Effect of Porosity on Ion Transport Through Polymers and Polymer-Based Composites Containing Inorganic Nanoparticles (Review)

Dzyazko, Yuliya; Volfkovich, Yury M.; Perlova, O. V.; Ponomaryova, L.N.; Perlova, Nataliia; Kolomiets, E. A.

doi:10.1007/978-3-030-17755-3_16

Cited by 14 publications

(3 citation statements)

References 62 publications

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“…A comparison of pore size distribution determined using the mercury intrusion method for the thermally dried product (M/An/Cu) with those obtained for the thermally dried initial anion exchanger (M/An) [48] shows that after ZVC incorporation, macropores with a diameter exceeding 1 µm appeared, and the pore size distribution changed from uniform to wide-ranging dimensions. This change is probably a result of resin structure disintegration, since aggregates of Cu 0 deposited within pores of the supporting material may influence its resistance to osmotic pressure [49]. A further analysis of porous parameters (Table 5)-BET (Brunauer, Emmett and Teller) surface area (micro and mesoporous structure) and porosity determined by mercury intrusion (macro-and mesoporous structure)-which decreased significantly after Cu 0 deposition from 21.7 m 2 /g to almost 0.0 m 2 /g and from 29.8 to 4.7%, respectively, confirm the blockage and closure of porous structure of the host polymer with aggregates of the inorganic constituent.…”

Section: Studies Of Porositymentioning

confidence: 99%

Size-Controlled Transformation of Cu2O into Zero Valent Copper within the Matrix of Anion Exchangers via Green Chemical Reduction

et al. 2020

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Composite materials containing zero valent copper (ZVC) dispersed in the matrix of two commercially available strongly basic anion exchangers with a macroreticular (Amberlite IRA 900Cl) and gel-like (Amberlite IRA 402OH) structure were obtained. Cu0 particles appeared in the resin phase as the product of the reduction of the precursor, i.e., copper oxide(I) particles previously deposited in the two supporting materials. As a result of a one-step transformation of preformed Cu2O particles as templates conducted using green reductant ascorbic acid and under mild conditions, macroporous and gel-type hybrid products containing ZVC were obtained with a total copper content of 7.7 and 5.3 wt%, respectively. X-ray diffraction and FTIR spectroscopy confirmed the successful transformation of the starting oxide particles into a metallic deposit. A scanning electron microscopy study showed that the morphology of the deposit is mainly influenced by the type of matrix exchanger. In turn, the drying steps were crucial to its porosity and mechanical resistance. Because both the shape and size of copper particles and the internal structure of the supporting solid materials can have a decisive impact on the potential applications of the obtained materials, the results presented here reveal a great possibility for the design and synthesis of functional nanocrystalline solids.

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Section: Studies Of Porositymentioning

confidence: 99%

Size-Controlled Transformation of Cu2O into Zero Valent Copper within the Matrix of Anion Exchangers via Green Chemical Reduction

et al. 2020

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“…It is determined by the precipitation conditions (from deposition of zirconium hydroxophosphate from the ZrOCl2 solution or from sol of hydrated zirconium hydroxocomplexes) and porous structure of polymer matrix. As described in reviews [55,56], porous structure of ion exchange polymers occurs as a result of swelling. It is formed by hydrophilic and hydrophobic voids.…”

Section: Polymer-inorganic Resinsmentioning

confidence: 97%

Applications of Ion Exchange Resins in Water Softening

Dzyazko

2023

Materials Research Foundations

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Surface and groundwater always contain hardness ions (Ca2+ and Mg2+). The hardness is an important characteristic that provides the consumer properties of water. This parameter must be taken into consideration by the stations of water treatment, thermal power plants, the enterprises of chemical, food, pharmaceutical industries. Ion exchange resins, which are intended for water softening, are considered in this chapter. The negative effect of hardness ions on human health and equipment is also a focus of attention. Special approaches for increasing the efficiency of water softening are also reported. These approaches involve combining ion exchange with electrodialysis or ultrasound.

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“…Механізм провідності через кластери та канали описано у численних оглядах, наприклад [48]. Отже, протонна провідність дуже залежить від вмісту води в іонних каналах, а температурний інтервал ефективності обмежений 90 0 С. За більш високої температури мембрана зневоднюється -в результаті провідність протонів швидко зменшується.…”

Section: таблицяunclassified

MEMBRANES FUNCTIONALIZED WITH 1d, 2d and 3d CARBON MATERIALS

Rozhdestvenska¹,

Кudelko²,

Kolomiiets³

et al. 2021

Ukr. Chem. Journ.

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Modification of polymer and ceramic membranes by modern one-, two- and three- dimensional carbon nanomaterials (carbon nanotubes, fullerenes and their derivatives, oxidized and reduced graphene) is considered. It is shown that carbon materials can be incorporated into membrane matrices both as independent components and as a part of multicomponent modifier. The main methods of modification are the addition of modifiers to the polymer solution with subsequent making of polymer membranes, incorporation of nanoparticles of carbon nanomaterials into the pristine membranes, deposition on the outer membrane surface, formation of nanoparticles directly in the pores of the ceramic matrix. Composite membranes containing carbon nanoparticles are used for pervaporation, gas separation, baromembrane processes and low-temperature fuel cells. The addition of carbon nanomaterials to polymers provides better mechanical strength of the membranes. Hydrophilic carbon modifiers increase the resistance of membranes to fouling by organic substances and biofouling, improves their separation ability. Ion-exchange membranes modified with fullerenol and oxidized graphene maintain high proton conductivity at elevated temperatures and low humidity. Сarbon additives increase membrane productivity in baromembrane processes. This effect is especially evident for materials modified with nanotubes: their smooth surface ensures fast liquid transport. These carbon nanomaterials are characterized by antibacterial activity. Composites consisting of nanotubes and an ion-exchange biopolymer, and composites with oxidized graphene and inorganic ion exchanger, give to membranes selectivity to inorganic ions. Ceramic membranes modified with carbon nanoparticles that were formed in the pores of matrices by carbonization of synthetic polymers and polysaccharides have the same properties. Besides, these composites reject organic dyes too. The separating ability of composite membranes ocuures due to both dimensional and charge effects. Carbon or composite nanoparticles block the pores of the membranes. The pores formed by the modifier prevent penetration of large particles of organic substances, for example, protein macromolecules. The charge effect is realized due to the functional groups of the modifier. For membranes modified with fullerenols, the retaining of low molecular weight organic substances occurs due to adsorption. Fullerene-modified gas separation and pervaporation membranes show increased permeability and selectivity.

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Effect of Porosity on Ion Transport Through Polymers and Polymer-Based Composites Containing Inorganic Nanoparticles (Review)

Cited by 14 publications

References 62 publications

Size-Controlled Transformation of Cu2O into Zero Valent Copper within the Matrix of Anion Exchangers via Green Chemical Reduction

Size-Controlled Transformation of Cu2O into Zero Valent Copper within the Matrix of Anion Exchangers via Green Chemical Reduction

Applications of Ion Exchange Resins in Water Softening

MEMBRANES FUNCTIONALIZED WITH 1d, 2d and 3d CARBON MATERIALS

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