Polymeric Membranes in Catalytic Reactors

Vankelecom, Ivo F.J.

doi:10.1021/cr0103468

Cited by 301 publications

(138 citation statements)

References 184 publications

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“…21,22 These reactions can be catalyzed by alkyl tin salts. 23 An example of a trifunctional crosslinker for this purpose is vinyltrimethoxysilane (VTMS) [H 2 C=CHSi(OCH 3 ) 3 ], which also features a vinyl group (−CH=CH 2 ) in its structure that can be used to perform free radical polymerization. 24,25 Various organic functional groups can be incorporated into a material to be used in copper removal, such as the carboxyl, 26 hydroxyl, 27 amine, 28 2 ] is a hydrophilic monomer with ester and tertiary amine groups in its structure, along with a vinyl function allowing its polymerization.…”

Section: Introductionmentioning

confidence: 99%

Poly(dimethylsiloxane) and Poly[vinyltrimethoxysilane-co-2-(dimethylamino) ethyl methacrylate] Based Cross-Linked Organic-Inorganic Hybrid Adsorbent for Copper(II) Removal from Aqueous Solutions

Silva¹,

Chagas-Silva²,

Florenzano³

et al. 2016

Journal of the Brazilian Chemical Society

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An organic-inorganic hybrid adsorbent was prepared and its application for the uptake of Cu II ions from aqueous solutions was studied. The polymer network was composed of poly(dimethylsiloxane) (PDMS), vinyltrimethoxysilane (VTMS), and 2-(dimethylamino)ethyl methacrylate (DMAEMA), described as PDMS-net-P(VTMS-co-DMAEMA). The chemical groups, thermal stability and morphology of this hybrid adsorbent were characterized using techniques of attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). In adsorption studies, saturation of the active sites of the material was observed at pH 5, after 3 days, with each gram of material capable of adsorbing 0.48 mmol of copper(II). The fractionary-order and Sips models provided the best fits to the experimental data in kinetic and equilibrium studies of the adsorption process, respectively. Moreover, an acceptable reusability was found for this cross-linked organic-inorganic hybrid adsorbent after usage-regeneration cycles without significantly losing its original activity.

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Section: Introductionmentioning

confidence: 99%

Poly(dimethylsiloxane) and Poly[vinyltrimethoxysilane-co-2-(dimethylamino) ethyl methacrylate] Based Cross-Linked Organic-Inorganic Hybrid Adsorbent for Copper(II) Removal from Aqueous Solutions

Silva¹,

Chagas-Silva²,

Florenzano³

et al. 2016

Journal of the Brazilian Chemical Society

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“…Either the oxidation or the reduction of these chemicals by means of soft catalytic reactions might allow the treatment of some polluted water if the derived compounds are more easily removable. Furthermore, the combination of catalysis and membrane processes may change and separate pollutants through a single step [3].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the protective polymer not only influences particle size and morphology but can also have a tremendous influence on catalytic activity and/or selectivity. Thus, including nanoparticles inside polymeric membrane would yield to a useful material for process intensification [3,13,14].…”

Section: Introductionmentioning

confidence: 99%

Development of polymeric hollow fiber membranes containing catalytic metal nanoparticles

et al. 2010

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Metal Nanoparticles (MNPs) have unique physico-chemical properties advantageous for catalytic applications which differ from bulk material. However, the main drawback of MNPs is their insufficient stability due to a high trend for aggregation. To cope with this inconvenience, the stabilization of MNPs in polymeric matrices has been tested. This procedure is a promising strategy to maintain catalytic properties.The aim of this work is the synthesis of polymer-stabilized MNPs inside functionalized polymeric membranes in order to build catalytic membrane reactors. First, the polymeric support must have functional groups capable to retain nanoparticle precursors (i.e. sulfonic), Then, nanoparticles can grow inside the polymeric matrix by chemical reduction of metal ions.Two different strategies have been used in this work. Firstly, polyethersulfone microfiltration hollow fibres have been modified by applying polyelectrolyte multilayers. Secondly, polysulfone ultrafiltration membranes were modified by UV-photografting using sodium p-styrene sulfonate as a vinyl monomer. The catalytic performance of developed hollow fibers has been evaluated by using the reduction of nitrophenol to aminophenol by sodium borohydride. Hollow fibre modules with Pd MNPs have been tested in dead-end and cross-flow filtration. Complete nitrophenol degradation is possible depending on operation parameters such as applied pressure and permeate flux.

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“…The incorporation of reactive entities along the pore walls has been used to convert a membrane into a reactor with a high density of active sites within a small volume. 100,101 Alternatively, the addition of coordination chemistry allowed for the purification of feed solutions containing contaminants, such as heavy metal ions, by adsorption. 102,103 These examples utilized the transverse direction of the pores to simulate a staged process as the solution passed through the membranes.…”

Section: Modifying the Pore Wall Chemistry For Advanced Solute Separamentioning

confidence: 99%

Fit-for-purpose block polymer membranes molecularly engineered for water treatment

et al. 2018

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Continued stresses on fresh water supplies necessitate the utilization of non-traditional resources to meet the growing global water demand. Desalination and hybrid membrane processes are capable of treating non-traditional water sources to the levels demanded by users. Specifically, desalination can produce potable water from seawater, and hybrid processes have the potential to recover valuable resources from wastewater while producing water of a sufficient quality for target applications. Despite the demonstrated successes of these processes, state-of-the-art membranes suffer from limitations that hinder the widespread adoption of these water treatment technologies. In this review, we discuss nanoporous membranes derived from self-assembled block polymer precursors for the purposes of water treatment. Due to their well-defined nanostructures, myriad chemical functionalities, and the ability to molecularly-engineer these properties rationally, block polymer membranes have the potential to advance water treatment technologies. We focus on block polymer-based efforts to: (1) nanomanufacture large areas of highperformance membranes; (2) reduce the characteristic pore size and push membranes into the reverse osmosis regime; and (3) design and implement multifunctional pore wall chemistries that enable solute-specific separations based on steric, electrostatic, and chemical affinity interactions. The use of molecular dynamics simulations to guide block polymer membrane design is also discussed because its ability to systematically examine the available design space is critical for rapidly translating fundamental understanding to water treatment applications. Thus, we offer a full review regarding the computational and experimental approaches taken in this arena to date while also providing insights into the future outlook of this emerging technology.

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Polymeric Membranes in Catalytic Reactors

Cited by 301 publications

References 184 publications

Poly(dimethylsiloxane) and Poly[vinyltrimethoxysilane-co-2-(dimethylamino) ethyl methacrylate] Based Cross-Linked Organic-Inorganic Hybrid Adsorbent for Copper(II) Removal from Aqueous Solutions

Poly(dimethylsiloxane) and Poly[vinyltrimethoxysilane-co-2-(dimethylamino) ethyl methacrylate] Based Cross-Linked Organic-Inorganic Hybrid Adsorbent for Copper(II) Removal from Aqueous Solutions

Development of polymeric hollow fiber membranes containing catalytic metal nanoparticles

Fit-for-purpose block polymer membranes molecularly engineered for water treatment

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