食品科学 ›› 2010, Vol. 31 ›› Issue (2): 22-24.doi: 10.7506/spkx1002-6630-201002005

• 工艺技术 • 上一篇    下一篇

辛烯基琥珀酸马铃薯淀粉酯的制备及其结构表征

虎玉森1,蒲陆梅1,张红利2,康继民2,韩舜愈2   

  1. 1.甘肃农业大学理学院 2.甘肃农业大学食品科学与工程学院
  • 收稿日期:2009-03-09 出版日期:2010-01-15 发布日期:2010-12-29
  • 通讯作者: 韩舜愈2 E-mail:huys@gsau.edu.cn
  • 基金资助:

    甘肃省科技厅攻关计划项目(GS052-A41-005-03)

Preparation and Structure Characterization of Octenyl Succinate Anhydride-modified Potato Starch

HU Yu-sen1,PU Lu-mei1,ZHANG Hong-li2,KANG Ji-min2,HAN Shun-yu2,*   

  1. 1. College of Science, Gansu Agricultural University, Lanzhou 730070, China;
    2. College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2009-03-09 Online:2010-01-15 Published:2010-12-29
  • Contact: HAN Shun-yu2,* E-mail:huys@gsau.edu.cn

摘要:

用吐温-20 作分散剂,用正交试验研究辛烯基琥珀酸马铃薯淀粉酯的生产条件,并采用红外光谱仪和扫描电镜对产品的结构和外观进行分析。结果表明:最佳生产条件为淀粉乳质量分数40%、温度30℃、pH7.5~8.0、酸酐质量分数5%;产品红外光谱图显示在1651cm-1 和573cm-1 处吸收峰加强,1558cm-1 和1730cm-1 处出现RCOO-和> C=O 的特征吸收峰,表明淀粉变性后引入了新基团;扫描电镜显示淀粉颗粒表面明显侵蚀,表面积增大。

关键词: 马铃薯淀粉, 辛烯基琥珀酸酐, 取代度, 酯化反应

Abstract:

Octenyl succinate anhydride (OSA)-modified potato starch was synthesized by base-catalyzed reaction of octenyl succinate anhydride with granular starch in aqueous suspension using Tween-20 as dispersing agent. An orthogonal array design involving 4 factors (starch concentration, OSA concentration, reaction temperature, pH value) at 3 levels was employed to optimize the reaction conditions. The structure of OSA potato starch was characterized with fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Optimum degree of substitution (DS) was obtained when the reaction was performed between 40% potato starch slurry and 5% OSA at 30 ℃, pH 7.5-8.0. FT-IR spectrum of OSA starch showed the intensified absorption peaks at 1651 cm-1 and 573 cm-1, and characteristic absorption peaks of RCOO- at 1558 cm-1 and >C=O at 1730 cm-1, which suggest the formation of ester. SEM image showed that OSA potato starch granular had rougher surface than native potato starch, and thus had higher specific surface area.

Key words: potato starch, octenyl succinate anhydride, degree of substitution, esterification reaction

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