Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2021-01-29 , DOI: 10.1016/j.carbpol.2021.117714 Nengyuan Bian 1 , Xiaoli Yang 1 , Xinli Zhang 1 , Fangdong Zhang 1 , Qingxi Hou 1 , Jicheng Pei 1
The laccase/TEMPO system was employed to oxidise the C6 primary hydroxyl group on the chitosan (CS) to form a carboxyl group to obtain oxidised chitosan (C-COS). The silver-oxidised chitosan complex(C-COS-Ag) was prepared by reacting C-COS with silver nitrate, then C-COS-Ag and cotton fibres were subjected to a reaction to prepare bacteriostatic fibres. FT-IR and XPS analysis showed that: Ag+ and C-COS were combined in these forms: Ag, [Ag(NH3)2] OH, -COOAg, and Ag2O. C-COS-Ag was combined with cotton fibres by way of ester bonds. The inhibition zone of bacteriostatic fibres was all greater than 11 mm. After 50 washing tests, the bacteriostatic effect of bacteriostatic fibres remained at above 99 %. The amount of silver ions that had migrated from the bacteriostatic fibre was 3.336 mg/kg.
中文翻译:
氧化壳聚糖和银离子的复合物接枝到具有抑菌特性的棉纤维上
采用漆酶/TEMPO体系氧化壳聚糖(CS)上的C6伯羟基形成羧基,得到氧化壳聚糖(C-COS)。C-COS与硝酸银反应制备银氧化壳聚糖复合物(C-COS-Ag),C-COS-Ag与棉纤维反应制备抑菌纤维。FT-IR和XPS 分析表明: Ag +和 C-COS 以下列形式结合:Ag、[Ag(NH 3 ) 2 ] OH、-COOAg 和 Ag 2O. C-COS-Ag 通过酯键与棉纤维结合。抑菌纤维的抑菌圈均大于11mm。经过50次洗涤试验,抑菌纤维的抑菌效果保持在99%以上。从抑菌纤维迁移的银离子量为3.336mg/kg。