机械活化木薯淀粉羧甲基化产物的结构表征

doi:10.7506/spkx1002-6630-201013018

食品科学 ›› 2010, Vol. 31 ›› Issue (13): 74-77.doi: 10.7506/spkx1002-6630-201013018

机械活化木薯淀粉羧甲基化产物的结构表征

谭义秋

广西民族师范学院化学与生物工程系

收稿日期:2009-11-26 修回日期:2010-05-21 出版日期:2010-07-01 发布日期:2010-12-29
通讯作者: 谭义秋 E-mail:tyq530202@163.com
基金资助:
广西省教育厅科研基金资助项目(200807 MS 111)

Structural Characterization of Carboxymethylated Cassava Starch Prepared Based on Mechanical Activation

TAN Yi-qiu

Department of Chemistry and Biology Engineering, Guangxi Normal University for Nationalities, Chongzuo 532200, China

Received:2009-11-26 Revised:2010-05-21 Online:2010-07-01 Published:2010-12-29
Contact: TAN Yi-qiu E-mail:tyq530202@163.com

摘要/Abstract

摘要：

采用搅拌球磨机对木薯淀粉进行机械活化，以活化60min 的木薯淀粉为原料，氢氧化钠为催化剂，一氯乙酸为醚化剂干法合成羧甲基淀粉，利用红外光谱、扫描电子显微镜、X 射线衍射等手段对产物的结构进行表征分析，并与原木薯淀粉合成的羧甲基淀粉进行比较。结果表明：机械活化对木薯羧甲基淀粉的结构有显著影响；原木薯淀粉的羧甲基化反应受表面控制，主要发生在无定形区，部分发生在结晶区，产物含有结晶结构并保留着淀粉的颗粒形态；活化淀粉的羧甲基化反应在淀粉团粒表面及内部均匀进行，产物呈无规则黏连形态，是无定形的聚集状态结构。

关键词: 机械活化, 木薯羧甲基淀粉, 结构表征

Abstract:

Cassava starch was mechanically activated for 60 min using a stirring type ball mill in order to provide activated cassava starch for preparing carboxymethylated starch using NaOH as a catalyst and ClCH2COOH as an etherification agent. The structure of carboxymethylated cassava starch was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). After mechanical activation, the structure of cassava starch had no obvious changes. Carboxymethylation reaction could be observed on the surface and interior of activated cassava starch. Its carboxymethylated counterpart showed an irregular adhesive form and an aggregative state and maintained both the precarboxymethylation crystal structure and morphological features of starch granules. In contrast, carboxymethylation controlled on the surface area was mainly completed in the amorphous zone and partly in the crystalline area of inactivated cassava starch.

Key words: mechanical activation, carboxymethylated cassava starch, structural characterization

中图分类号:

TS236.9

谭义秋. 机械活化木薯淀粉羧甲基化产物的结构表征[J]. 食品科学, 2010, 31(13): 74-77.

TAN Yi-qiu. Structural Characterization of Carboxymethylated Cassava Starch Prepared Based on Mechanical Activation[J]. FOOD SCIENCE, 2010, 31(13): 74-77.

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机械活化木薯淀粉羧甲基化产物的结构表征

Structural Characterization of Carboxymethylated Cassava Starch Prepared Based on Mechanical Activation

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