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Bulletin of Botanical Research ›› 2021, Vol. 41 ›› Issue (1): 152-160.doi: 10.7525/j.issn.1673-5102.2021.01.019

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

Qian ZHANG, Xiu-Hua ZHAO(), He-Di KANG, Xiao-Xue ZHANG, Jian-Hang YANG   

  1. College of Chemistry,Chemical Engineer and Resource Utilization,Northeast Forestry University,Harbin 150040
  • Received:2020-04-29 Online:2021-01-20 Published:2021-01-05
  • Contact: Xiu-Hua ZHAO E-mail:xiuhuazhao@nefu.edu.cn;xiuhuazhao@ nefu.edu.cn
  • About author:ZHANG Qian(1995—),female,postgraduate,major in pharmaceutical chemistry.
  • Supported by:
    Outstanding Youth Science Foundation of Heilongjiang Province(JC2018005)


Rhododendron tomentosum was abundant plant resources inthe 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.

Key words: porous starch, Rhododendron tomentosum oil, thermal stability, slow controlled release

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