Journal of the Korean Industrial and Engineering Chemistry, Vol.3, No.1, 156-171, March, 1992
N-Acylchitosan Porous Bead들의 제조 및 금속이온 흡착특성에 관한 연구
A Study on the Synthesis of N-Acylchitosan Porous Beads and Their Metal Ion Adsorption Characteristics
Chitin was isolated from crab shell. Chitosan, which was prepared by the deacetylation of chitin, was acylated to obtain N-acetyl(regenerated chitin), N-propionyl, N-butyryl, N-hexanoyl, N-decanoyl and N-maleated chitosans and their metal ion adsorption characteristics of N-acylchitosans were investigated. In order to enhance the adsorptivity, their porous beads were prepared and their adsorptivity with respect to the porosity and the adsorptivities for metal ions(Cu2+, Ni2+, Co2+, Mn2+, Ag+)were investigated. Their metal ion adsorptivities were remarkably imporved compared to those of chitin. As the larger acyl groups were introduced, adsorptivity increased, but that of N-decanoyl chitosan showed some decrease because of steric hindrance of the bulky if-decanoyl group. N-Maleated chitosan containing carboxyl group showed highly improved adsorptivity, and N-acylchitosans showed the good selective adsorption in the mixed metal ions(Cu2+, Ni2+, Co2+, Mn2+ and Ag+). They also showed excellent adsorption characteristics as chelating polymers.
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