生物高聚物
热重分析
壳聚糖
接触角
聚合物
化学
采后
涂层
肿胀 的
化学工程
扫描电子显微镜
纤维素
多糖
核化学
傅里叶变换红外光谱
材料科学
复合材料
有机化学
植物
工程类
生物
作者
Changqing Ruan,Xiaoou Kang,Kaifang Zeng
标识
DOI:10.1016/j.ijbiomac.2022.01.010
摘要
Biopolymers, e.g., polysaccharides and protein, have been employed as edible coatings for the preservation of fruits for many years and are the promising candidates for resolving the problems caused by the extensive using of synthesized polymers in recent years. Chitosan, a kind of polysaccharide with excellent antibacterial and coatings forming properties, has attracted a lot of research interests in being applied as an edible coating for the preservation of postharvest fruits. However, the applying of chitosan is restricted by its poor stability. In this study, we introduce the water-soluble dialdehyde cellulose (DAC) as the crosslinking agent for chitosan to enhance its stability. Fourier transform-infrared spectroscopy is applied to prove the happening of crosslinking and the detection of swelling ratio in water and mechanical properties of DAC-crosslinked chitosan (DAC/CS) confirms the enhanced stability. Furthermore, scanning electron microscope, thermogravimetric analysis, water contact angle, mechanical and gas barrier properties are performed to characterize DAC/CS films with different DAC contents. Finally, DAC/CS is employed as a coating agent to study the effect on the storage of mandarin fruit at room temperature. Chitosan, with enhanced stability by biopolymer, would be a promising candidate applied as a green edible coating in the preservation of fruits.
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