TY  - JOUR
AU  - Kostić, Aleksandar Ž.
AU  - Adnađević, Borivoj
AU  - Popović, Aleksandar R.
AU  - Jovanovic, Jelena
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/892
AB  - The isothermal kinetics Curves of the swelling of a poly(acrylic acid) hydrogel in distilled water and physiological Solution at temperatures ranging from 20 to 40 degrees C were determined. The possibility of applying both the Fick's kinetics model anti kinetics model of the first order chemical reaction to the swelling kinetics of the PAA hydrogel in distilled water and physiological Solution were examined. It was found that the possibilities of applying these models were limited. The new model of the kinetics of swelling in distilled water and physiological solution was established. The kinetic parameters (E-a, ln A) for the swelling in distilled water and physiological solution were determined. The decrease of the equilibrium degree of swelling and the saturation swelling rate of the swelling of the PAA hydrogel in physiological solution compared to swelling in distilled water could be explained by the decreased differences in the ionic osmotic pressures between the hydrogel and the swelling medium. The increase of the initial swelling rate in the physiological solution might be caused by an increased density of charges at the network and by an increased affinity of the network towards the water molecules. The increase of the activation energy of the swelling of the PAA hydrogel in the physiological solution is a consequence of its additional "ionic crosslinking".
AB  - U radu su ispitivane izotermalne kinetičke krive bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u destilovanoj vodi i fiziološkom rastvoru u temperaturnom opsegu od 20 do 40 °C. Ispitivana je mogućnost primene Fikovog kinetičkog modela kao i kinetike i reda hemijskih reakcija na kinetiku bubrenja poliakrilnog hidrogela.Utvrđeno je da su mogućnosti za njihovu primenu vrlo ograničene. Iz tih razloga primenjen je novi model kinetike bubrenja. Određeni su kinetički parametri (Ea, lnA) za procese bubrenja u destilovanoj vodi i fiziološkom rastvoru. Smanjenje ravnotežnog stepena bubrenja i saturacione brzine bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u fiziološkom rastvoru u odnosu na destilovanu vodu može se objasniti smanjenjem razlike u jonskom osmotskom pritisku između hidrogela i medijuma za bubrenje. Povećanje inicijalne brzine bubrenja u fiziološkom rastvoru u odnosu na destilovanu vodu prouzrokovano je povećanjem gustine naelektrisanja na polimernoj mreži i povećanim afinitetom prema molekulima vode. Povećanje energije aktivacije hidrogela delimično neutralisane poli(akrilne) kiseline pri bubrenju u fiziološkom rastvoru se objašnjava dodatnim "jonskim umreženjem" hidrogela u fiziološkom rastvoru.
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution
T1  - Poređenje kinetike bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u destilovanoj vodi i fiziološkom rastvoru
VL  - 72
IS  - 11
SP  - 1139
EP  - 1153
DO  - 10.2298/JSC0711139K
ER  - 

@article{
author = "Kostić, Aleksandar Ž. and Adnađević, Borivoj and Popović, Aleksandar R. and Jovanovic, Jelena",
year = "2007",
abstract = "The isothermal kinetics Curves of the swelling of a poly(acrylic acid) hydrogel in distilled water and physiological Solution at temperatures ranging from 20 to 40 degrees C were determined. The possibility of applying both the Fick's kinetics model anti kinetics model of the first order chemical reaction to the swelling kinetics of the PAA hydrogel in distilled water and physiological Solution were examined. It was found that the possibilities of applying these models were limited. The new model of the kinetics of swelling in distilled water and physiological solution was established. The kinetic parameters (E-a, ln A) for the swelling in distilled water and physiological solution were determined. The decrease of the equilibrium degree of swelling and the saturation swelling rate of the swelling of the PAA hydrogel in physiological solution compared to swelling in distilled water could be explained by the decreased differences in the ionic osmotic pressures between the hydrogel and the swelling medium. The increase of the initial swelling rate in the physiological solution might be caused by an increased density of charges at the network and by an increased affinity of the network towards the water molecules. The increase of the activation energy of the swelling of the PAA hydrogel in the physiological solution is a consequence of its additional "ionic crosslinking"., U radu su ispitivane izotermalne kinetičke krive bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u destilovanoj vodi i fiziološkom rastvoru u temperaturnom opsegu od 20 do 40 °C. Ispitivana je mogućnost primene Fikovog kinetičkog modela kao i kinetike i reda hemijskih reakcija na kinetiku bubrenja poliakrilnog hidrogela.Utvrđeno je da su mogućnosti za njihovu primenu vrlo ograničene. Iz tih razloga primenjen je novi model kinetike bubrenja. Određeni su kinetički parametri (Ea, lnA) za procese bubrenja u destilovanoj vodi i fiziološkom rastvoru. Smanjenje ravnotežnog stepena bubrenja i saturacione brzine bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u fiziološkom rastvoru u odnosu na destilovanu vodu može se objasniti smanjenjem razlike u jonskom osmotskom pritisku između hidrogela i medijuma za bubrenje. Povećanje inicijalne brzine bubrenja u fiziološkom rastvoru u odnosu na destilovanu vodu prouzrokovano je povećanjem gustine naelektrisanja na polimernoj mreži i povećanim afinitetom prema molekulima vode. Povećanje energije aktivacije hidrogela delimično neutralisane poli(akrilne) kiseline pri bubrenju u fiziološkom rastvoru se objašnjava dodatnim "jonskim umreženjem" hidrogela u fiziološkom rastvoru.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution, Poređenje kinetike bubrenja hidrogela delimično neutralisane poli(akrilne) kiseline u destilovanoj vodi i fiziološkom rastvoru",
volume = "72",
number = "11",
pages = "1139-1153",
doi = "10.2298/JSC0711139K"
}

