目的 明确吸氧剂在阻氧薄膜中的阻氧机理和对阻氧薄膜理化性能的影响。方法 将市售的3种吸氧剂(CoFresh 162、valOR 115J和Amosorb 4020E)添加至PET基材，制备阻氧薄膜。将阻氧薄膜浸入水中测试其吸氧量，采用氧气透过率测试系统表征其氧气透过率，采用雾度仪和扫描电镜(SEM)表征其雾度、透光率和相分离微观形貌。结果 含3种不同吸氧剂的阻氧薄膜均可主动有效地吸收水中溶氧，30 d吸氧量分别可以达到9.83、9.80和8.89 cm³/g。加入吸氧剂可以大幅提升阻氧薄膜的主动阻氧性能，但随着时间的延长，吸氧剂的效果会逐渐降低。含5%吸氧剂的3种阻氧薄膜的雾度值分别为5.5%、6.8%和20.7%，吸氧剂的加入会降低阻氧薄膜的力学性能。结论 在吸氧剂的理化性能研究中采用基于氧气透过率测试的主动阻氧性能的概念，用于评价吸氧剂的吸氧动力学。由评价结果可知，CoFresh 162吸氧剂具有最优的主动吸氧性能、阻氧性能和较低的雾度值，可用于制备单层阻氧薄膜/瓶，适用于食品包装材料。

The work aims to clarify the oxygen-blocking mechanism of oxygen scavengers in oxygen-blocking films and their influence on the physical and chemical properties of the films. Three commercially available oxygen scavengers (CoFresh 162, valOR 115J, and Amosorb 4020E) were added to PET substrates to prepare oxygen-blocking films. The oxygen absorption capacity of the films was tested by immersing them in water, and their oxygen transmission rate was characterized with an oxygen transmission rate testing system. The haze, light transmittance, and microstructure of phase separation were characterized with a haze meter and a scanning electron microscopy (SEM). The oxygen-blocking films containing the three different oxygen scavengers could actively and effectively absorb dissolved oxygen in water, with the oxygen absorption amounts reaching 9.83, 9.80, and 8.89 cm3/g after 30 days, respectively. The addition of oxygen scavengers could significantly enhance the active oxygen-blocking performance of the films, but the effect of the scavengers would gradually decrease over time. The haze values of the three oxygen-blocking films containing 5% oxygen scavengers were 5.5%, 6.8%, and 20.7%, respectively. The addition of oxygen scavengers would reduce the mechanical properties of the films. The concept of active oxygen-blocking performance based on oxygen transmission rate testing is adopted in the study of the physical and chemical properties of oxygen scavengers to evaluate the oxygen absorption kinetics of the scavengers. The evaluation results indicate that CoFresh 162 has the best active oxygen absorption performance, oxygen-blocking performance, and the lowest haze value, and can be used to prepare single-layer oxygen-blocking films/bottles, suitable for food packaging materials.