压热法结合反复冻融制备小麦抗性淀粉及其理化性质研究

Physicochemical Properties of Wheat Resistant Starch by Autoclave Method Combined with Repeated Freezing and Melting

摘要:

以小麦淀粉为原料，利用压热法制备抗性淀粉，再经过反复冻融，以期提高产品的抗性淀粉含量。对产品的颗粒形貌、碘吸收曲线、持水力、膨胀度、溶解度等理化性质进行了测定。结果表明，反复冻融次数为6次时得到的小麦抗性淀粉含量最高，为18.31%，经过反复冻融处理的小麦抗性淀粉，颗粒呈不规则形，且在碘吸收曲线中稍微偏向直链淀粉吸收峰，表明其可能含有较多的直链淀粉。与小麦原淀粉相比，经反复冻融处理的小麦抗性淀粉的持水力与膨胀度显著增加，而溶解度显著降低。

Abstract:

The autoclave method combined with repeated freezing and melting for preparation of wheat resistant starch was studied. And the physicochemical and structure properties of wheat resistant starch were investigated. The results showed that after freezing and melting treatment for 6 times, the content of wheat resistant starch reached the highest (18.31%). The water-holding ability, solubility and swelling capacity were influenced by the times of freezing and melting treatment.