薰衣草精油微胶囊释放过程的红外光谱研究

发布时间：2018-04-08 09:04

  本文选题：薰衣草精油微胶囊　切入点：β-环糊精　出处：《光谱学与光谱分析》2017年01期

【摘要】：为了解薰衣草精油β-环糊精包合物的构成形式和精油随温度变化的缓释过程,利用傅里叶变换红外变换光谱(FTIR)技术,对薰衣草精油(LO)、β-环糊精(β-CD)及薰衣草精油微胶囊(LOM)进行红外光谱对比分析,同时对不同温度下精油缓释过程中微胶囊红外光谱变化进行了分析,并结合主成分分析,进一步探究β-CD包埋LO后物理化学稳定性及LO释放过程。结果表明,LO包埋后其特征峰有红移现象、峰形变宽,这主要受形成分子间氢键、p-π共轭现象和β-CD空间结构影响;另外,设定温度变化范围25~95℃,温度间隔10℃,测定LOM的红外光谱,以考证β-CD包埋LO的物理化学稳定性及释放情况,分析实验结果表明,LOM中水合物分子较易失去,LOM中的精油组分物理化学性质稳定,在95℃时逸出量小于6.5%,释放缓慢;对变温红外光谱数据进行主成分分析(PCA),前二个主成分的累积方差为99.3%,通过主成分载荷分析,PC1成分可认为是β-CD特征变量,PC2成分为LO特征变量,主成分结果表明,LOM包埋精油中酯类物质的释放速度要快于醇类物质。采用红外分析方法简便快捷,全面了解包埋精油的物理化学稳定性和释放过程,为薰衣草精油微胶囊释放过程的研究提供新的理论支持。
[Abstract]:In order to understand the composition of 尾 -cyclodextrin inclusion complex of lavender essential oil and the slow release process of essential oil with temperature, Fourier transform Infrared transform Spectroscopy (FTIR) technique was used.The infrared spectra of lavender essential oil, 尾 -cyclodextrin (尾 -CD) and lavender essential oil microcapsule (Lom) were compared and analyzed.The physicochemical stability and the release process of Lo after 尾-CD entrapped Lo were further investigated.The results show that the characteristic peaks are redshift and the deformation is wide, which is mainly affected by the formation of intermolecular hydrogen bond p- 蟺 conjugation and the spatial structure of 尾 -CD. In addition, the temperature range is 2595 鈩，

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