A First-Principles Model for Plant Cell Rupture in Microwave-Assisted Extraction of Bioactive Compounds

A first-ever theoretical model describing the cell rupture mechanism for microwave-assisted extraction (MAE) of bioactive compounds from plant samples is presented. This model incorporates the microwave heating of intracellular moisture within the plant cells using Lambert’s law. It then calculates the heating time and the intrinsic energy required to pressurize and stretch the plant cells until rupture using thermodynamic relations. The attainment of cell rupture is determined from elasticity theory for solids. The simulation requires the inputs of the effective shear modulus of the plant cell wall and the incident microwave irradiation flux entering the extraction mixture. The predicted cell rupture time by the intrinsic energy validated excellently against the optimum extraction time found in experiments. This model is generally applicable over a wide extraction parameters and microwave systems.

Keywords: Theoretical Model, Microwave Heating, Cell Rupture, Extraction Time, Bioactive Compounds

JEL Classification: C61, A00, B00, C90, I20, Q20, Q00, Q16, Q32

Suggested Citation: Suggested Citation

Chan, Chung-Hung and Yeoh, Hak and Yusoff, Rozita and Ngoh, Gek-Cheng, A First-Principles Model for Plant Cell Rupture in Microwave-Assisted Extraction of Bioactive Compounds (February 22, 2016). Journal of Food Engineering, Vol. 188, p. 98-107, 2016, Available at SSRN: https://ssrn.com/abstract=2921733