【摘要】 以明胶-阿拉伯树胶为壁材,采用复合凝聚法制备了双相核材料的纳米胶囊,其内包覆改性TiO2/四氯乙烯双相分散体系。讨论了制备过程中,各参数对纳米胶囊粒径的影响,并采用扫描电镜及透射电镜观察了纳米胶囊的粒径分布及形貌。结果表明,制备的纳米胶囊囊壁光滑、均匀,具有窄的粒径分布。双相分散体系被包覆于纳米胶囊内,且TiO2纳米颗粒粒径约为50 nm。所制备的纳米胶囊平均粒径约为0.96μm,囊壁厚度约为18 nm。更多还原

【Abstract】 In this study,gelatin-gum arabic nanocapsules containing diphasic core materials were prepared by complex coacervation,during the process of which the TiO2 nanoparticles modified with stearic acid and dispersed in tetrachloroethylene(TCE) were encapsulated.The effects of the various microencapsulation parameters were also experimentally investigated.The obtained materials were characterized by means of scan electron microscopy(SEM) and transmission electron microscopy(TEM).The results indicate that the surface of the nanocapsules was smooth and clear.The diphasic dispersion was encapsulated in nanocapsules and the diameter of TiO2 nanoparticles was ~50 nm.The resulting nanocapsules have an average diameter of 0.96 μm with a wall thickness of ~18 nm.更多还原