纤维素基包装阻隔膜的研究进展

Research progress of cellulose-based packaging barrier film

摘要:

电子产品寿命、太阳能电池转换效率以及食物货架期等与包装材料的阻氧阻湿性能密切相关。在双碳目标及限塑令的实施下,开发纤维素基可生物降解的包装阻隔材料具有重要意义。纤维素由于资源丰富、可再生、阻隔性好等优点,被广泛应用于柔性包装。以不同尺寸、结构及物化性质的纤维素为出发点,综述了近年来纤维素基阻隔材料的研究进展。从阻隔机制角度出发,系统阐述了再生纤维素、纤维素衍生物及纳米纤维素基阻隔膜的制备及阻隔性能,重点分析了不同纤维素基质或功能填料对于复合阻隔膜性能的影响,总结了纤维素基阻隔膜在包装材料领域的先进应用,展望了多组分纤维素基包装阻隔膜材料开发过程面临的挑战。

Abstract:

The oxygen and moisture resistance of packaging materials are highly related to the life of electronic products, the conversion efficiency of solar cells and the shelf life of food. It is critical to develop biodegradable barrier materials for packaging responding to the goals of double-carbon target and ban on free plastic bags. Recently, cellulose has been widely used in flexible packaging due to the advantages in abundant resources, renewability and barrier properties. Our current study integrated research progress of cellulose-based barrier materials over the years mainly aiming to different sizes, structures and physicochemical properties of cellulose. We further elucidated the preparation and properties of oxygen and moisture resistance among barrier films, regenerated cellulose、cellulose derivatives and nanocelluloses according the diversity of in barrier mechanisms. Especially, comparative analyses were employed to explore performance of composite barrier films between different cellulose matrices or functional fillers. Meanwhile, we summarize the advanced applications of cellulose-based barrier films in the field of packaging and the challenges in the development process of multi-component cellulose-based packaging barrier film materials are prospected.