Chitosan Grafted Gallic Acid /Polyvinyl Alcohol-Based Hydrogel, Developed Through the Freeze-Thaw Method, Holds Promise for Use as a Fresh-Water Absorbent Pad

作     者：Zhou, Qi Lan, Weiqing Xie, Jing 

作者机构：College of Food Science and Technology Shanghai Ocean University Shanghai201306 China Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center Shanghai201306 China National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai201306 China 

出 版 物：《SSRN》 

年 卷 期：2025年

核心收录：

主　　题：Chitosan 

摘      要：In this research, gallic acid was initially grafted onto chitosan using the carbodiimide grafting technique. Subsequently, PVA/CS-GA (PCG) hydrogels were synthesized through a process combining polyvinyl alcohol with repeated freeze-thaw cycles. The physicochemical properties of hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), compression mechanics test, tensile test, and rheology. Finally, the preservative application of sea bass fillet was studied by pH, TVB-N, and sensory evaluation. The results of FTIR confirmed that CS-GA is effectively integrated into the PVA network. SEM results showed that the prepared PCG hydrogels have a porous structure, high water content, excellent water absorption, swelling, and rheological properties. In addition, the PCG hydrogels prepared in this study have excellent antioxidant and antibacterial properties. Meanwhile, PCG hydrogels effectively extended the shelf-life of sea bass. Therefore, PCG hydrogels have excellent mechanical, rheological, antioxidant and antibacterial properties, which have broad application prospects on the preservation of aquatic products. © 2025, The Authors. All rights reserved.