Preparation, Optimization, and Characterization of Inclusion Complexes of Cinnamomum longepaniculatum Essential Oil in β-Cyclodextrin

Yue Yan, Xin Zhao, Chao Wang, Qiong Fang, Lu Zhong and Qin Wei
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Yue Yan: Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644001, China
Xin Zhao: Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644001, China
Chao Wang: Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644001, China
Qiong Fang: Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644001, China
Lu Zhong: Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644001, China
Qin Wei: Sichuan Province Engineering Technology Research Center of Oil Cinnamon, Yibin 610039, China

Sustainability, 2022, vol. 14, issue 15, 1-14

Abstract: Cinnamomum longepaniculatum essential oil (CLEO) possesses antibacterial, anti-inflammatory, and antioxidant activities. However, CLEO shows volatilization and poor solubility, which limits its application field. In this research, inclusion complexes of β-cyclodextrin (β-CD) with CLEO were produced, and its physicochemical properties were characterized. Response surface methodology was used to obtain optimum preparation conditions. A statistical model was generated to define the interactions among the selected variables. Results show that the optimal conditions were an H 2 O/β-CD ratio of 9.6:1 and a β-CD/CLEO ratio of 8:1, with the stirring temperature of 20 °C for the maximal encapsulation efficiency values. The physicochemical properties of CLEO/β-CD inclusion complexes (CLEO/β-CD-IC) were investigated. Fourier transform infrared spectroscopy showed that correlative characteristic bands of CLEO disappeared in the inclusion complex. X-ray diffraction presented different sharp peaks at the diffraction angle of CLEO/β-CD-IC. The thermogravimetric analysis demonstrated the thermal stability of CLEO was enhanced after encapsulation. Tiny aggregates with a smaller size of CLEO/β-CD-IC particles were observed by scanning electron microscopy. The comparison of β-CD, CLEO, and physical mixtures with CLEO/β-CD-IC confirmed the formation of inclusion complexes.

Keywords: Cinnamomum longepaniculatum essential oil; cyclodextrin; encapsulation; response surface methodology (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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