多孔淀粉固化杜香精油的制备及缓释性能研究

Preparation and Slow Controlled Release of Porous Starch Solidifying Rhododendron tomentosum Oil

我国东北地区拥有丰富的杜香植物资源。该植物带有独特香气,带叶嫩枝含油量较高。然而,杜香精油挥发性强,稳定性差,香气不持久和携带不便等缺点限制了杜香精油及其相关产品的开发和利用。本文将主要探究了多孔淀粉固化杜香精油的制备工艺及其缓释性能。利用精油粉末化技术,采用研磨吸附的方法,制备了固化杜香精油粉末。利用DSC和TG探究了固化精油粉末的热学稳定性能并探究了其在不同温度下的缓释持香效果结果表明:多孔淀粉的最大吸油量为1.42 g·g^-1。多孔淀粉与杜香精油的质量比为1∶0.75(g·g^-1)时,固化精油粉末的气味较好,呈现出淡黄色粉末状态;固化精油粉末的保留率为杜香精油的3.57倍体现出其良好的热学稳定性;在同一温度下,相同时间内固化精油粉末比未固化精油的缓释持香效果更显著。多孔淀粉固化杜香精油的制备工艺简单,样品缓释持香效果明显,具有一定的应用推广价值。

Rhododendron tomentosum was abundant plant resources in the northeast of China.The plant was a distinctive aroma and high oil content in leaves.For the disadvantages of high volatility,poorly stable,short fragrance and inconvenient carry of R.tomentosum oil,it limited the development and utilization of essential oil related products.We explored the preparation and slow controlled release of porous starch solidifying R.tomentosum oil.The solidified essential oil powder was prepared by grinding and adsorption.DSC and TG were used to investigate the thermal stability of the solidified essential oil powder and the effect of the slow controlled release fragrance at different temperatures.The results showed that the maximum adsorption capacity of porous starch was 1.42 g·g^-1.When the mass ratio of porous starch to essential oil was 1∶0.75(g·g^-1),the solidified essential oil powder smelt well and presented yellowish powder.The thermal stability of the solidified essential oil was 3.57 times higher than the retention rate of essential oil.At the same temperature,the slow controlled release fragrance effect of solidified essential oil powder was more significant than that of uncured essential oil powder at the same time.The preparation process of the porous starch solidified essential oil was simple,and the effect of sustained release of the sample was obvious with the application and promotion values.