华南理工大学学报(自然科学版) ›› 2017, Vol. 45 ›› Issue (3): 111-116.doi: 10.3969/j.issn.1000-565X.2017.03.016

• 食品科学与技术 • 上一篇    下一篇

高取代度羧甲基淀粉的理化性质

张本山1 郭陈锋1 李为民1 汪建平2   

  1. 1. 华南理工大学 食品科学与工程学院,广东 广州 510640;2. 广州市高士实业有限公司工程技术中心,广东 广州 510450
  • 收稿日期:2016-05-25 修回日期:2016-11-24 出版日期:2017-03-25 发布日期:2017-02-02
  • 通信作者: 张本山( 1964-) ,男,博士,主要从事功能碳水化合物化学材料理论与技术研究. E-mail:lczhang@scut.edu.cn
  • 作者简介:张本山( 1964-) ,男,博士,主要从事功能碳水化合物化学材料理论与技术研究.
  • 基金资助:
    国家自然科学基金联合基金资助项目( U1203181) ; 广州市对外科技合作项目( 201508030020)

Physicochemical Properties of Highly-Substituted Carboxymethyl Starch

ZHANG Ben-shan1 GUO Chen-feng1 LI Wei-min1 WANG Jian-ping2   

  1. 1.School of Food Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Technical Center,Glorystar Chemicals ( Guangzhou) Co.,Ltd.,Guangzhou 510450,Guangdong,China
  • Received:2016-05-25 Revised:2016-11-24 Online:2017-03-25 Published:2017-02-02
  • Contact: 张本山( 1964-) ,男,博士,主要从事功能碳水化合物化学材料理论与技术研究. E-mail:lczhang@scut.edu.cn
  • About author:张本山( 1964-) ,男,博士,主要从事功能碳水化合物化学材料理论与技术研究.
  • Supported by:
    Supported by the Joint Funds of National Natural Science Foundation of China( U1203181)

摘要: 以原玉米淀粉为原料,在醇相中制备了高取代度羧甲基淀粉,采用红外光谱仪、扫描电镜、X 射线衍射仪、DV-I Prime 旋转黏度仪和紫外分光光度计对其理化性质进行了测定和分析,并与原玉米淀粉进行比较. 结果表明: 原玉米淀粉分子上成功接入了羧甲基官能团,而且取代度大于1. 0; 羧甲基淀粉颗粒发生膨胀,裂纹明显,表面粗糙,颗粒中心出现大的爆裂孔; 羧甲基淀粉的结晶结构被破坏,甚至结晶区消失; 羧甲基淀粉透明度和冻融稳定性远远优于原玉米淀粉,而且取代度越高透光率和冻融稳定性越好.

关键词: 羧甲基淀粉, 取代度, 理化性质

Abstract:

Firstly,carboxymethyl starches ( CMS) with high degree of substitution ( DS) were prepared from native corn starch via a reaction in aqueous alcohol.Secondly,the physicochemical properties of the prepared starches were measured and analyzed by means of FT-IR,SEM,XRD,DV-I Prime rotary viscometry and ultraviolet spectrophotometry,which were then compared with those of native corn starch.The results indicate that ( 1) after the reaction,native corn starch is successfully carboxymethylated with a DS of more than 1. 0,and starch granules are rough,swollen and cracked,with huge burst holes in the their center; ( 2) the crystalline sharp peaks of CMS damage and even disappear after the carboxymethylation; and ( 3) in comparison with native corn starch,CMS possesses much better transparency and freeze-thaw stability that are both positively related to DS.

Key words: carboxymethyl starch, degree of substitution, physicochemical property

中图分类号: