SEM and Laser Method showed that the surface of modified MST-4 was smooth, and its dso increased slightly but the distribution was still narrow.

• SEM和激光粒度分析表明，改性后MST-4粒径稍有增加，但粒度分布仍较集中。 IR以及ESCA分析显示DL对淀粉的改性是一种化学键合，而且淀粉的小尺寸效应使这种化学键合程度提高。