Kinetics of Interaction Between Fullerol C_(60)(OH)_(24) and Polyacrylic Hydrogels

摘要

In this paper kinetics of binding of fuilerol to polyacrylic hydrogel at different temperatures, 298, 308 and 318 K, has been investigated. Time dependences of specific capacity of fuilerol binding to hydrogel at defined temperatures are determined. Kinetic curves of specific binding capacity of fuilerol for hydrogel are described by equations: x = (k_1x_(max)~2 t)/(1+k_1x_(max)t) and x=k_2t~n. Rate constants k_1 and k_2 of the specific fuilerol binding capacity at various temperatures are determined. Based on changes in constants k_1 and k_2 with temperature, kinetic parameters of the investigated process are calculated. Also, due to a great difference in values of kinetic parameters k_1 and k_2 obtained by varying the temperature, kinetic parameters are determined by using Friedman's iso-conversion method. The values of kinetic parameters based on temperature changes in k_2 correspond to the values of kinetic parameters for α ≈ 0.9, while the values of kinetic parameters calculated according to the temperature change in k_1, correspond to the E_a values. According to the obtained results it is concluded that the investigated process is controlled by diffusion.