Study on Carboxymethyl-chitin Production and its Application in Food Industry

บทคัดย่อ

On the procuction of carboxymethyl-chitin (CM-chitin), alkali chitin was prepared by mercerized chitin in 50, 55, 60 and 65% (W/V) NaOH solution. After keeping over night at 0 and -20°C, the resulted frozen alkali-chitin was alkylated with the addition of monochloroacetic acid in 2-propanol. CM-chitin obtained from the various conditions showed different properties. The degree of carboxymethyl group substitution at C₆ studied by IR and ¹³C NMR ranged from 0.38 to 0.7 depending on the concentration of sodium hydroxide. CM-chitin could be effectively used as an emulsifier, thichener, stabilizer in salad dredding and bodying agent in sweetened soft drinks.