全降解纤维素食品包装的制备及保鲜性能研究  

Preparation of cellulose-based food packaging and research on its preservation property

作　　者：毕士程 林宝凤[1] BI Shicheng;LIN Baofeng(School of Chemistry and Chemical Engineering,Guangxi University,Nanning530004,China)

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《包装与食品机械》2024年第4期14-21,共8页Packaging and Food Machinery

基　　金：国家自然科学基金项目(22175045);广西自然科学基金重大项目(2021GXNSFDA220005)

摘　　要：为探究纤维素在食品保鲜中的应用,通过[Emim]EDP离子液体实现纤维素均相改性,制备得到不同季铵化程度的纤维素膜,考察其抗菌、耐水、阻气、力学性能以及对草莓的保鲜效果。结果表明,当季铵化程度为0.8时,得到的纤维素膜具有优异的广谱抗菌、耐水和阻气性能,以及最佳的力学性能,抗拉强度和拉伸率分别为6.99 MPa和122%。QCL0.8膜包装的草莓分别比无包装、PE包装的草莓延长3,6 d货架期,可以在土壤中经23 d完全降解。研究为替代不可降解的石化塑料包装材料提供新的选择。In order to investigate the application of cellulose-based materials in food preservation,cellulose films with different degrees of quaternarization were prepared first by homogeneous modification of cellulose achieved via[Emim]EDP ionic liquid.The antibacterial properties,water resistance,gas barrier properties,mechanical properties,and preservation effects on strawberries were investigated for the cellulose films.The results show that when the degree of quaternarization is 0.8,the cellulose film obtained has excellent broad-spectrum antibacterial properties,water resistance and gas barrier properties,and the best mechanical properties,with tensile strength and elongation of 6.99 MPa and 122%,respectively.The strawberries packaged with QCL0.8 film extend their shelf life by 3 and 6 days compared to unpackaged and PE-packaged strawberries,respectively.The QCLs can be completely biodegraded in soil after 23 days.The study provides a new choice for a new alternative to non-biodegradable petrochemical plastic packaging.

关 键 词：离子液体 纤维素 季铵化 食品包装 水果保鲜 

分 类 号：TS206.4[轻工技术与工程—食品科学]