摘要
本文研究了交联一酯化复合变性淀粉——乙酰化二淀粉磷酸酯的结构和物理化学特性。结果表明:由于乙酰基取代了淀粉分子的部分羟基而使淀粉与碘的结合能力下降,展现为直链淀粉含量降低,淀粉的溶解度和膨润力增加;淀粉糊的透明度和冻融稳定性有所改善,交联反应还提高了淀粉的耐热、耐酸稳定性。
In this paper, the strctures and physical-chemical properties of acetylated distarch phosphate(ADSP), Which was compound-modified starch with cross-linking and esterification, were reported. The results showed: the capacity that starch molecules absorbed iodines were decreased because some hydroxy groups of starch molecules were substituted by acetyl groups. This was found by amylose content of ADSP being decreased. Furthermore, the solubility and swellng power of ADSP were increased and the paste clarity and low-temperature stability of ADSP were improved. In addition, the thermostability and acidstability of ADSP were improved by cross-linking.
关键词
玉米淀粉
ADSP
Corn starch
Acetylated distarch phosphate
