摘要
以聚乙烯醇为壁材包覆烟草萃取液制备微胶囊,通过正交实验得到的最佳工艺条件为：w（聚乙烯醇）∶w（菜子油）∶w（芯材）∶w（水相）=3∶20∶4∶25,乳化时间20min,搅拌速度1 200r/min,复凝聚时间10min。实验所得的微胶囊成球形,粒径在30-200μm,包覆率在48%左右,微胶囊在30℃碱液中80h缓释40%-50%,延长了萃取液在重组烟叶的存在时间,减少萃取液挥发造成的浪费。
In the paper,tobacco extract microcapsule was firstly prepared by solvent evaporation method with polyvinyl alcohol cellulose as shell material.Orthogonal experiment results showed that the optimum processing conditions was：polyvinyl alcohol：vegetable oil：tobacco extract：aqueous phase=3：20：4：25, emulsification time at 20min,stirring at 1200r/m,complex coacervation time at 10min.Mircocapsules was globular,diameter 30-200μm,cover rate about 48%.In alkaline conditions with 30℃,microcapsules slow release 40%-50%in 80hours,which extended the time for the presence of the extract in restructuring tobacco and reduced the waste caused by the extract volatilization.
出处
《湖北工业大学学报》
2014年第2期117-120,共4页
Journal of Hubei University of Technology
关键词
聚乙烯醇
烟草萃取液
微胶囊
缓释
polyvinyl alcohol
tobacco extract
microcapsules
controlled release
