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CSME 2020/08
Volume 41 No.4
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521-524
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Combination of Microwave Instrumentation and Green Technology Based on Magnetic Ionic Liquid for Effective Extraction of Bioactive Polyphenols
Zhang-xing Guo a, Chen Chen a, Alula Yohannes a and Shun Yao a
aCollege of Chemical Engineering, Sichuan University, Chengdu, 610065, P .R. China.
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Abstract:
In this study a kind of magnetic ionic liquid (MIL) was used as extractant for tea polyphenols (TP). Compared with ultrasonic-assisted mode in previous study, the extraction time was shortened significantly from 300 min to 7 min. Moreover, MIL can be easily recovered by external magnetic field. As the result, when microwave power was set at 200 W and solid-liquid ratio was 1:20, 159.8 mg/g could be obtained as the highest extraction efficiency of 0.8 mol/L C3MIMFeCl4 (N-propyl substituted methylim-idazole ferric tetrachloride salt). Besides that, stability of TP together with related intermolecular interactions were further investigated under related conditions by spectroscopic analysis; it was proved IL could provide greater stabilization energy for these extracted objects in this study at some extent. Through comparison with current applications and extraction performance, the developed method and related baisc data are expected to promote the industrialization of green effective technologies based on ILs and microwave.
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Keywords: Microwave; Magnetic Ionic Liquid; Tea Polyphenols; Green Technology
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©
2020
CSME , ISSN 0257-9731
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