Hybrid membranes based on silica and 2-hydroxyethylmethacrylate–4-vinylpyridine copolymers

Лебедева, О. В.; Sipkina, E. I.; Pozhidaev, Yu. N.

doi:10.1134/s0965544116050091

Cited by 11 publications

(6 citation statements)

References 23 publications

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“…Along with an increase in electrical conductivity, mechanical strength, and heat resistance, a notable positive effect of the incorporation of silica or functionalized fillers on its basis into the membrane composition is the stabilization of the interphase interaction between the electrolyte and electrodes, an increase in the volume of channels providing ion transport, a decrease in the leaching of functional dopants (ionic liquids and mineral and organic acids), an increase in flexibility of composite membranes, etc. [17][18][19][20][21]24]. The presented data show good prospects for research on the development of ion-exchange membranes with silicone fillers.…”

Section: Introductionmentioning

confidence: 92%

“…A vast group of organic-inorganic ion-exchange membranes includes materials doped with silica [12][13][14][15][16][17][18][19][20]. Nanosized silica particles can be incorporated into membranes in the form of a finished product (e.g., aerosil, mesoporous silica, DMAC-ST-a SiO 2 sol dispersed in dimethylacetamide, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…Nanosized silica particles can be incorporated into membranes in the form of a finished product (e.g., aerosil, mesoporous silica, DMAC-ST-a SiO 2 sol dispersed in dimethylacetamide, etc.) [12][13][14][15][16] or obtained in the process of synthesis of a membrane via hydrolysis of tetraethoxysilane [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Proton-Exchange Hybrid Membranes: A Copolymer of Ethylene Glycol Vinyl Glycidyl Ether and Vinyl Chloride/Polyorganylsilsesquioxane

Лебедева

Малахова

Raskulova

et al. 2019

Membr. Membr. Technol.

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Copolymers of ethylene glycol vinyl glycidyl ether (VGE) and vinyl chloride (VC) have been obtained via radical copolymerization of VGE with VC at 70°C in the presence of the initiator azobisisobutyronitrile. By the sol-gel synthesis involving VGE-VC copolymers and carbofunctional organosilicon precursors, such as N,N'-bis(3-triethoxysilylpropyl)thiocarbamide (BTM) and 2-([triethoxysilylpropyl]amino)pyridine (TEAP), hybrid organic-inorganic membranes possessing proton conductivity after doping with orthophosphoric acid have been fabricated. The proton conductivity of the membranes in the temperature range of 30-80°C is characterized by the values of 3.52-4.88 × 10 −3 S cm −1 for VGE-VC/ BTM/H 3 PO 4 and 1.19-2.89 × 10 −3 S cm −1 for VGE-VC/TEAP/H 3 PO 4 .

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Proton-Exchange Hybrid Membranes: A Copolymer of Ethylene Glycol Vinyl Glycidyl Ether and Vinyl Chloride/Polyorganylsilsesquioxane

Лебедева

Малахова

Raskulova

et al. 2019

Membr. Membr. Technol.

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“…The most common approach to the formation of acid‐base membranes comprises the doping of polymers bearing the basic groups with mineral acids, sulfuric, or phosphoric. The major part of membranes derived from polymer derivatives of nitrogen‐containing heterocyclic compounds, for example, PBIs, 49 copolymers of 4‐vinylpyridine, 50 N‐vinylimidazole, 51 are doped with orthophosphoric acid.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of new proton‐exchange membranes based on poly‐1‐vinyl‐1,2,4‐triazole doped with phenol‐2,4‐disulfonic acid

Лебедева

Pozhidaev

Raskulova

et al. 2021

Intl J of Energy Research

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Poly-1-vinyl-1,2,4-triazole (PVT) was synthesized in isolated yield by free radical polymerization of 1-vinyl-1,2,4-triazole. The number average molecular weight and weight average molecular weight of the synthesized PVT, determined by gel permeation chromatography, was 88 567 and 153 309 Da, respectively. PVT had a unimodal molecular weight distribution with a polydispersity coefficient of 1.7. Mixing PVT with phenol-2,4-disulfonic acid (PDSA) in the presence of a polyvinyl alcohol cross-linked with oxalic acid produces proton exchange membranes having different PVT:PDSA ratios. The composition and structure of the membranes were established by elemental analysis, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance spectroscopy (NMR). FT-IR and 15 N NMR studies have shown that the interaction of PVT with PDSA was accompanied by the formation of acid-base complexes due to proton transfer from PDSA to the triazole rings of PVT. Formation of acid-base complexes PVT-PDSA additionally stabilizes membranes and increases their thermal stability. The SEM study showed that the membrane surface was homogeneous. The properties of membranes, such as thermal and oxidative stability, ion-exchange capacity, proton conductivity, water uptake, and their mechanical properties, have been studied. The commercial membrane Nafion 212 was used as a comparison. The proton conductivity of membranes increases with an increase in the content of PDSA in their composition and for membranes 1-3 was 59.80, 7.30, 6.23 mS/cm, respectively. The activation energies for proton transfer across the membranes were 19.5, 21.6, and 38.2 kJ/mol for the membranes 1-3, respectively. Water uptake, ion-exchange capacity, and proton conductivity depend on the content of PDSA in the membrane. The membranes obtained were tested in a test cell of an ElectroChem hydrogen fuel cell (USA) at a temperature of 25 C with the supply of humidified hydrogen and air.

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“… Earlier we have obtained hybrid composites based on silica and 2-hydroxyethylmethacrylate-4-vinylpyridine copolymers, which possess high ion-exchange capacity (2.1 mg-eq/g). Composites based on poly[N,N'-bis(3silsesquioxanilpropyl)-thiocarbamide] showed complexing activity with respect to Pt(IV) (70 mg/g) [4]. In this connection, it was of interest to create composites that simultaneously combine these two components.…”

Section: Introductionmentioning

confidence: 99%

Composite Polymer-Silicone Adsorbent for Platinum (IV) Ions: Investigation of Models and Absorption Kinetics

Лебедева¹,

Pozhidaev²,

Konovalenko³

et al. 2018

Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018)

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The adsorption of platinum (IV) in hydrochloric acid solutions of a composite based on N,N-bis(3triethoxysilylpropyl)thiourea and 4-vinylpyridine-2-hydroxyethylethacrylate copolymer is studied. The value of the static adsorption capacity of the composite for platinum(IV) is found to be 215 mg/g. To describe the nature of the adsorption, Langmuir, Freundlich, and Dubinin-Radushkevich models are used. The adsorption kinetics is estimated using Boyd-Adamson models of pseudo-first and pseudo-second order and the Elovich equation.

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Hybrid membranes based on silica and 2-hydroxyethylmethacrylate–4-vinylpyridine copolymers

Cited by 11 publications

References 23 publications

Proton-Exchange Hybrid Membranes: A Copolymer of Ethylene Glycol Vinyl Glycidyl Ether and Vinyl Chloride/Polyorganylsilsesquioxane

Proton-Exchange Hybrid Membranes: A Copolymer of Ethylene Glycol Vinyl Glycidyl Ether and Vinyl Chloride/Polyorganylsilsesquioxane

Synthesis and characterization of new proton‐exchange membranes based on poly‐1‐vinyl‐1,2,4‐triazole doped with phenol‐2,4‐disulfonic acid

Composite Polymer-Silicone Adsorbent for Platinum (IV) Ions: Investigation of Models and Absorption Kinetics

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