氨基甲酰乙基淀粉合成中副反应的影响

摘要本文以木薯氧化淀粉为原料，合成了不同取代度（Ｄ．Ｓ）的氨基甲酰乙基淀粉，通过研究氢氧化钠浓度、反应温度、反应时间及丙烯酰胺用量对醚化产物中酰胺基取代度、羧基取代度及总醚化效率的影响，探讨了氨基甲酰乙基淀粉（ＣＥＳ）合成中的副反应。结果表明：氨基甲酰乙基化反应程度受上述因素制约。最佳醚化条件为：０．２ｍｏｌ／ｍｏｌ（淀粉），ｃ（ＮａＯＨ）＝０．１０ｍｏｌ／Ｌ，４０℃，反应４ｈ。在此条件下氨基甲酰乙基淀粉的相对水解度最小，且醚化效率最大，可达７２．６％。

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	程发
	张蕾
	张明
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关键词：木薯氧化淀粉氨基甲酰乙基化反应取代度副反应木薯氧化淀粉氨基甲酰乙基化反应取代度副反应

Abstract： Using the cassava oxidized starch has been synthesized carbamoylethyl starch(CES)with different degrees of substitution( D.S ).By analyzing the effect of the concentration of NaOH,reaction time,reaction termperature and the weight of acrylamide on the D.S (N). D.S (Na)of etherified products and the total rate of etherification,we studied the side reaction of synthesizing carbamoylethyl starch.Results show that the extent of reaction of strach with acrylamide is governed by aforementioned factors.Furthermore,the best etherification conditions are the weight of acrylamide[0 2mol/mol (starch)],the concentration of NaOH(0 1 mol/L),reaction temperature(40℃),reaction time (4h).When the side effcct on carbamoylethylation is the weakest,the total of rate of etherification reaches 72 6%.

Keywords： cassava oxidized starch carbamoylethylation the degrees of substitution side reaction

Received 1999-11-15; published 1999-11-15

引用本文:

程发,张蕾,张明,张镜吾.氨基甲酰乙基淀粉合成中副反应的影响[J]. 化学工业与工程, 1999,16(6): 325-329

Cheng Fa Zhang Lei Zhang Ming Zhang Jingwu .The Effect of Side Reaction on Synthesizing Carbamoyethyl Starch[J]. Chemcial Industry and Engineering, 1999,16(6): 325-329