通过交联沉淀法制备了淀粉纳米粒子,并对其进行表面修饰,将苄基取代淀粉葡萄糖单元上的羟基,经FT-IR、1HNMR、XRD及SEM等对其结构与形态进行表征,得到取代度(DS)约为0.05、且具有一定疏水性的苄基淀粉微细颗粒.纳米淀粉和苄基淀粉微细颗粒的结晶结构不同于原淀粉,结晶度明显降低.它们的形态呈球形,粒径分别为50 nm～100 nm和50 nm～500 nm.所制备的纳米淀粉及苄基淀粉微细颗粒对聚合物基体具有增强、增韧的功能,有望在橡胶等聚合物基体中应用,且苄基淀粉微细颗粒具有双亲性结构,可作为高分子表面活性剂应用.
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