目的 为提高废弃棉织物的利用价值和利用率，将回收的废弃棉织物溶解于LiCl/DMAc溶液中，随后以水、体积分数为50%的乙醇水溶液、甲醇、乙醇、丙酮为凝固浴，通过溶胶–凝胶法成功制备高阻氧性再生纤维素(RC)薄膜。方法 采用氧气透过测试仪、水蒸气透过测试仪、拉伸测试仪、红外光谱和热重对RC膜的结构和性能进行探究。结果 不同的凝固浴条件下制备出的RC膜均具有极高的氧气阻隔性和较高的拉伸强度。其中丙酮为凝固浴的条件下制备出的RC膜的氧气阻隔性能最佳，其透氧系数可低至2.093 5×10⁻¹⁷ cm³.cm/(cm².s.Pa)，远低于相同测试条件下的普通塑料薄膜透氧系数2～4个数量级。此外，该薄膜还具有很高的力学性能，拉伸强度可达98 MPa，远高于普通聚乙烯薄膜的拉伸强度。结论 该工作制备了一种具有高阻氧性和高强度的可降解RC膜，这为废弃棉织物的回收和二次利用提供了一种新的途径。

The work aims to prepare high oxygen barrier recycled cellulose (RC) films through sol-gel method by dissolving the recycled waste cotton fabrics in LiCl/DMAc solution with water, methanol, ethanol, 50% ethanol solution and acetone as coagulation baths, respectively, so as to improve the value and utilization of waste cotton fabrics. The structure and properties of RC films were investigated with oxygen permeation tester, water vapor transmission tester, tensile tester, infrared spectroscopy and thermogravimetry. The RC films prepared under different coagulation bath conditions all exhibited extremely high oxygen barrier and high tensile strength. Among them, the RC films prepared in acetone coagulation bath had the best oxygen barrier performance, with the oxygen permeability coefficient as low as 2.093 5×10−17 cm3.cm/(cm2.s.Pa), which was 2-4 orders of magnitude lower than the oxygen permeability coefficient of ordinary plastic films under the same test conditions. In addition, the films also had high mechanical properties up to 98 MPa, which was much higher than that of ordinary polyethylene films. This work prepares a degradable RC film with high oxygen barrier and high strength, which provides a new way for recycling and secondary use of waste cotton fabrics.