| 相转移催化合成羧甲基-羟乙基淀粉及工艺优化 |
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| 引用本文： | 张光旭,胡张雁,尤燕青,方园.相转移催化合成羧甲基-羟乙基淀粉及工艺优化[J].中国粮油学报,2011,26(12):34-38. |
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| 作者姓名： | 张光旭 胡张雁 尤燕青 方园 |
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| 作者单位： | 武汉理工大学化学工程学院,武汉,430070 |
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| 摘 要： | 羧甲基淀粉和羟乙基淀粉作为两种重要的变性淀粉,由于其合成条件苛刻和稳定性差等缺点限制了其应用.以甲醇为溶剂,筛选出四正丁基溴化铵(TBAB)作为相转移催化剂(PTC)对淀粉进行羟乙基化,合成了高取代度的羟乙基淀粉,并采用氯乙酸对其进行醚化,合成了羧甲基-羟乙基淀粉,既降低了传统合成方法的危险性,又克服了羧甲基淀粉的不稳定性.通过单因素分析对合成工艺进行了优化,优化条件为:淀粉25 g,催化剂0.75 g,2-氯乙醇10.0 g,NaOH 8.0 g,氯乙酸10.5 g,溶剂含水量为9 mL,羟乙基化反应时间为6h.试验证明,相转移催化法制得的产品取代度高,稳定性好.
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| 关 键 词： | 羧甲基-羟乙基淀粉 羟乙基化 相转移催化 取代度 |
Synthetization of Carboxymethyl-hydroxyethyl Starch by Phase Transfer Catalysis and its Technical Optimization |
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| Zhang Guangxu
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Hu Zhangyan
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You Yanqing
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Fang Yuan.Synthetization of Carboxymethyl-hydroxyethyl Starch by Phase Transfer Catalysis and its Technical Optimization[J].Journal of the Chinese Cereals and Oils Association,2011,26(12):34-38. |
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| Authors: | Zhang Guangxu Hu Zhangyan You Yanqing Fang Yuan |
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| Affiliation: | Zhang Guangxu Hu Zhangyan You Yanqing Fang Yuan(College of Chemical Engineering,Wuhan University of Technology,Wuhan 430070) |
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| Abstract: | As two important kinds of modified starch,carboxymethyl starch and hydroxyethyl starch are limited in their application because of their rigorous preparation process and unstability.In this paper,the hydroxyethyl starch was produced by a methanol solvent method.We selected tetrabutyl ammonium bromide(TBAB)as the phase transfer catalyzer(PTC)to synthesize hydroxyethyl starch with higher degree of substitution.Then,with chloroacetic acid as etherifying agent,we synthesized carboxymethyl-hydroxyethyl starch wi... |
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| Keywords: | carboxymethyl hydroxyethyl starch hydroxyethylation phase transfer catalyze degree of substitution |
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