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Published on: February 27, 2021
Preparation and characterization of octenyl succinic anhydride modified waxy maize starch hydrolyzate/chitosan
Tian Xu1, Chengchen Jiang2, Qiwei Zhou2
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, Wuxi 214122, Jiangsu Province, PR China; School of Food Science and Technology, Jiangnan University, 1800 LiHu Avenue, Wuxi 214122, Jiangsu Province, PR China; Collaborative Innovation Center for Food Safety and Quality Control, Jiangnan University, 1800 LiHu Avenue, Wuxi 214122, Jiangsu Province, PR China.
Abstract:
The preparation and characterization of colloidal complexes based on octenyl succinic anhydride starch hydrolyzate (OSAS) and chitosan (CS) were conducted. Results showed that OSA-S/CS ratio (r) and pH significantly affected complex turbidities and yields. The highest turbidity and yield were obtained at r = 6:1 when pH was fixed, and at pH 6.5 when r was fixed. All complexes remained liquid-like except that formed at pH 6.5, which exhibited a gel structure due to the strongest complexation. OSA-S/CS complexes had intertwined core-shell microstructure and exhibited electrostatic interactions between COO- and NH3+ groups of OSA-S and CS, respectively. The complexes prepared at r = 6:1 and pH 6.0 exhibited the most suitable wettability (θow = 91.97°) and interfacial adsorption dynamics. The compact lamellar network and intact cores of these complexes were also shown. This work provides profound and comprehensive information about the formation and physicochemical properties of OSA-S/CS complexes.
