Novel method for preparation of β-cyclodextrin/grafted chitosan and it's application
2006
El-Tahlawy, K. | Gaffar, M.A. | El-Rafie, S.
A novel technique for preparation of β-cyclodextrin-grafted chitosan was carried out by reacting β-cyclodextrin citrate (β-CD citrate) with chitosan. β-Cyclodextrin citrate was synthesis by esterifying β-cyclodextrin (β-CD) with citric acid (CA) in presence or absence of sodium hypophosphite as a catalyst in a semidry process. Different factors affecting preparation of β-CD citrates were studied to obtain β-CD citrate with high carboxyl content, such factors include reaction temperature, citric acid concentration, material to liquor ratio and duration. β-Cyclodextrin/grafted chitosan was prepared by coupling β-CD citrate with chitosan dissolved in different formic acid solutions having different concentrations. The reacting ingredients were subjected to various reaction conditions to attain the optimum condition. β-Cyclodextrin/grafted chitosan were evaluated by measuring the nitrogen content of both chitosan and grafted chitosan. Chitosan and β-cyclodextrin/grafted chitosan, having different molecular weights, were evaluated as antimicrobial agents for different microorganisms such as, Bacillus Megaterium, Pseudomonas Fragi, Bacillus Cereus Staphylococcus Aureus, Escherichia Ecoli and Aeromonas hydra.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил National Agricultural Library