State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, PR China; CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
Carbohydr Polym. 2022 Feb 15;278:118922. doi: 10.1016/j.carbpol.2021.118922. Epub 2021 Nov 21.
Foodborne diseases caused by bacteria have aroused ongoing concerns for food safety. Most existing packaging plastics bring pollution and potential toxicity. Here antimicrobial dialdehyde cellophane (DACP) was developed by periodate oxidation. The structure, mechanical properties, optical properties, and barrier properties of DACP were characterized. The antimicrobial activity of DACP against four Gram-positive bacteria was studied. The packaging effect of DACP for food with high water content was evaluated, including strawberry and tofu. The antimicrobial activity of DACP improved with increased aldehyde content. Compared with the polyethylene film and cellophane, our DACP exhibited excellent antimicrobial effect and extended the shelf life of food significantly, which shows promising prospects in food packaging.
由细菌引起的食源性疾病一直以来都引起了人们对食品安全的关注。大多数现有的包装塑料会带来污染和潜在毒性。本研究通过高碘酸盐氧化法制备了抗菌二醛纤维素（DACP）。对 DACP 的结构、力学性能、光学性能和阻隔性能进行了表征。研究了 DACP 对四种革兰氏阳性菌的抗菌活性。评估了 DACP 对高水分食品（草莓和豆腐）的包装效果。随着醛含量的增加，DACP 的抗菌活性提高。与聚乙烯薄膜和玻璃纸相比，我们的 DACP 表现出优异的抗菌效果，显著延长了食品的保质期，在食品包装方面具有广阔的应用前景。
