Institute of Biomass and Function Materials & National Demonstration Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; Hubei Provincial Engineering Laboratory for Clean Production and High Value Utilization of Bio-Based Textile Materials, Wuhan Textile University, Wuhan 430200, PR China.
Institute of Biomass and Function Materials & National Demonstration Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
Food Chem. 2024 May 1;439:138119. doi: 10.1016/j.foodchem.2023.138119. Epub 2023 Dec 1.
The study presents a new class of eco-friendly and biodegradable biomass-based multifunctional antibacterial packaging films (G-OCSI) based on oxidized corn starch-based nonionic biopolymer (OCSI) and gelatin (Gel), and investigates the effects of different OCSI contents on the properties of G-OCSI. The results demonstrated that G-OCSI 0.25 had good water vapor barrier properties, antioxidant activity (DPPH RSA: 85.84 %), UV resistance (UV blocking > 99.9 %), water resistance (WCA: 122.30°), and tensile properties. Based on the disk diffusion experiment, G-OCSI exhibited significant bactericidal and antibacterial effects against S. aureus and E. coli. Moreover, G-OCSI had good biodegradability in natural environments, and could obviously accelerate the crops growth. Finally, a banana preservation experiment confirmed that G-OCSI could significantly extend the shelf life of bananas at room temperature at least 3 days. The biodegradable packaging films not only realizes the sustainable utilization of biomass resources but also has the potential to replace traditional petroleum-based plastics.
该研究提出了一类基于氧化玉米淀粉基非离子型生物聚合物（OCSI）和明胶（Gel）的新型环保可生物降解生物质多功能抗菌包装薄膜（G-OCSI），并考察了不同 OCSI 含量对 G-OCSI 性能的影响。结果表明，G-OCSI 0.25 具有良好的水蒸气阻隔性能、抗氧化活性（DPPH RSA：85.84%）、抗紫外线性能（UV 阻断率>99.9%）、耐水性（WCA：122.30°）和拉伸性能。基于圆盘扩散实验，G-OCSI 对金黄色葡萄球菌和大肠杆菌表现出显著的杀菌和抑菌作用。此外，G-OCSI 在自然环境中具有良好的生物降解性，能明显促进作物生长。最后，香蕉保鲜实验证实，G-OCSI 能显著延长香蕉在室温下的货架期，至少 3 天。这种可生物降解的包装薄膜不仅实现了生物质资源的可持续利用，而且具有替代传统石油基塑料的潜力。
