为分析不同用量氧化剂(次氯酸钠)对氧化淀粉结晶度的变化,以及氧化剂次氯酸钠利用率,分别对原淀粉和氧化剂加入量为5、7.5、10、12.5、15g的氧化淀粉进行羧基含量的测定和X射线衍射图谱分析.得知氧化剂次氯酸钠的利用率为0.02％.氧化淀粉的结晶度随着氧化剂次氯酸钠用量的增加而减小,说明次氯酸钠破坏了淀粉结晶结构.%In order to study the effects of sodium hypochlorite (oxidant for starch) consumption on the crystallinity of oxidized starch as well as the conversion ratio of sodium hypochlorite, five types of oxidized starch were prepared with the oxidizer consumptions of 5,7.5, 10,12.5 and 15 g, and then the determination of carboxyl content and X-ray diffraction analysis were performed on these oxidized starch and the original one. In was concluded that the conversion of oxidant sodium hypochlorite was 0.02% and the degree of crystallinity of oxidized starch decreased with the rise of oxidant consumption, which could demonstrate that sodium hypochlorite definitely destroyed the crystalline structure of starch.
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