通过两相真空高压均质机制备了丝素蛋白包埋的玉米油乳液.pH＝7时,对不同丝素蛋白浓度(0.2%～3%(质量分数))包埋的玉米油(10%(质量分数))乳液表面电位、粒径大小及表面形貌进行了表征,确定了最佳丝素蛋白用量为1%(质量分数),在此最佳用量下,乳液表面电荷为-28.1mV,粒径d43为5.18μm.此外,研究了pH＝2～8对乳液体系物理稳定性的影响,环境pH＝2、3、6、7、8时,乳液十分稳定;pH＝4、5时,乳液不稳定,这是由于该pH值靠近丝素蛋白等电点,表面电荷趋于0mV,乳液液滴间缺乏静电排斥而形成凝集.结果表明,采用两相高压均质机可制备丝素蛋白包埋的玉米油乳液.
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