An anti-fouling and antibacterial surface of cellulose film was obtained by one-step coagulation of the cellulose-LiCl/Dimethyl acetamide (DMAc) solution with AgNO₃ and polyvinyl pyrrolidone (PVP). The AgCl nanocrystals were embedded on the surface of cellulose film with the assistance of PVP, and the Ag@AgCl was formed due to the partly decomposition of AgCl under the visible-light irradiation. Morphology and size of the Ag@AgCl in cellulose matrix could be regulated by changing the concentration of PVP. From a series of comparative tests, Ag@AgCl could be stably embedded on cellulose film at the concentration of 1 wt% PVP, and its photo-degradation efficiency could be still retained 89% after 5-cycle testing. Meanwhile, a dramatic reduction in viable bacteria was also observed within 120 min of exposure on this film, and when exposure time was 180 min, no active bacteria was observed.This work provided a simple pathway to construct the functional cellulose film which could be applied as packaging materials.

中文翻译：

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利用Ag @ AgCl纳米粒子引发的光催化降解一步一步凝结构建耐用的防污和抗菌纤维素膜

通过将纤维素-LiCl /二甲基乙酰胺（DMAc）溶液与AgNO ₃一步凝结，可获得纤维素膜的防污和抗菌表面。和聚乙烯吡咯烷酮（PVP）。在PVP的帮助下，将AgCl纳米晶体包埋在纤维素膜的表面，由于AgCl在可见光照射下的部分分解而形成了Ag @ AgCl。可以通过改变PVP的浓度来调节纤维素基中Ag @ AgCl的形态和大小。通过一系列比较试验，可以将Ag @ AgCl以1 wt％PVP的浓度稳定地包埋在纤维素膜上，经过5个循环的测试，其光降解效率仍然可以保持89％。同时，在该膜上曝光120分钟内还观察到活菌的急剧减少，并且在180分钟的曝光时间下未观察到活性细菌。这项工作为构建可应用的功能性纤维素膜提供了一条简单的途径。作为包装材料。