利用相分离工艺制备玉米醇溶蛋白(zein)纳米微球,微球粒径可控制在40 nm左右;经旋转蒸发制得zein溶胶体系,zein溶胶具有明显的丁达尔现象,静置数月不聚沉,Zeta电位法测得zein微球在pH值为4.0时分散性能最佳.以纳米zein微球为固相稳定剂制备O/W型Pickering乳液,考察了zein胶体加入量、油水体积比等因素对乳液稳定性的影响.实验结果表明,zein胶体加入量的质量分数控制为0.4％,高油水体积比将有利于Pickering乳液的长时间稳定.基于zein分子的两亲结构和界面组装特点,提出了zein微球稳定Pickering乳液的作用机制.
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