Active packaging with multifunctional properties from nanocomposite of chitosan and nanosized TiO₂ to be used as ethylene scavenging and antimicrobial film was developed. Chitosan films containing different TiO₂ concentrations (0, 0.25, 0.5, 1 and 2% w/w) were fabricated and characterized for structural, mechanical, optical and barrier properties. The scanning electron microscope images showed that TiO₂ nanoparticles evenly distributed in the chitosan film matrix. However, the spontaneous agglomeration of the TiO₂ was observed at high TiO₂ concentration. The X–Ray diffraction patterns presented that crystallinity of TiO₂ in the nanocomposite films increased with TiO₂ concentration. The Fourier transform infrared spectra indicated that there were hydrogen bonding and O-Ti-O bonding between TiO₂ and chitosan, which affected the tensile strength, elongation at break, and water vapor barrier properties of the films. The chitosan-TiO₂ nanocomposites exhibited ethylene photodegradation which increased with increasing TiO₂ concentration. Based on tensile strength, water barrier and ethylene photocatalytic degradation properties, chitosan film containing 1% TiO₂ (CT1) was found to be optimal and, hence, was selected for antimicrobial evaluation. The results suggested that the CT1 exhibited antimicrobial activity against Gram-positive (Staphylococus aureus) and Gram-negative (Escherichia coli, Salmonella Typhimurium, and Pseudomonas aeruginosa) bacteria and fungi (Aspergillus and Penicillium).

从壳聚糖和纳米TiO _2的纳米复合材料开发了具有多功能特性的活性包装，以用作乙烯清除和抗菌膜。制备了包含不同TiO ₂浓度（0、0.25、0.5、1和2％w / w）的壳聚糖薄膜，并对其结构，机械，光学和阻挡性能进行了表征。扫描电子显微镜图像显示，TiO ₂纳米颗粒均匀分布在壳聚糖膜基质中。然而，在高TiO ₂浓度下观察到TiO ₂的自发团聚。X射线衍射图案呈现的TiO该结晶₂在纳米复合材料膜有TiO增加₂专注。傅立叶变换红外光谱表明，TiO ₂与壳聚糖之间存在氢键和O-Ti-O键，影响了薄膜的拉伸强度，断裂伸长率和水蒸气阻隔性能。壳聚糖-TiO ₂纳米复合材料表现出乙烯光降解，其随TiO ₂浓度增加而增加。基于抗张强度，阻水性和乙烯的光催化降解性能，发现含有1％TiO ₂（CT1）的壳聚糖膜是最佳的，因此被选作抗菌评估。结果表明，CT1对革兰氏阳性（金黄色葡萄球菌）和革兰氏阴性（金黄色葡萄球菌）均具有抗菌活性。大肠杆菌，鼠伤寒沙门氏菌和铜绿假单胞菌）和真菌（曲霉和青霉菌）。