以玉米淀粉为原料,将糊化后的淀粉溶液与戊二醛交联,采用溶剂置换制得高白度、表面带有微孔结构、并具有一定抗水性能的淀粉微孔发泡材料(starch microcellular foam,SMCF).研究了交联反应及溶剂置换各因素对SMCF白度、湿含量及微孔形成的影响,确定最优工艺:交联剂戊二醛的用量为10g戊二醛/100g淀粉,交联反应时间为2h,交联反应温度为50℃,溶剂置换方式为搅拌式,溶剂置换次数为3次.此外,红外光谱(FT-IR)分析表明经戊二醛交联的SMCF分子中甲基和亚甲基数量增加,羟基数量减少,证实了交联反应的发生,属于醚化反应;热重(TGA)分析研究了SMCF的热降解行为,交联后的SMCF分解温度在330℃左右,热稳定性优于未交联淀粉.
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