State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
Carbohydr Polym. 2024 Dec 1;345:122567. doi: 10.1016/j.carbpol.2024.122567. Epub 2024 Aug 3.
Solution blowing process was used to prepare cellulose nonwovens, by using N-methyl morpholine-N-oxide (NMMO) as solvent, and salicylic acid (SA) microcapsules as antibacterial additives. The structure and properties of cellulose nonwovens modified with different SA microcapsules contents were compared and evaluated. The results showed that more uniform and denser web structure was formed with the increase of SA microcapsules content, the average fiber diameter of cellulose nonwoven increased from 1.99 μm to 2.65 μm. The air flow resistance and filtration efficiency of cellulose nonwovens increased with addition of SA microcapsules, whereas the mechanical properties, and wearing comfort including air permeability, moisture vapor transfer rate, and softness of cellulose nonwovens decreased slightly, under the same basis weight. SA microcapsules modified cellulose nonwovens exhibited good sustained-release behavior and antimicrobial activity against Escherichia coli. The higher SA microcapsules content in cellulose nonwovens, the faster release rate and the higher antimicrobial activity. The cellulose solution-blown nonwovens modified with SA microcapsules are expected to find applications in medical and healthcare fields due to its antibacterial activity and biodegradability.
采用溶液吹塑法制备纤维素非织造布，以 N-甲基吗啉-N-氧化物（NMMO）为溶剂，水杨酸（SA）微胶囊作为抗菌添加剂。比较和评价了不同 SA 微胶囊含量的纤维素非织造布的结构和性能。结果表明，随着 SA 微胶囊含量的增加，非织造布的网络结构更加均匀致密，纤维素非织造布的平均纤维直径从 1.99μm 增加到 2.65μm。在相同基重下，添加 SA 微胶囊可以提高纤维素非织造布的空气阻力和过滤效率，而其力学性能、透气、透湿、柔软等穿着舒适性则略有下降。SA 微胶囊改性纤维素非织造布具有良好的缓释性能和对大肠杆菌的抗菌活性。纤维素非织造布中 SA 微胶囊含量越高，释放速度越快，抗菌活性越高。由于具有抗菌活性和生物降解性，SA 微胶囊改性的纤维素溶液吹塑非织造布有望在医疗和保健领域得到应用。
