Study on vacuum drying kinetics and processing of the Lonicera japonica Thunb. aqueous extracts
Xu P. Zhang Z. Peng X. Yang J. Li X. Yuan T. Jia X. Liu Y. Abdullaev O. Jenis J.
15 September 2022Academic Press
LWT
2022#167
To reveal the vacuum drying mechanism of aqueous extracts and develop vacuum drying processing to provide theoretical guidance for Lonicera japonica Thunb. aqueous extracts, the effects of vacuum pressure (10, 15, 20, 25, 30 kPa), drying temperature (80, 90, 100, 110, 120 °C), and material thickness (2, 4 mm) of vacuum drying on the moisture ratio, drying rate, material temperature, moisture effective diffusivity, activation energy, content and distribution of moisture, water-solubility, flowability, antioxidant capacity, and the contents of chlorogenic acid and galuteolin contents were investigated. Results showed that the drying mechanism of the aqueous extracts was different from that of conventional porous media, which contains drying stagnation and boiling phenomenon. The initial bound water content of the aqueous extracts was 100%, and the bound water will not convert to free water during vacuum drying. The best vacuum drying process for the L. japonica Thunb. aqueous extracts was 30 min, 4 mm, 120 °C and 10 kPa.
Aqueous extracts , Drying kinetics , L. japonica Thunb. , Physicochemical properties , Vacuum drying
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Xian Jiaotong University, Shanxi, Xian, China
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
Key Laboratory of Equipment and Energy-saving Technology on Food & Pharmaceutical Quality Processing, Storage and Transportation, China National Light Industry, Beijing, China
Qingdao University of Science and Technology, Qingdao, China
Namangan State University of Uzbekistam, Namangan, Uzbekistan
Research Center for Medicinal Plants, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Xian Jiaotong University
Technical Institute of Physics and Chemistry
Key Laboratory of Equipment and Energy-saving Technology on Food & Pharmaceutical Quality Processing
Qingdao University of Science and Technology
Namangan State University of Uzbekistam
Research Center for Medicinal Plants
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