为了探索得到可用于芳香纤维用的芳香超细颗粒,采用了以壳聚糖/薰衣草精油为一相,CO<,2>为另一相通过喷嘴雾化(SAA)法制备出壳聚糖/薰农草精油超细颗粒,考察了物料配比、预膨胀压力、预膨胀温度和溶液流率等工艺参数对所制备的颗粒形貌和粒径的影响;并对颗粒释放的气味进行气相色谱表征,以进行颗粒留香时间的考察.结果表明:降低壳聚糖/薰衣草精油物料质量体积比和预膨胀温度,升高预膨胀压力和溶液流率均有利于制备粒径较小和粒径分布较窄的颗粒.所制备得到的颗粒形态基本呈球形,平均粒径约为2.2 μm.颗粒留香时间超过5个月以上,且峰形保持较为完整,说明颗粒具有较好的缓释效果.%To get the aromatic nano-particles used in aromatic fibers, the supercritical CO2 assisted atomization (SAA) was used in the micronization of the chitosan blended with the lavender essential oil. The effect of various operating conditions, such ns materials ratio, pm-expansion pressure, pre-expansion temperature and the flow rate of the solution on the particle morphology and size were investigated. The odor emitted by the particles was characterized by gas chromatography to observe the odor lasting time. The results show that the average particle size decreases with the decreasing of the materials ratio and the pre-expansion temperature and the increasing of the preexpansion pressure as well as the flow rate of the solution, which are good for preparing the particles with smaller size and in a narrow size distribution. Most of the particles obtained by SAA process are spherical in morphology with a diameter of 2.2 μm. The image obtained by gas chromatography shows that the odor can last over 5 months with the constituents kept integrated, which reveals a good slow-release result.
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