Properties and in vitro digestibility of starch encapsulated in chitosan-sodium phytate capsules
Properties and in vitro digestibility of starch encapsulated in chitosan-sodium phytate capsules
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DOI：
10.1016/j.foodhyd.2022.108127
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发表时间：
2022-09-14
影响因子：
10.7
通讯作者：
Sun, Qingjie
中科院分区：
文献类型：
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作者：
Qin, Kaili;Sun, Daiyong;Sun, Qingjie
淀粉被人体摄入后，迅速分解为葡萄糖，引起血糖升高，高血糖会导致一系列健康并发症。本研究的目的是通过将淀粉包裹在壳聚糖-植酸钠胶囊中来延缓淀粉的消化。通过将淀粉和壳聚糖的混合溶液滴入植酸钠中形成胶囊，在淀粉颗粒表面形成壳聚糖-植酸钠膜，从而通过阻断淀粉酶而抑制淀粉的消化。在不同温度（55-95 ℃）下，淀粉/壳聚糖胶囊的溶胀度比原淀粉低100-200%。扫描电子显微镜（SEM）图像显示，胶囊由壳聚糖-植酸钠膜覆盖的淀粉颗粒组成。壳聚糖与豌豆淀粉比例为1：10的淀粉/壳聚糖胶囊的慢消化淀粉含量为27.72%，显著高于豌豆淀粉的7.97%。此外，具有壳聚糖与豌豆淀粉的1：5的比例的淀粉/壳聚糖胶囊的抗性淀粉含量为15.18%，这显著高于天然豌豆淀粉的抗性淀粉含量（6.22%）。这些研究成果在延缓淀粉消化方面具有重要意义，适用于糖尿病、心血管疾病、肥胖等慢性病患者。
After starch is ingested by the human body, it is rapidly broken down into glucose, causing an increase in blood glucose, and high blood glucose can lead to a series of health complications. The aim of this study was to delay the digestion of starch by encapsulating it in chitosan-sodium phytate capsules. A chitosan-sodium phytate film was formed on the surface of starch granules by dropping a mixed solution of starch and chitosan into sodium phytate to form capsules, thereby inhibiting the digestion of starch by blocking amylase. At different tempera-tures (55-95 degrees C), the swelling degree of starch/chitosan capsules was 100-200% lower than that of native starch. Scanning electron microscope (SEM) images showed that the capsules consisted of starch granules covered by a chitosan-sodium phytate film. The slowly digestible starch content of starch/chitosan capsules with a chitosan-to-pea starch ratio of 1:10 was 27.72%, which was significantly higher than that of native pea starch, which was 7.97%. Further, the resistant starch content of starch/chitosan capsules with a chitosan-to-pea starch ratio of 1:5 was 15.18%, which was significantly higher than that of native pea starch, which was 6.22%. These research results are of great significance in delaying starch digestion and are suitable for patients with chronic diseases such as diabetes, cardiovascular disease, and obesity.