再生纤维素/壳聚糖/银纳米线抗菌复合膜制备及性能

以1-丁基-3甲基咪唑氯盐（Bmim]Cl）为溶剂体系，通过微晶纤维素（MCC）溶解再生制备基膜，壳聚糖（CS）、银纳米线（AgNW）共混液包覆方法制备抗菌复合膜，通过FTIR、XRD、SEM和热重分析对复合膜的形貌和结构进行表征及对力学、光学、阻隔、抑菌等性能测试分析。结果表明，壳聚糖和银纳米线成功复合于纤维素基膜，与再生纤维素膜相比，当AgNW质量分数为0.5%时，复合膜的拉伸强度提升了12.2%，透光率保持在89.82%，氧气透过率下降了86.7%，且对大肠杆菌具有良好的抑制作用，制备出一种力学性能、光学性能、阻隔性能、抗菌性能优异的可降解纤维素/壳聚糖/银纳米线抗菌复合膜。

Preparation and performance of regenerated cellulose / chitosan / silver nanowire antibacterial composite film

The base film was prepared by dissolving and regenerating microcrystalline cellulose (MCC) with 1-butyl-3-methylimidazole chloride (Bmim]Cl) as solvent system. The antibacterial composite film was prepared by coating chitosan (CS) and silver nanowire (AgNW) blend solution. The morphology and structure of the composite film were characterized by Fourier infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis, and the mechanical, optical and antibacterial properties were tested and analyzed. The results showed that chitosan and silver nanowires were successfully compounded on the cellulose based film. Compared with the regenerated cellulose film, when the mass fraction of AgNW was 0.5%, the tensile strength of the composite film increased by 12.2%, the light transmittance of the film remained at 89.82%, and had a good inhibitory effect on E. coli. A degradable cellulose / chitosan / silver nanowire antibacterial composite film with excellent mechanical, optical and antibacterial properties was prepared.