Kostić, A. Ž., Adnađević, B., Popović, A. R.,& Jovanovic, J.. (2007). Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution. in Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 72(11), 1139-1153.
https://doi.org/10.2298/JSC0711139K

Kostić AŽ, Adnađević B, Popović AR, Jovanovic J. Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution. in Journal of the Serbian Chemical Society. 2007;72(11):1139-1153.
doi:10.2298/JSC0711139K .

Kostić, Aleksandar Ž., Adnađević, Borivoj, Popović, Aleksandar R., Jovanovic, Jelena, "Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution" in Journal of the Serbian Chemical Society, 72, no. 11 (2007):1139-1153,
https://doi.org/10.2298/JSC0711139K . .

TY  - JOUR
AU  - Kostić, Aleksandar Ž.
AU  - Jovanovic, J.
AU  - Adnađević, Borivoj
AU  - Popović, Aleksandar R.
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/921
AB  - Isothermal kinetics of copper (ion) binding to poly(acrylic acid) (PAA) hydrogel at 20, 25, 35 and 45 C was investigated. Isothermal conversions and kinetic curves of Cu2+ binding to the PAA hydrogel were determined. It was found that the well-known kinetic models of Peppas cannot be applied to describing the entire process of Cu2+ binding. The new method for the determination of the kinetic model of the Cu2+ binding process, as well as the activation energy density distribution functions of PAA hydrogel interaction with Cu2+, were established. It was found that Cu2+ diffusion to the active centers (with E-a = 9 kJ/mol) has a dominant influence on the kinetics of the process at temperatures T  gt = 30 degrees C, but at T  gt = 30 degrees C and for the degree of bound Cu2+ alpha  gt = 0.2, the interaction of Cu2+ from the adsorption center with E-a = 26 kJ/mol is dominant.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - Russian Journal of Physical Chemistry A
T1  - Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel
VL  - 81
IS  - 9
SP  - 1374
EP  - 1379
DO  - 10.1134/S0036024407090051
ER  - 

@article{
author = "Kostić, Aleksandar Ž. and Jovanovic, J. and Adnađević, Borivoj and Popović, Aleksandar R.",
year = "2007",
abstract = "Isothermal kinetics of copper (ion) binding to poly(acrylic acid) (PAA) hydrogel at 20, 25, 35 and 45 C was investigated. Isothermal conversions and kinetic curves of Cu2+ binding to the PAA hydrogel were determined. It was found that the well-known kinetic models of Peppas cannot be applied to describing the entire process of Cu2+ binding. The new method for the determination of the kinetic model of the Cu2+ binding process, as well as the activation energy density distribution functions of PAA hydrogel interaction with Cu2+, were established. It was found that Cu2+ diffusion to the active centers (with E-a = 9 kJ/mol) has a dominant influence on the kinetics of the process at temperatures T  gt = 30 degrees C, but at T  gt = 30 degrees C and for the degree of bound Cu2+ alpha  gt = 0.2, the interaction of Cu2+ from the adsorption center with E-a = 26 kJ/mol is dominant.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel",
volume = "81",
number = "9",
pages = "1374-1379",
doi = "10.1134/S0036024407090051"
}

Kostić, A. Ž., Jovanovic, J., Adnađević, B.,& Popović, A. R.. (2007). Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 81(9), 1374-1379.
https://doi.org/10.1134/S0036024407090051

Kostić AŽ, Jovanovic J, Adnađević B, Popović AR. Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel. in Russian Journal of Physical Chemistry A. 2007;81(9):1374-1379.
doi:10.1134/S0036024407090051 .

Kostić, Aleksandar Ž., Jovanovic, J., Adnađević, Borivoj, Popović, Aleksandar R., "Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel" in Russian Journal of Physical Chemistry A, 81, no. 9 (2007):1374-1379,
https://doi.org/10.1134/S0036024407090051 . .