Concentration redistribution of low-molecular-weight salts of metals in the presence of a strongly swelling polyelectrolyte hydrogel

Budtova, Tatiana; Bel’nikevich, N. G.; Сулейменов, И. Э.; Frenkel, S.Ya.

doi:10.1016/0032-3861(93)90262-9

Cited by 29 publications

(30 citation statements)

References 3 publications

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“…Such behavior shown by network polymer can be explained by the binding of the low-molecular compound, attributed to the hydrogen bonds, and hydrophobic interactions, resulting in the increase of gel charge density. The same results were obtained earlier 5,8 in studies of interactions of ionogenic crosslinked and non-ionogenic linear polymers. Additional swelling of the network polymer can be attributed to the increase of charge density in the near-surface layer attributed to complex formation.…”

Section: Interaction Of Medicinal Compound Over Network Paasupporting

confidence: 86%

Immobilization of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine succinate over polyacrylic acid (PAA) gels. I. Study of interaction between linear and network PAA with succinate of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine

Zhumagalieva

Beisebekov

Abilov

2005

J of Applied Polymer Sci

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ABSTRACT:The interaction of water-soluble and crosslinked polyacrylic acid (PAA) with a medicinal compound (MC) of 2,5-dimethyl-4-benzoyl-oxypiperidine succinate was investigated. By methods of potentiometry, viscosimetry, and equilibrium swelling it was confirmed that the interaction of linear and network PAA with MC proceeds with complex formation. The degree of complex formation depends on the effect of pH, MC concentration, and degree of polyacid crosslinking.

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Section: Interaction Of Medicinal Compound Over Network Paasupporting

confidence: 86%

Immobilization of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine succinate over polyacrylic acid (PAA) gels. I. Study of interaction between linear and network PAA with succinate of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine

Zhumagalieva

Beisebekov

Abilov

2005

J of Applied Polymer Sci

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“…The mechanism of pressure arising in a hollow particle is quite complicated. It is determined by both osmotic effects as well as effects connected to polymer hydrogel swelling and peculiarities of polyelectrolyte behavior in aqueous solutions (electrostatic repulsion and hydration of charged groups39–42). Taking into account only osmotic phenomena leads to the values of polymer‐swelling pressure in the beginning of the process, up to several thousand kilograms per centimeter squared (several hundreds of megapascals) 43.…”

Section: Resultsmentioning

confidence: 99%

Hollow‐particle latexes: Preparation and properties

Pavlyuchenko

Sorochinskaya

Ivanchev

et al. 2001

J. Polym. Sci. A Polym. Chem.

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Hollow‐particle latexes were prepared according to the following stages: (1) the preparation of the methyl methacrylate–methacrylic acid (MAA)–ethylene glycol dimethacrylate copolymer (I) latex, (2) the preparation of a shell (II) based on polystyrene or styrene–acrylonitrile–divinyl benzene copolymer polymerized onto copolymer (I) particles, and (3) the neutralization of the core (I) carboxyl groups with a base (NH4OH or NaOH) at temperatures close to the glass‐transition temperature of the polymer (II). The neutralization resulted in the expansion of the particles and formed water‐filled hollow particles. The microspheres had an overall diameter of 460–650 nm and a hollow diameter of 300–450 nm. Rheological studies and particle size measurements by transmission electron microscopy and dynamic light scattering of the copolymer (I) latex indicate that the maximum particle swelling occurred at an approximately equimolar MAA/base ratio. It was found that even without the neutralization of the MAA units, a small hollow formation in the latex particles occurred during stage 2 because one volume of the copolymer (I) retained about 8 volume parts of water. It was also discovered that the final hollow‐particle geometry after neutralization depends on the shell copolymer thickness and type as well as on the conditions during stage 3, that is, the time, temperature, base type, and concentration. The opacifying ability of the synthesized hollow particles was investigated in latex coatings. The opacifying ability values were generally in agreement with the hollow‐particle geometry. The only exception was related to the copolymer (I)/copolymer (II) ratio. The maximum hollow volume was obtained at this value equal to 1/8, whereas the highest opacifying ability was observed at 1/10. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 1435–1449, 2001

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“…The values of the salt concentrations in-and outside the gel (CJ C,, and Co,,/Cp) as well the degree of purification and the degree of concentration (Ci,/Co and C, , &'o) were calculated according to eqs. (4)- (6). The amount of the purified water, Am, was chosen according to the possibility of using the "Faraday law" (the contraction must not be too high).…”

Section: T (Rnl")mentioning

confidence: 99%

Physical principles of using polyelectrolyte hydrogels for purifying and enrichment technologies

Budtova

Сулейменов

1995

J of Applied Polymer Sci

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SYNOPSISThe main physical regularities which allow one to use a strongly charged hydrogel in purifying and/or enrichment technologies are analyzed. The proposed cyclic method is based on the two known phenomena-the salt concentration redistribution in the presence of the polyelectrolyte hydrogel and the reversible gel contraction under electric current. It is shown that in order to obtain high degrees of purification and/or concentration the salt concentration must be lower than that of the polymer. Under these conditions, there is no dependence on the nature of the salt and the cycle may be repeated several times without regeneration of the gel. 0 1995 John Wiley & Sons, Inc.

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Concentration redistribution of low-molecular-weight salts of metals in the presence of a strongly swelling polyelectrolyte hydrogel

Cited by 29 publications

References 3 publications

Immobilization of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine succinate over polyacrylic acid (PAA) gels. I. Study of interaction between linear and network PAA with succinate of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine

Immobilization of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine succinate over polyacrylic acid (PAA) gels. I. Study of interaction between linear and network PAA with succinate of 2,5‐dimethyl‐4‐benzoyl‐oxypiperidine

Hollow‐particle latexes: Preparation and properties

Physical principles of using polyelectrolyte hydrogels for purifying and enrichment technologies

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