Zhang Yongqi, Man Jia, Li Jianyong, Xing Zhe, Zhao Bin, Ji Maocheng, Xia He, Li Jianfeng
Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China.
Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China.
Int J Biol Macromol. 2022 Oct 1;218:519-532. doi: 10.1016/j.ijbiomac.2022.07.145. Epub 2022 Jul 25.
Enteromorpha prolifera belonging to the chlorophyta phylum is the main pollutant of "green tide", and propagates rapidly in recent years. However, there is almost no high-value enteromorpha treatment method at present. This study aimed to extract cellulose nanocrystals (CNC) from enteromorpha and prepare the CNC reinforced films based on alginate, carrageenan and shellac for food packaging. The effects of alginate, κ-carrageenan, cellulose nanocrystals and glycerin on the CNC reinforced alginate/carrageenan films (AC films) properties were studied systematically in this work. The results showed that the mechanical properties, swelling properties, and barrier properties of the AC could be adjusted by the concentrations of the different components. In addition, response surface methodology (RSM) was used to optimize the formula of the AC used for food packaging according to the requirements of the practical application. Furthermore, in order to further improve the food packaging capacity of the composite films, shellac was added to the optimized alginate/carrageenan films (OAC films) to obtain the shellac optimized alginate/carrageenan films (SOAC films). Finally, the OAC films and SOAC films showed excellent properties to extend the storage time of chicken breast and cherry tomatoes in the food storage experiment.
浒苔属于绿藻门，是“绿潮”的主要污染物，近年来繁殖迅速。然而，目前几乎没有高附加值的浒苔处理方法。本研究旨在从浒苔中提取纤维素纳米晶体（CNC），并制备基于海藻酸钠、卡拉胶和虫胶的CNC增强膜用于食品包装。本工作系统研究了海藻酸钠、κ-卡拉胶、纤维素纳米晶体和甘油对CNC增强海藻酸钠/卡拉胶膜（AC膜）性能的影响。结果表明，AC膜的机械性能、溶胀性能和阻隔性能可通过不同组分的浓度进行调节。此外，根据实际应用需求，采用响应面法（RSM）优化了用于食品包装的AC膜配方。此外，为了进一步提高复合膜的食品包装性能，在优化的海藻酸钠/卡拉胶膜（OAC膜）中添加虫胶，得到虫胶优化的海藻酸钠/卡拉胶膜（SOAC膜）。最后，在食品储存实验中，OAC膜和SOAC膜表现出优异的性能，可延长鸡胸肉和樱桃番茄的储存时间。
