| 醋酸酐制备低取代度木薯淀粉醋酸酯 |
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| 引用本文： | 林武滔,谢兆龙.醋酸酐制备低取代度木薯淀粉醋酸酯[J].宝鸡文理学院学报(自然科学版),2009,29(1). |
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| 作者姓名： | 林武滔 谢兆龙 |
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| 作者单位： | 三明学院,化学与生物工程系,福建,三明,365004;三明学院,化学与生物工程系,福建,三明,365004 |
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| 摘 要： | 目的 以木薯淀粉为原料,醋酸酐为乙酰化试剂,NaOH为催化剂,Na2SO4为膨胀抑制荆,制备了低取代度木薯淀粉醋酸酯.方法 考察反应温度、反应时间、木薯淀粉浓度等因素对醋酸酯淀粉乙酰基含量的影响.结果 通过均匀设计实验得到了合成低取代度醋酸酯淀粉的最佳工艺条件:反应温度21℃,反应时间120 min,木薯淀粉浓度45%,Na2SO4用量2%,醋酸酐用量6%(以淀粉干基质量计),得到的产物乙酰基含量1.68%,取代度(DS)O.064 3.结论 控制适当的反应条件,产品的凝沉性、透明度和粘度等理化性质有了显著的提高.
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| 关 键 词： | 木薯淀粉 醋酸酯 均匀设计 |
Preparation for cassava starch acetate with low degree of substitution by acetic anhydride |
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| LIN Wu-tao,XIE Zhao-long.Preparation for cassava starch acetate with low degree of substitution by acetic anhydride[J].Journal of Baoji College of Arts and Science(Natural Science Edition),2009,29(1). |
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| Authors: | LIN Wu-tao XIE Zhao-long |
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| Institution: | Department of Chemistry and Biological Engineering;Sanming College;Sanming 365004;Fujian;China |
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| Abstract: | Aim To prepare lower degree of substituted starch acetate with cassava starch as material,acetic anhydride as acetylation reagent,sodium hydroxide as catalyst and sodium sulfate as gelatinization inhibiter.Methods The effects of reaction factors such as reaction temperature,reaction time and the concentration of cassava starch on acetyl content of cassava acetate starch were studied.Results The optimum conditions for lower substituted synthetic acetate starch,which was obtained by uniform experimental desig... |
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| Keywords: | cassava starch acetate uniform design |
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