

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“…5,29,30 An important materials advance in this area has come from development of a class of polymerizable poly(ethylene glycol) dimethacrylate (PEG-DMA) fluids. They provide a means for preparing optically transparent films with features conformable to the nanoscale by thermal 5,31,32 and/or photochemical polymerization. 33, 34 We previously reported on the spectroscopic and photophysical properties of a series of polypyridyl ruthenium(II) complexes, including Ru(bpy) 3 2+ (bpy = 2,2′-bipyridine), in a PEG-DMA fluid and films containing nine ethylene glycol spacers (PEG-DMA550: Scheme 1).…”

Section: ■ Introductionmentioning

confidence: 99%

Excited-State Dynamics in Rigid Media: Evidence for Long-Range Energy Transfer

et al. 2013

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In semirigid PEG-DMA550 films with the added anthracene derivatives PEG-An and Acr-An, energy transfer quenching of the metal-to-ligand charge transfer excited state Ru(bpy)3(2+)* to give -(3)An occurs by both rapid, static, and slow, diffusional quenching processes. The appearance of -(3)An was verified by transient absorption measurements. The kinetics of the two quenching processes have been analyzed by a Stern-Volmer kinetic analysis. The data for static quenching are consistent with energy transfer quenching with a distance dependence consistent with Dexter (exchange) energy transfer. On the basis of this analysis Bohr radii were found to be 26 and 11 Å for PEG-An and Acr-An, respectively. Evidence for triplet-triplet annihilation between triplet anthracene excited states in the films was obtained from the concentration dependences of excited-state decay. These results provide evidence for long-range energy migration between derivatized anthracenes in rigid, cross-linked PEG-DMA550 films.

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“…Nanoporous materials have also been used in size exclusion-based separation processes such as membrane filtrations. For example, nanofilters based on nanostructured membranes have been used for separation of small molecules such as vitamin B12 (Vacassy et al, 1997) or water-ethanol (Liu et al, 2000). Desai et al (1999) used microfabrication technology to produce silicon membranes with well-controlled and uniform pore sizes which can retain larger proteins such as immunoglobulin G (IgG) while being permeable to smaller proteins like insulin.…”

Section: Bioseparationsmentioning

confidence: 99%