关键词: 竹笋壳, 羧甲基纤维素, 纤维素, 取代度

Abstract: In this study carboxymethyl cellulose was successfully synthesized from bamboo shoot shell wastes using four-times alkalization method. The raw material and products were characterized by FTIR，XRD，TGA and SEM. The results showed that the optimal preparation conditions were pretreated cellulose 5 g，sodium hydroxide 5 g，chloroacetic acid 6 g，85% ethanol as solvent，first basification temperature and time were 30 ℃ and 90 min with 80% of total sodium hydroxide，the remaining 20% was averagely divided into three parts to add during the etherification process，final etherification temperature and total etherification time were 70 ℃ and three hours. Under the optimized reaction conditions，the substituting degree of carboxymethyl cellulose obtained reached 0.9341 and the viscosity was 35 mPa?s.

Key words: bamboo shoot shell, carboxymethyl cellulose, cellulose, degree of substitution