Peculiarities of the kinetics of polyelectrolyte hydrogel collapse in solutions of copper sulfate

Budtova, Tatiana; Сулейменов, И. Э.; Frenkel, S.Ya.

doi:10.1016/0032-3861(95)91452-d

Cited by 21 publications

(24 citation statements)

References 11 publications

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“…It was attributed to a decrease in the content of charged carboxylate groups in the macromolecules as a result of their interaction with polyvalent metal ions with the formation of the insoluble polymeric salt [4,5]. The shape of the swelling curves of PEHGs based on PANH proves that in this case the swollen polymer also undergoes collapse in the presence of Сu 2+ , Zn 2+ , and Mn 2+ ions.…”

Section: Resultsmentioning

confidence: 96%

“…The possible cause of this undesirable phenomenon in the case of PEHGs based on PANH is their collapse as a result of interaction of functional groups of the polymer with microelement ions. This phenomenon was discovered previously when studying the kinetics of water absorption by PEHG with carboxylate functional groups [4,5]. However, as applied to PAHGs based on PANH, the water absorption kinetics, including that in the presence of microelement ions, has not yet been studied.…”

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confidence: 93%

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Effect of Cu2+, Zn2+, and Mn2+ ions on the water absorption of polyelectrolyte hydrogels based on polyacrylonitrile fiber hydrolyzate

et al. 2014

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Polyelectrolyte hydrogels based on 40% aqueous-salt solutions of polyacrylonitrile fi ber hydrolyzate were prepared using products of thermal decomposition of ammonium persulfate as cross-linking agent. Swelling of these gels in aqueous solutions of zinc, copper, and manganese sulfates is followed by the inverse process leading to the collapse of the hydrogels. The use of complex salts of the above ions prevents the inverse process. The relationships characterizing the infl uence of the cross-linking agent concentration on the initial swelling rate and on the equilibrium and maximum swelling in distilled water and in 0.01 M solutions of copper sulfate and disodium copper ethylenediaminetetraacetate were determined.

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Section: Resultsmentioning

confidence: 96%

mentioning

confidence: 93%

Effect of Cu2+, Zn2+, and Mn2+ ions on the water absorption of polyelectrolyte hydrogels based on polyacrylonitrile fiber hydrolyzate

et al. 2014

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“…During the first days of the interaction the hydrogels increase their volume additionally, then they begun to shrink. Such a behavior can be explained from the viewpoint of diffusion theory for swelling of polyelectrolyte hydrogels [16]. According to the theory the swelling of polyelectrolyte hydrogels is considerably dependent on the charge density of their surface.…”

Section: Interaction Of Chitosan With Hydrogels Of Poly (Acrylic Acid)mentioning

confidence: 99%

Interaction of Chitosan with Hydrogel of Poly(Acrylic Acid) and Preparation of Encapsulated Drugs

Bo¹,

Khutoryanskiy²,

Kan³

et al. 2017

Eurasian Chem. Tech. J.

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The complexation of linear chitosan with hydrogel of poly(acrylic acid) was studied in acetic acid solutions. It was found that the complexation is accompanied by contraction of hydrogel samples with formation of turbid layer on their surface. The dynamic changes of swelling ratio of poly(acrylic acid) hydrogel in course of the interaction with chitosan are interpreted from the diffusion theory point of view considering the properties of double electric layer on hydrogel-solution boundary. The FTIR spectroscopy method revealed the electrostatic mechanism of interaction between poly(acrylic acid) hydrogel and chitosan. The spectrum of polycomplex shows the bands, which are characteristic for both poly(acrylic acid) (1725, 1450, 1249 cm -1 ) and chitosan (1648, 1536, 1165, 1091, 1023 cm -1 ) confirming the sorption of the later polymer by hydrogel of poly(acrylic acid). The possibility of encapsulation of antibiotic levomycetin into polycomplex hydrogels as well as its release from the capsules has been studied. It was found that the maximal value of the drug released from the polycomplex capsule is achieved after the longer period in comparison with control experiment with its release from pure PAA hydrogel. It was shown that the interpolymer interactions between oppositely charged linear polymers and hydrogels could be successfully used for preparation of encapsulated forms of various physiologically active substances.

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“…It was shown that complexation takes place due to the hydrogen bonding between carboxyl groups of the hydrogels and the ether oxygen atoms of the PEG. The gel volume is highly sensitive to a change in the concentration or molecular mass of the lin-ear polymer 2,4,5) and pH 3,4) or temperature 2,6) of the external solution. The reentrant swelling of the gel volume occurs at higher concentrations of the PEG solution 2,4) .…”

Section: Introductionmentioning

confidence: 99%

Formation-destruction conditions of an interpolymer complex between a poly(acrylic acid) gel and linear poly(ethylene glycol) in methanol

Bekturov

Frolova

Mamytbekov

2000

Macromol. Chem. Phys.

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Peculiarities of the kinetics of polyelectrolyte hydrogel collapse in solutions of copper sulfate

Cited by 21 publications

References 11 publications

Effect of Cu2+, Zn2+, and Mn2+ ions on the water absorption of polyelectrolyte hydrogels based on polyacrylonitrile fiber hydrolyzate

Effect of Cu2+, Zn2+, and Mn2+ ions on the water absorption of polyelectrolyte hydrogels based on polyacrylonitrile fiber hydrolyzate

Interaction of Chitosan with Hydrogel of Poly(Acrylic Acid) and Preparation of Encapsulated Drugs

Formation-destruction conditions of an interpolymer complex between a poly(acrylic acid) gel and linear poly(ethylene glycol) in methanol

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