【摘要】 采用自由基界面聚合法,以聚乙二醇二丙烯酸酯(PEGDA 200)为壁材单体,过氧化二苯甲酰(BPO)为引发剂,紫外线吸收剂胡莫柳酯(HMS)为芯材,制备具有防晒功能的微胶囊。通过扫描电镜、激光粒度分析仪和傅里叶红外光谱分别对微胶囊的形貌、粒径分布和化学组成等进行表征。结果表明,在优化的反应条件下,制备的微胶囊为光滑的球形,包覆率达96.8%,平均粒径11.7μm。通过UV-2000S紫外线透过率分析仪测试其SPF值,证明微胶囊化的胡莫柳酯的防晒效果有明显提高。更多还原

【Abstract】 Sunscreen microcapsule was prepared by interfacial free-radical polymerization,with poly( ethylene glycol) diacrylate( PEGDA) as shell material and homosalate( HMS),a commonly known UV absorber,as core materials. Scanning electron microscope,laser particle size analyzer and fourier transform infrared spectroscopy( FTIR) were used to characterize the morphology,particle size distribution and chemical composition of as prepared microcapsules. Under the optimized condition the as prepared microcapsules had a spherical morphology and high encapsulation efficiency with a mean particle size of 11. 7 μm. Moreover,the SPF of the encapsulated HMS was confirmed by subjecting the microcapsulesbased creams to the UV transmittance analyzer UV-2000 S,and microcapsules showed obviously higher SPF compared to HMS.更多还原