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论文类型：期刊论文

发表时间：2012-07-13

发表刊物：Advanced Materials Research

收录刊物：EI、CPCI-S、Scopus

卷号：557-559

页面范围：483-488

ISSN号：9783037854570

关键字：Supercritical fluid; Impinging; fluidized bed; Microcapsule; Coating

摘要：The supercritical fluid impinging technology combined with fluidized bed (SFIT-FB) process is a novel technique to prepare microcapsules. The process was performed using ultra-fine glass beads as the core particle and paraffin the coating material. The influences of operation parameters, including the pressure and the temperature of mixing vessel and the impinging distance on the microcapsule morphology, size distribution and coating rate were investigated. The microcapsule characteristics could be controlled by adjusting the operation conditions.
   A number of techniques were used for the characterisation of the microcapsules. A scanning electron microscope (SEM) was used to examine the morphology of particle surface. A laser particle size analyzer (LPSA) was used to measure the particle size distribution, and differential scanning calorimeter (DSC) measurements were conducted to determine the apparent coating rates of microcapsules. The advantages of SPIT lies in enhancing the mass transfer and heat transfer, which prevent particles agglomeration.