摘要
以正十六烷为薰衣草香精的载体和封闭剂,聚甲基丙烯酸甲酯为壁材,采用乳液聚合法制备了温控缓释芳香微胶囊。利用扫描电子显微镜、激光粒度仪、紫外-可见分光光度计、热重分析仪及差示扫描量热仪对微胶囊的表观形貌、粒径及分布、包覆率、释香性能及热稳定性进行了测试表征。结果表明:当芯壁比为1∶1时,微胶囊呈球形或椭球型,表面光滑,平均粒径为300nm,粒径分布均匀,香精包覆率达85.7%;相较单纯的芳香微胶囊,以正十六烷为载体可对香精挥发起到进一步的抑制作用,所合成的芳香微胶囊具有明显的温控释香性能;微胶囊在15℃和35℃下放置90d仍分别有45%和27%的香精残留,显示出良好的缓释效果。
Thermostatic sustained release fragrant microcapsules were prepared with emulsion polymerization by using n hexadecane as the carrier and sealing agent of lavender essence and polymethyl methacrylate （PMMA） as wall material. The surface morphology, particle size and distribution, encapsulation rate, sustained release effect and thermal stability of the microcapsules were characterized by scanning electron microscope, laser particle size analyzer, UV spectrophotometer, thermogravimetric analyzer and differential scanning calorimeter. The research results show that the microcapsules have spherical or ellipsoidal shape with an average particle size of 300 nm and the particle size is distributed evenly under the following condition： the ratio of core material to shell material 1 ： 1. The related encapsulation rate reaches 85. 7℃ Compared with simple fragrant microcapsules, the volatilization of fragrance could be suppressed by n hexadecane as the carrier. The fragrant microcapsules prepared possess obvious thermostatic sustained release effect. The microcapsules still have 45% and 27% residual lavender fragrance under 15 ℃ and 35℃ conditions after 90 days, showing good sustained release effect.
作者
崔贞超
刘国金
周岚
姚菊明
张国庆
CUI Zhenchao;LIU Guojin;ZHOU Lan;YAO Juming;ZHANG Guoqing(Silk Institute,College of Materials and Textiles,Zhejiang Sci Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2018年第5期521-525,共5页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
科技部政府间国际科技创新合作重点专项(2016YFE0131400)
关键词
芳香微胶囊
温控缓释性
留香时间
载体
fragrant microcapsule
thermostatic sustained release property
fragrance holding time
carrier
