通过环氧氯丙烷与淀粉纳米晶表面羟基活性基团反应,制备交联淀粉纳米晶,并经傅里叶变换红外光谱、核磁共振氢谱、X射线衍射及扫描电镜等对其结构与形态进行表征.交联淀粉纳米晶在化学结构上变化不大,由交联反应形成的化学键仍为醚键,与淀粉纳米晶本身的化学键类似.交联淀粉纳米晶的结晶结构也基本不变,得到的是分散比较稳定的50 nm左右的颗粒.而热性能分析表明,交联淀粉纳米晶的熔融温度略有提高.浸润性实验结果表明,交联淀粉纳米晶具有一定的疏水性,可在水、丙酮、二氯甲烷中均匀分散,但在乙酸乙酯中无法分散.交联淀粉纳米晶与聚丁二酸丁二醇酯复合材料的力学性能表明,当交联淀粉纳米晶含量为3％时,拉伸强度增加约11％,拉伸模量增加约13％,断裂伸长提高约10％,说明交联淀粉纳米晶可以增强、增韧聚丁二酸丁二醇酯.
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