Kinetics of the initial stage of gelation in chitosan solutions containing glutaric aldehyde : Viscometric study
作者： E. A. Merkovich , M.-L. Carruette , V. G. Babak , G. A. Vikhoreva , L. S. Gal'braikh
关键词: Nuclear chemistry 、 Sorption 、 Ionic strength 、 Chitosan 、 Concentration effect 、 Aqueous solution 、 Chromatography 、 Aldehyde 、 Chemistry 、 Viscosity 、 Kinetics
摘要: The effects of glutaric aldehyde concentration C GA(in the range from 0.07 to 0.2 wt %) and temperature T(from 20 65°C) on kinetics an increase in effective viscosity ηeffof aqueous solutions chitosans (C CH= 2.4 %, pH 3.6, ionic strength I= 0.05) with molecular masses equal 33 × 104and 55 degrees substitution at N-acetyl amino groups 0.08 0.90, respectively were studied. kinetic curves ηeff (t ) exhibited induction periods a relatively slight chitosan–glutaric mixed time followed by drastic viscosity. former correspond formation gel clusters; latter periods, gelation over whole volume solution. Optimal ranges parameters C GAand Twere determined for preparation spherical particles slightly cross-linked chitosan, which are used sorption heavy metals low-concentrated solutions.
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