Laboratory of Bioorganic and Macromolecular Chemistry, Department of Chemistry, Faculty of Sciences and Technology, Cadi Ayyad University, 40000 Marrakesh, Morocco; Center of Analysis and Characterization, Cadi Ayyad University, 40000 Marrakesh, Morocco.
Laboratory of Bioorganic and Macromolecular Chemistry, Department of Chemistry, Faculty of Sciences and Technology, Cadi Ayyad University, 40000 Marrakesh, Morocco.
Int J Biol Macromol. 2020 May 15;151:492-498. doi: 10.1016/j.ijbiomac.2020.02.204. Epub 2020 Feb 19.
The biopolymer α-chitin is a promising raw source that can be used as a low-cost material for environmental applications. Nevertheless, its low surface properties and high crystallinity limit its use. Recent developments include surface modification as one of the most promising strategies for the application of α-chitin. To this end, we used an acidic treatment, followed by ultrasonication, to modify the α-chitin surface and improve its sorption characteristics to achieve the above goal. Structural analysis and measurement of the physicochemical properties (chemical structure and thermal degradation) of α-chitin, before and after surface modification, indicated no significant changes. However, specific surface area, morphology, surface charge, crystallinity and study of the sorption of methylene blue (MB) from aqueous solution demonstrated surface modification. It was established that the S of modified α-chitin increased to 110.7 m/g and the crystallinity index decreased to 48%. Interestingly, the modified α-chitin could easily adsorb organic dye from an aqueous solution. The experimental adsorption capacity of the resulting α-chitin after surface modification reached the value of about 95 mg/g.
生物聚合物 α-壳聚糖是一种很有前途的原料，可以用作低成本的环境应用材料。然而，其低表面性能和高结晶度限制了其应用。最近的发展包括表面改性，这是将 α-壳聚糖应用的最有前途的策略之一。为此，我们使用了酸性处理，然后进行了超声处理，以改变 α-壳聚糖的表面，并改善其吸附特性，以实现上述目标。对 α-壳聚糖进行表面改性前后的结构分析和物理化学性质（化学结构和热降解）的测量表明，没有明显的变化。然而，比表面积、形态、表面电荷、结晶度和亚甲基蓝（MB）在水溶液中的吸附研究表明表面改性。结果表明，改性后的 α-壳聚糖的 S 值增加到 110.7 m/g，结晶度指数下降到 48%。有趣的是，改性后的 α-壳聚糖可以很容易地从水溶液中吸附有机染料。表面改性后得到的 α-壳聚糖的实验吸附容量达到约 95 mg/g。
