Study on the structure and adsorption characteristics of the complex of modified Lentinus edodes stalks dietary fiber and tea polyphenol
Hong Chen, Xiaolong Liu, Junyan Liu, Hongxiu Fan, Jiayao Ren, Hongcheng Liu, Tingting Liu
Abstract
The waste Lentinus edodes stalks from Lentinus edodes processing were used as raw materials by the steam explosion to prepare modified Lentinus edodes stalks dietary fiber and combined with tea polyphenols to form the SE-DF-tea polyphenols complex (SE-DF-TPC). The SE-DF-tea polyphenols mixture (SE-DF-TPM) was prepared according to the complex’s optimal adsorption conditions. Fluorescence microscopy, Fourier transform infrared spectroscopy, particle size measurement, thermogravimetric analysis, and X-ray diffraction were used to analyze its structure, and the thermal stability of the complex and its adsorption capacity for lipids, cholesterol, and cholates were studied. The results indicate that dietary fiber from modified Lentinus edodes stalks and tea polyphenols form a stable complex through non-covalent bonding. In addition, the thermal stability of the phenolic substances in the complex and the adsorption capacity of the complex to fats, cholesterol, and cholates is better than modified dietary fiber and the mixture of dietary fiber and tea polyphenols. • Modification of dietary fiber from Lentinus edodes stems by steam explosion. • Preparation of composites by adsorbing tea polyphenols with modified dietary fiber. • Study the structure, functional properties and thermal stability of its complex. • Fluorescence microscopy was used to analyze and identify the structure of the complex.