Biobased tractable films consisting of blends of chitosan (CS) with polymer bearing carbazole derivatives as pendant groups and fluorene-thiophene as donor-acceptor units (referred to as DA) were prepared, and their optical, morphological and photocatalytic properties were studied. DA was dissolved in tetrahydrofuran (THF) and mixed with an acidified aqueous solution containing chitosan to obtain chitosan/DA (CS/DA) films by solution casting. The fabricated biobased films were characterized using spectroscopic techniques (FT-IR and UV–vis), thermogravimetry, mechanical assays, contact angle analysis, and atomic force microscopy (AFM). The effects of varying DA compositions and the results of exposure to visible-light irradiation of the films were also analyzed. The results indicated the existence of interactions between chitosan and DA and a potentially profitable light-driven response of these biobased films. This behavior was reflected in the optical, topographical, and contact angle properties of the films, which exhibited different characteristics before and after visible-light exposure. Finally, the photocatalytic performance of the biobased films was tested via the decomposition of methyl orange (MO), as a reaction model system. Our results revealed a significant photocatalytic activity (according to biobased film composition, approximately 64 % and 87 % of methyl orange were degraded under continuous visible-light irradiation for 120 min) of the films which is attributed to the combined presence and synergetic effects of the film-forming ability of chitosan and the photoproperties of DA.

制备了由壳聚糖（CS）与含有咔唑衍生物作为侧基的聚合物和芴-噻吩作为供体-受体单元（称为DA）的共混物组成的生物基可处理膜，并研究了它们的光学，形态和光催化性能。将DA溶解在四氢呋喃（THF）中，并与包含壳聚糖的酸化水溶液混合，通过溶液流延获得壳聚糖/ DA（CS / DA）膜。使用光谱技术（FT-IR和UV-vis），热重分析，机械分析，接触角分析和原子力显微镜（AFM）对制成的生物基薄膜进行表征。还分析了不同DA组成的影响以及薄膜在可见光照射下的曝光结果。结果表明壳聚糖和DA之间存在相互作用，并且这些生物基薄膜具有潜在的获利的光驱动响应。这种行为反映在薄膜的光学，形貌和接触角特性上，在可见光曝光之前和之后，它们表现出不同的特性。最后，作为反应模型系统，通过分解甲基橙（MO）来测试生物基薄膜的光催化性能。我们的结果表明，该薄膜具有显着的光催化活性（根据生物基薄膜的组成，在连续可见光照射120分钟后降解了约64％和87％的甲基橙），这归因于该薄膜的结合存在和协同作用壳聚糖成膜能力与DA的光化学性质