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Rice glutelin fibrils fabricated with natural deep eutectic solvents: Physicochemical characteristics,
Zheng-Meng Pei1, Quan-Yun Zhao1, Wen-Hui Zha1
1School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.
Abstract:
To enhance the properties of rice glutelin through effective and safe fibrillation, rice glutelin fibrils (RGFs) were fabricated using natural deep eutectic solvents (NADES, prepared by citric acid and choline chloride). Effects of three NADES concentrations (L (1.4 M), M (2.0 M), and H (2.5 M)) on the physicochemical characteristics, microstructure, and rheological properties of RGFs were evaluated. The results demonstrated that NADES significantly influenced the fibrillation of RGFs through the effect of the deamidation and the secondary nucleation mechanism. NADES-L and NADES-M enhanced fibrillation in a dose-dependent manner, while NADES-H exhibited inhibitory fibrillation due to hydrogen bond competition. NADES-M improved the conversion efficiency of RGFs, with a fibrillation time of 2.5 h and an increase in the ζ-potential from 29.3 to 38.1 mV, and achieved excellent rheological properties due to a 33 % increase in fibrils diameter. This study provides insights into RGFs with NADES.
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