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>3.0.co;2-9

Cited by 33 publications

(15 citation statements)

References 27 publications

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“…In bicontinuous microemulsions, the monomer is generally polymerized either in the aqueous phase or in the organic phase . Usually, in order to avoid the disruption of the initial microstructure, simultaneous crosslinking is necessary during the polymerization in the organic or aqueous phase of the bicontinuous microemulsion.…”

Section: Introductionmentioning

confidence: 99%

Surfactant‐directed morphology of cross‐linked styrene‐ or vinylbenzyl chloride‐based materials

Karamitrou

Sarpaki

Bokias

2016

J of Applied Polymer Sci

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Polystyrene (PSt) or poly(vinylbenzyl chloride) (PVBC) crosslinked with divinylbenzyl (DVB) materials were synthesized through free radical polymerization into templates formed by the surfactant polyoxyethylene (4) lauryl ether (Brij-30). The chemical composition of the final products was verified through attenuated total reflectance infrared spectroscopy (ATR-IR) and the thermal behavior was investigated through thermogravimetric analysis (TGA). Depending on the organization of Brij-30 in aqueous solution, three characteristic structures, namely spherical nanoparticles, platelet-like objects and three-dimensional networks, were identified through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The spherical nanoparticles and the platelet-like objects form rather stable dispersions, especially in aqueous surfactant solutions, as exemplified by the evolution of the turbidity of the PSt-based materials, using sodium dodecyl sulfate as surfactant. All materials retain their integrity even after thermal treatment at high temperature (200-2508C). The benzyl chloride group of the PVBC-based materials offers a significant potential for further elaboration and practical applications, since they can be further functionalized while retaining their integrity. This potential is demonstrated here through hydrolysis to obtain hydroxyl-functionalized three-dimensional networks.

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Section: Introductionmentioning

confidence: 99%

Surfactant‐directed morphology of cross‐linked styrene‐ or vinylbenzyl chloride‐based materials

Karamitrou

Sarpaki

Bokias

2016

J of Applied Polymer Sci

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“…33,34 Moreover, the long PEO groups of PEO-R-MA-40 anchored on the surface of latex particles provide a permanent steric stabilization for the long-term stability of latexes. Although extensive work based on PEO-R-MA-40 has been reported for dispersion polymerization, 35,36 emulsion polymerization, 33 microemulsion copolymerization 37,38 and so forth, there is little information about miniemulsion polymerization to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

One-pot synthesis of amphiphilic reversible photoswitchable fluorescent nanoparticles and their fluorescence modulation properties

et al. 2012

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In the present study, we report on the fabrication of novel amphiphilic reversible photoswitchable fluorescent nanoparticles by a facile one-pot miniemulsion polymerization using a biocompatible polymerizable nonionic surfactant, u-methoxy poly(ethylene oxide) undecyl a-methacrylate (PEO-R-MA-40), in which spiropyran-linked methacrylate (SPMA) and the energy level well-matched fluorescent dyes: fluorescein-based, vinylic crosslinking monomer (fluorescein-O,O-bis-propene (FBP)) were covalently incorporated into polymeric matrix during the polymerization process. Under the alternative irradiation of UV and visible light, the fluorescent emission of FBP dye in nanoparticles can be reversibly modulated by cyclical transformation of spiropyran moieties' structure on the basis of intra-particle FRET process between FBP and merocyanine (MC) state of spiropyran. The as-prepared fluorescent nanoparticles display high dye load, as well as controllable amount and ratio of the two dyes because of covalent linkage between dye molecules and the particle. Moreover, the observed FRET efficiencies (66.3-98.5%) can be facilely tuned by controlling the amount (ratio) of the two chromophores. Overall, significant features of these novel amphiphilic reversible photoswitchable fluorescent nanoparticles include higher biocompatibility and photostability, relatively fast photoresponsivity and better photoreversibility as compared to some previous reported systems, which are promising for biological, optical fields and so on.

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“…In particular, there has been increasing interest in the preparation of porous, polymeric solids through the polymerization of monomers containing microemulsions 6, 7. Therefore, this procedure is an attractive route for preparing filtration and separation membranes,8 scaffolds for tissue engineering, stationary phases for capillary electrochromatography,9 and so forth. Recently, microemulsion photopolymerization has been initiated with water‐soluble photoinitiators for the production of polymers with specific reactive end groups,10 which may have significant utility in a variety of important technological applications, including high‐performance, low‐volatile‐organic‐compound acrylic thermoset coatings.…”

Section: Introductionmentioning

confidence: 99%

Photoinitiated polymerization in bicontinuous microemulsions: Fluorescence monitoring

Peinado¹,

Bosch²,

Martín³

et al. 2006

J. Polym. Sci. A Polym. Chem.

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The photopolymerization of bicontinuous microemulsions was simultaneously monitored with differential scanning calorimetry and fluorescence. The kinetics and mechanism of the reaction were studied throughout the entire photopolymerization reaction. The role played by the surfactant in the kinetics and morphology was studied. The nature of the surfactant changed the autoacceleration process and final conversion. The behavior was explained as a result of the differences in the interfacial properties. Anionic cetyltrimethylammonium bromide (CTAB) gave rise to a more flexible interfacial film than anionic sodium dodecyl sulfate (SDS), resulting in competition between the intramolecular and intermolecular reactions in the former systems. As cyclization did not contribute to the increase in the degree of crosslinking, SDS photopolymerization gave solids with a more rigid microstructure. Fluorescence methodology was applied to monitor bicontinuous microemulsion polymerization and to reveal the microstructure and morphology development during photopolymerization. The microemulsion composition was designed to prepare nanoporous, crosslinked materials. Even though the nanostructure of the precursor microemulsions was not retained because of phase separation during polymerization, mesoporous solids were obtained. Their morphologies depended on the nature of the surfactant, and membranes with open cells were successfully prepared with CTAB, whereas more complex morphologies resulted with SDS. V V C 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: [5291][5292][5293][5294][5295][5296][5297][5298][5299][5300][5301][5302][5303] 2006

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

Cited by 33 publications

References 27 publications

Surfactant‐directed morphology of cross‐linked styrene‐ or vinylbenzyl chloride‐based materials

Surfactant‐directed morphology of cross‐linked styrene‐ or vinylbenzyl chloride‐based materials

One-pot synthesis of amphiphilic reversible photoswitchable fluorescent nanoparticles and their fluorescence modulation properties

Photoinitiated polymerization in bicontinuous microemulsions: Fluorescence monitoring

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