Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites et Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100 Rabat, Morocco.
Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites et Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100 Rabat, Morocco.
Int J Biol Macromol. 2021 Aug 1;184:981-989. doi: 10.1016/j.ijbiomac.2021.06.168. Epub 2021 Jun 29.
In the present investigation, novel photoluminescent and transparent biocomposite films based on chitosan reinforced with styrylbenzothiazolium-g-cellulose nanocrystal for anti-counterfeiting applications were successfully prepared by casting solvent. Three novel styrylbenzothiazolium derivatives were synthesized by Knoevenagel condensation and characterized by FTIR, H, C NMR and photoluminescence analysis. These photochromic compounds have been used to functionalize cellulose nanocrystal and the resulting fluorescent photonic materials were characterized by FTIR, C-CP/MAS NMR as well as photoluminescent analysis to confirm the successful grafting. It can be concluded that the addition of 5 wt% of fluorescent modified CNC to chitosan matrix increase the photoluminescent properties as well as improved the mechanical properties of the Cs/CNC-dye biocomposite films. These photoluminescent biocomposite film hold promising applicative value in anti-counterfeiting material in large-scale.
在本研究中，通过浇注溶剂成功制备了基于壳聚糖的新型荧光透明生物复合膜，该复合膜由苯乙烯基苯并噻唑鎓- g-纤维素纳米晶增强，可用于防伪应用。通过 Knoevenagel 缩合合成了三种新型苯乙烯基苯并噻唑鎓衍生物，并通过 FTIR、H、C NMR 和光致发光分析进行了表征。这些光致变色化合物已用于功能化纤维素纳米晶，所得荧光光子材料通过 FTIR、C-CP/MAS NMR 以及光致发光分析进行了表征，以确认成功接枝。可以得出结论，在壳聚糖基质中添加 5wt%的荧光改性 CNC 可提高光致发光性能，并改善 Cs/CNC-染料生物复合膜的机械性能。这些荧光生物复合膜在大规模防伪材料中具有广阔的应用价值。
