| 利用玉米秸秆制备羧甲基纤维素 |
| |
| 引用本文： | 谭凤芝,丛日昕,李沅,葛秀.利用玉米秸秆制备羧甲基纤维素[J].大连工业大学学报,2011,30(2):137-140. |
| |
| 作者姓名： | 谭凤芝 丛日昕 李沅 葛秀 |
| |
| 作者单位： | 大连工业大学,化工与材料学院,辽宁,大连,116034 |
| |
| 基金项目： | 辽宁省教育厅2010年度高等学校科研资助项目 |
| |
| 摘 要： | 以玉米秸秆为原料,预处理后原料中纤维素质量分数由39%提高至81%,探讨了物料配比、醚化与碱化反应温度及时间等因素对产品取代度和黏度影响。实验结果表明,最佳反应条件为m(纤维素)∶m(NaOH)∶m(ClCH2COOH)=1∶1∶1,以异丙醇为溶剂,采用二次加碱法的工艺,两次加碱的质量比为2∶1,碱化温度30℃、时间60 min,醚化温度65℃、时间120 min。按最佳条件反应制得的产品取代度可达1.34,25℃下2%水溶液黏度可达690 mPa.s,并通过红外谱图验证了产品的结构。
|
| 关 键 词： | 羧甲基纤维素 玉米秸秆 取代度 黏度 |
Preparation of carboxymethyl cellulose from corn straw |
| |
| TAN Feng-zhi,CONG Ri-xin,LI Yuan,GE Xiu.Preparation of carboxymethyl cellulose from corn straw[J].Journal of Dalian Dalian Polytechnic University,2011,30(2):137-140. |
| |
| Authors: | TAN Feng-zhi CONG Ri-xin LI Yuan GE Xiu |
| |
| Affiliation: | School of Chemistry Engineering and Material,Dalian Polytechnic University,Dalian 116034,China |
| |
| Abstract: | Alkali pretreatment of the corn straw increased the content of cellulose from 39% to 81%.The influence of the material ratio,the temperature of etherification and alkalization and the reaction time were researched.The result indicate that the optimized conditions are as follow: m(cellulose)∶m(NaOH)∶m(ClCH2COOH) =1∶1∶1,use the method of alkali adding by two times under the condition of the ratio of alkali is 2∶1,alkalization reaction temperature is 30 ℃ and reaction time is 60 min,etherification reaction temperature is 65 ℃ and reaction time is 120 min.Results show that the degree of substitution is 1.34 under the best condition,the viscosity is 690 mPa·s.The struture of the product is verified by IR. |
| |
| Keywords: | carboxymethyl cellulose corn stalk degree of substitution viscosity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
