基于生物的 PLA/纤维素抗菌包装的开发及其在香菇贮藏中的应用。

Development of bio-based PLA/cellulose antibacterial packaging and its application for the storage of shiitake mushroom.

机构信息

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.

出版信息

Food Chem. 2023 Dec 15;429:136905. doi: 10.1016/j.foodchem.2023.136905. Epub 2023 Jul 20.

DOI:10.1016/j.foodchem.2023.136905

PMID:37487388

Abstract

This study presents the extraction of cellulose from water bamboo byproducts to prepare polylactic acid (PLA)/cellulose antibacterial packaging material. The cellulose was modified using a silane coupling agent, which improved the interfacial compatibility between cellulose and PLA. Upon coating the PLA onto the modified cellulose sheet, the water contact angle of the composite material increased from 11.42° to 132.12° and the water absorption rate decreased from 182.52% to 55.71%, which improved the water resistance performance of the material. The addition of cinnamaldehyde in the PLA layer imparted antibacterial activity to the PLA/cellulose packaging material. This packaging material effectively inhibited the mycelial growth and spore germination of Aspergillus niger and Trichoderma harzianum isolated from shiitake mushroom. Additionally, the study investigated the effects of the composite on the postharvest quality of shiitake mushroom. Overall, the packaging material contributed to shiitake mushroom storage and can be applied to other perishable food products.

摘要

本研究从水竹副产物中提取纤维素，制备聚乳酸（PLA）/纤维素抗菌包装材料。采用硅烷偶联剂对纤维素进行改性，提高了纤维素与 PLA 的界面相容性。将 PLA 涂覆在改性纤维素片上后，复合材料的水接触角从 11.42°增加到 132.12°，吸水率从 182.52%降低到 55.71%，提高了材料的耐水性。PLA 层中添加的肉桂醛使 PLA/纤维素包装材料具有抗菌活性。这种包装材料能有效抑制从香菇中分离出的黑曲霉和木霉的菌丝生长和孢子萌发。此外，本研究还考察了该复合材料对香菇采后品质的影响。总之，该包装材料有助于香菇的贮藏，也可应用于其他易腐食品。