羧甲基纤维素
溶菌酶
江蓠
食品科学
多糖
纤维素
食品包装
化学
植物
生物
生物化学
藻类
有机化学
钠
作者
Shiyuan Chang,Xinyuan Zou,Biyang Zhu,Lijun You,Zhengang Zhao,Kseniya Hileuskaya
标识
DOI:10.1016/j.foodhyd.2022.108109
摘要
In this study, Gracilaria chouae polysaccharide (GCP) was prepared and mixed with carboxymethylcellulose (CMC) and lysozyme to develop a novel active packaging film (named GCLF). The GCP was mainly composed of galactose (55.17%), glucose (21.87%) and galacturonic acid (6.3%), with a high molecular weight (>700 kDa). It also showed pseudoplastic behavior and high apparent viscosity at 3%, presenting potential properties for film-forming. The addition of 3% GCP could improve the film's UV-light barrier capacity by 61.05%, modulus of elasticity by 46.5% and tensile strength by 58.67%. Simultaneously the incorporation of GCP increased the film's lightness and yellowness in color. Scanning electron microscopy (SEM) indicated that the film matrixes were well entanglementing and showed a tight and continuous microstructure. Fourier transform infrared spectrometer (FT-IR) and differential scanning calorimeter (DSC) confirmed the interactions between GCP, CMC and lysozyme on film performance. The addition of 3% GCP in the GCLF could prolong the shelf life of bass (at least 3 days). Specifically, it decreased the total number of microorganisms, total volatile basic nitrogen (TVBN), and improved sensory acceptance during 6-day storage. Besides, the GCLFs did not show toxicity in vitro on ICE-6 cells. In a word, GCP could be used as a film-forming substance, increasing the film's modulus of elasticity and its preservation properties in sea bass. The study will enlarge the application of seaweed polysaccharides in food packaging. • Gracilaria chouae polysaccharide (GCP) could be used as a film-forming substance. • GCP could improve the mechanical properties of films. • The GCP-based film kept the bass fresher for longer. • The GCP-based film showed non-toxicity on IEC-6 cells.
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