文献名： Preparation and characterization of octenyl succinylated starch microgels via a water-in-oil (W/O) inverse microemulsion process for loading and releasing …

作者 ： Wei Gao ^abc ， Jie Zhu ^a ， Pengfei Liu ^ab ， Bo Cui ^ab ， A. M. Abd El-Aty ^ade

^a State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China

^b School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong 250353, China

^c Department of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China

^d Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt

^e Department of Medical Pharmacology, Medical Faculty, Ataturk University, Erzurum, Turkey

摘要： Corn starch (CS), octenyl succinic anhydride modified corn starch (OSCS) and shells (OSC _s ) microgels have been prepared using water-in-oil (W/O) inverse microemulsions for loading and releasing of epigallocatechin gallate (EGCG). The structural and morphological properties of CS, OSCS, and OSC _s  microgels were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Transmission electron microscopy (TEM), and Thermogravimetric analysis (TGA). The strong hydrogen bonds between starch molecules in the W/O system and interplay between hydroxyl groups of EGCG and oxygen atoms of starch microgels were formed. OSC _s  microgel showed low average particle size and weak thermal stability with an irregular shape and a typical V-type crystalline structure. Encapsulation efficiency (EE) and clearance rate of 2,2-diphenyl-1-picrylhydrazyl (DPPH) for EGCG were ranged between 41.78 and 63.89% and 75.53–85.37%, respectively, when absorbed into OSCS and OSC _s  microgels, the values which were higher than that of CS microgel. Further, OS starch microgels (particularly OSC _s ) modulated the slow release of EGCG into simulated gastrointestinal tract conditions and therefore could be proposed as an encapsulating agent for loading polyphenols.

关键词： Octenyl succinylated starch ； Microgels ； Epigallocatechin gallate ； Encapsulation efficiency ； Loading ； Releasing ； Polyphenols