期刊文献+

离子液体中无催化剂法合成淀粉醋酸酯的结构与性能 被引量:2

Properties of Synthetic Starch Acetates Synthesized in Ionic Liquid Without Catalyst
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摘要 以离子液体(ILs)氯化1-丁基-3-甲基咪唑(BMIMCL)为反应介质,无催化剂均相合成了高取代度的高直链玉米淀粉醋酸酯,利用红外光谱(FT-IR)、核磁共振(1H-NMR)、X射线衍射(XRD)和热重分析(TGA)对不同取代度(DS)的淀粉醋酸酯进行表征。结果表明,在BMIMCL中,无催化剂条件下,高直链玉米淀粉可与醋酸酐发生较好的均相反应,所合成的淀粉醋酸酯不存在淀粉原有的颗粒结构和结晶结构。并且,随着取代度的增加,XRD曲线中9°处的弥散峰增强,其热稳定性逐步提高。 High-amylose corn starch acetate with high degree of substitution (DS) was homogeneously synthesized using ionic liquid (ILs) 1-butyl-3-methylimidazolium (BMIMCL) as reaction medium without any catalyst. Starch acetates with different DS were characterized using FT-IR, 1H-NMR, XRD and TGA etc. The results indicate that an efficient homogeneous reaction occurres between starch and acetic anhydride in absence of catalyst in BMIMCL. Starch acetates lost intact particles structure and crystal structure that native starch has. With the increase of DS, the dispersion peak of 9+ is remarkably strengthened in X-ray diffraction patterns, and the sample also shows the better thermal stability.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2013年第3期1-4,共4页 Polymer Materials Science & Engineering
基金 国家自然科学基金资助项目(21004023) 广东省产学研结合项目(2009B090300272) 广东省科技攻关项目(2009B020312006) 华南理工大学中央高校基本科研业务费(2009ZM0124)资助
关键词 离子液体 淀粉醋酸酯 均相 催化剂 ionic liquid starch acetates homogeneous phase catalyst
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参考文献10

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二级参考文献11

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