全降解纤维素食品包装的制备及保鲜性能研究OA北大核心CSTPCD

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.