Physical principles of using polyelectrolyte hydrogels for purifying and enrichment technologies

Budtova, Tatiana; Сулейменов, И. Э.

doi:10.1002/app.1995.070571312

Cited by 14 publications

(9 citation statements)

References 8 publications

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“…Reversible collapse of polyelectrolyte hydrogels and its applications are continuously studying in current literature. Thus, on this base biomimetic devices [1,2], ecological technologies [3], etc may be developed. Y.Osada et al reported a number of experiments demonstrating wide possibilities of application of hydrogels for transformation of energy from the one form to another [4].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Description of Polyelectrolyte Hydrogel Collapse in Electric Field

Сулейменов

Pereladov²,

Bekturov³

2017

Eurasian Chem. Tech. J.

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Theory of collapse of polyelectrolyte hydrogels under the influence of direct electric current is developed. The theory is based on the consideration of the motion of gel-solution boundary. It is shown that this boundary is moving with constant velocity on the first stage of the collapse (some part of hydrogel stayed undeformed). This velocity is theoretically determined by analysis of boundary conditions only (electric current density conservation). It is shown that on the first stage of the process hydrogel collapse caused by direct electric current is described completely by Faraday’s law analog. Hydrogel collapse is described by exponential form of Faraday’s law analog on the second stage. On this stage the whole specimen is deformed. The comparison of proposed theory and results obtained early is carried out. It is shown that the theory is in good accordance with experimental data.

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Section: Introductionmentioning

confidence: 99%

Theoretical Description of Polyelectrolyte Hydrogel Collapse in Electric Field

Сулейменов

Pereladov²,

Bekturov³

2017

Eurasian Chem. Tech. J.

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“…These have a number of potential applications in the pharmaceutical, food, and environmental industries. [4][5][6] There has also been considerable recent activity in the incorporation of such polyelectrolytes and hydrogels into conducting polymers based on polypyrrole and polyaniline, to generate composites that combine favorable structural and processability features with good conductivity. [7][8][9][10] Optically active synthetic polymers, including gels and chiral conducting polymers are also of current interest because of their chiral recognition properties and their potential applications for asymmetric synthesis, as chiral stationary phases in HPLC and as chiral membranes for the separation of mixtures of enantiomers.…”

Section: Introductionmentioning

confidence: 99%

“…Such monomers have also been used to form hydrogels with cross-linked, interpenetrated networks. These have a number of potential applications in the pharmaceutical, food, and environmental industries. − …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Polymerization of Chiral Acrylamidosulfonic Acids

et al. 1998

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Reductive amination of (1S)-(+)-10-camphorsulfonic acid with NaCNBH3/NH4OAc has afforded diastereomeric exo-and endo-aminosulfonic acids, that can be separated by crystallization from methanol. Treatment of these diastereomers with acryloyl chloride gave high yields of novel, chiral acrylamides that incorporate both a sulfonic acid substituent and a chiral auxiliary. The free radical (AIBN) polymerization of these acrylamides gave high yields (84-90%) of novel, water-soluble polyacrylamides (M w ) 5500-7800). 1 H NMR studies showed these to be essentially atactic. Their circular dichroism spectra were similar to their corresponding acrylamide monomers. This indicates that the sulfonic acid chiral auxiliary in the monomer precursors does not induce and/or maintain macroasymmetry in the resulting polyacrylamide chains. Hydrogels with equilibrium water contents as high as 99.96% could be obtained by copolymerizing {(NH 4)2S2O8 initiator} these chiral acrylamides with equimolar acrylamide and varying ratios of N,N′-methylenebisacrylamide as cross-linker.

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“…Наиболее экологически приемлемыми являются методики опреснения, основанные на использовании цикла сжатия -набухания гидрогелей. В настоящее время известен целый ряд разновидностей такого рода методик опреснения [6,7], причем теоретическое описание любой из них укладывается в концепцию, восходящую к [1].…”

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“…Однако их практическое использование затруднено необходимостью создавать ионные токи (например, вызывающие коллапс гидрогелей) при помощи сторонних сил (электрический ток [6] или механическое воздействие [7]). В то же время существует возможность реализовать ионный ток непосредственно при помощи протекания раствора через гель (Рис.1).…”

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Equivalent radio engineering schemes of systems based on polyelectrolyte hydrogels and their practical use

Mun¹,

Yegemberdyeva²,

Temyrkanova³

et al. 2012

Bulletin of the Nat. Eng. Ac. of the RK

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It is theoretically predicted that when a solution of a low-molecular salt flows through a polyelectrolyte grid, electromotive forces can occur, the sign of which depends on the sign of the grid charge. This phenomenon can be used in the development of new desalination systems, but its further study requires the development of specific measuring instruments and experimental research methods. Such techniques can be created due to the fact that systems based on hydrogels of the type in question have equivalent radio engineering circuits, which include reactive components (capacitors). The presence of capacitors in the equivalent circuit is associated with the formation of double electrical layers at the boundary of the hydrogel and the solution. For grids with a high charge density, the amplitude of such layers can be determined directly based on the analysis of the balance of ion currents in the system. The capacitance of the capacitors included in the equivalent circuit can be measured by recording the phase shift between current and voltage as a function of frequency. This, in turn, allows us to develop a methodology for experimental research of systems of the type under consideration using probing alternating currents of small amplitude (the method of radio-technical sounding).

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Physical principles of using polyelectrolyte hydrogels for purifying and enrichment technologies

Cited by 14 publications

References 8 publications

Theoretical Description of Polyelectrolyte Hydrogel Collapse in Electric Field

Theoretical Description of Polyelectrolyte Hydrogel Collapse in Electric Field

Synthesis and Polymerization of Chiral Acrylamidosulfonic Acids

Equivalent radio engineering schemes of systems based on polyelectrolyte hydrogels and their practical use

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