纺织学报 ›› 2011, Vol. 32 ›› Issue (5): 71-73.

• 染整与化学品 • 上一篇    下一篇

60Co-γ射线及微波辐照双重作用下淀粉的结构表征

王晓广,吴海燕,汤月华,王霞   

  1. 武汉纺织大学;武汉中升化学品厂
  • 收稿日期:2010-04-15 修回日期:2010-12-16 出版日期:2011-05-15 发布日期:2011-05-15
  • 通讯作者: 王晓广

Characterization of starch by dual role of 60Co-γ ray and microwave irradiation

  • Received:2010-04-15 Revised:2010-12-16 Online:2011-05-15 Published:2011-05-15

摘要: 通过60Co-γ射线及微波双重辐照制备辐射变性淀粉,测辐射变性淀粉的糊化温度及溶解度,同玉米原淀粉和H2O2氧化淀粉相比,γ辐射、微波改性亦能提高淀粉的糊化温度和溶解度,降低粘度;采用丁醇沉降法分别测定其直链、支链淀粉含量,得出支链淀粉的降解率为30.9 %,表明淀粉经γ辐射、微波后以线性的直链淀粉为主体存在,能更好地溶于热水形成真溶液。

Abstract: Preparation of radiation modified starch by double irradiation of 60Co-γ ray and microwave. To test the gelatinization temperature and solubility of radiation modified starch, compared with the corn native starch and H2O2 oxidized starch, modification with γ radiation and microwave can also improve the gelatinization temperature and solubility of starch, and lowering the viscosity. Were determined the content of amylose and amylopectin with Butanol Sedimentation, the results show that, the degradation rate of amylopectin was 30.9 %. So the starch to exist as the main linear amylose after γ radiation and microwave, better able to dissolve in hot water for the formation of true solution.

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