化工进展

• 材料科学与技术 • 上一篇    下一篇

毛竹笋壳制备羧甲基纤维素

贺 杨,吴淑茗,卢思荣   

  1. 福州大学化学化工学院,福建 福州 350108
  • 出版日期:2013-10-05 发布日期:2013-10-14

Research on the preparation of carboxymethyl cellulose from bamboo shoot shell

HE Yang,WU Shuming,LU Sirong   

  1. College of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou 350108,Fujian,China
  • Online:2013-10-05 Published:2013-10-14

摘要: 以废弃毛竹笋壳为原料,经过4次加碱法制备出了羧甲基纤维素,并通过FTIR、XRD、TGA、SEM手段对原料与产品进行了表征。实验结果表明,制备羧甲基纤维素的最佳工艺条件为精制竹笋壳5 g,氢氧化钠5 g,氯乙酸6 g,85%乙醇溶液为溶剂,第1次碱化温度和时间分别为30 ℃和90 min,加入氢氧化钠总质量的80%,后3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3 h。在此工艺条件下,所得到的羧甲基纤维素的取代度为0.9341,黏度为35 mPa?s。

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