华南理工大学学报(自然科学版) ›› 2010, Vol. 38 ›› Issue (2): 32-38.doi: 10.3969/j.issn.1000-565X.2010.02.007

• 化学化工 • 上一篇    下一篇

羧甲基淀粉糊液透明度的影响因素及其性能研究

钟振声 孙昂   

  1. 华南理工大学 化学与化工学院, 广东 广州 510640
  • 收稿日期:2009-04-30 修回日期:2009-07-22 出版日期:2010-02-25 发布日期:2010-02-25
  • 通信作者: 钟振声(1955-),男,副教授,主要从事有机精细化学品的合成、提取和分析表征研究. E-mail:chszhong@seut.edu.cn
  • 作者简介:钟振声(1955-),男,副教授,主要从事有机精细化学品的合成、提取和分析表征研究.
  • 基金资助:

    广东省国际科技合作计划项目(B15B2071080)

Performance of Carboxymethyl Starch Paste and Factors Affecting Paste Transparency

Zhong Zhen-sheng  Sun Ang   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-04-30 Revised:2009-07-22 Online:2010-02-25 Published:2010-02-25
  • Contact: 钟振声(1955-),男,副教授,主要从事有机精细化学品的合成、提取和分析表征研究. E-mail:chszhong@seut.edu.cn
  • About author:钟振声(1955-),男,副教授,主要从事有机精细化学品的合成、提取和分析表征研究.
  • Supported by:

    广东省国际科技合作计划项目(B15B2071080)

摘要: 以马铃薯淀粉为原料,采用乙醇溶剂法合成了取代度为0.8901、糊透明度为89.2%的羧甲基淀粉(CMS).采用傅里叶变换红外光谱和环境扫描电镜对原淀粉和CMS的结构及形貌进行了表征,并探讨了合成因素对糊透明度的影响,发现:CMS糊透明度受取代度及醚化均匀度双重因素的影响.淀粉羧甲基化后糊透明度比原淀粉提高了53.8%,且糊的冻融稳定性、存放稳定性均优于原淀粉;CMS糊的透明度在碱性环境中变化不大,但随着酸性的增大而逐渐下降,且高取代度的CMS的耐酸性优于低取代度的CMS.文中还考察了不同食品添加剂对CMS糊透明度的影响,发现添加氯化钠、柠檬酸将导致CMS糊透明度降低,而葡萄糖、蔗糖的加入则会提高糊透明度

关键词: 羧甲基淀粉, 透明度, 取代度, 马铃薯淀粉

Abstract:

Carboxymethyl starch (CMS) with a degree of substitution (DS) of 0. 8901 and with a transparency of 89. 2% was synthesized from potato starch, with ethanol as the solvent. Then, the structure and morphology of potato starch and CMS were characterized by means of FT-IR and ESEM, and the effects of synthesis factors on the transparency of the CMS paste were analyzed. The results indicate that ( 1 ) the transparency of CMS paste is influenced by both the DS and the etherification uniformity; (2) after the carboxymethylation, the transparency of CMS paste increases by 53.8% and the freeze-thaw stability as well as the storage stability improves; (3) the transparency of CMS paste changes slightly in alkaline condition but gradually descends with the increase of acidity ; (4) as for the acid-resistant performance, the CMS with high DS is superior to that with low DS; and (5) as for the influences of food additives, sodium chloride and citric acid both reduce the paste transparency, while glucose and sucrose have an opposite effect.

Key words: carboxymethyl starch, starch paste, transparency, degree of substitution, potato starch