福建毛竹制备羧甲基纤维素及其结构和性能表征

以福建毛竹为原料，经过四次加碱法制备羧甲基纤维素（CMC），并通过FTIR、XRD、TGA、SEM手段对原料与产品的结构和性能进行表征。结果表明，制备CMC的最佳工艺条件为：精制毛竹5g，氢氧化钠6g，氯乙酸6g，乙醇质量分数为85％，第一次碱化温度为30℃，时间为90min，氢氧化钠加入量为总质量的80％；后三次碱化是在醚化过程中平均加入剩余20％的碱，醚化最终温度为70℃，醚化总时间为3h。在此工艺条件下，所得到的CMC的取代度为0．9137，黏度为37mPa·s。

Synthesis and Characterization of Carboxymethyl Cellulose from Moso Bamboo Shoot Shell of Fujian

In this study carboxymethyl cellulose was successfully synthesized from moso bamboo of Fujian using four alkali-adding 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 6 g, chloroacetic acid 6 g, ethanol concentration 85%, first basification temperature and time were 30℃ and 90 rain with 80% of total sodium hydroxide, the remaining 20% was averagely divided into three parts to react 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 0.913 7 and the viscosity was 37 mPa·s.