Abstract

In this study, a novel hydrogel nanocomposite was synthesized via surface reversible addition fragmentation chain transfer polymerization of acrylic acid onto chitosan in the presence of silver nanoparticles. The structure and composition of the as-prepared nanocomposites were identified by FTIR, XRD, UV–Vis, SEM and TEM techniques. The prepared nanocomposite was used as an excellent product for the adsorption of crystal violet cationic dye. The experimental results depicted that the solution pH, dye concentration and temperature had high effect on dye adsorption capacities. The isotherm and kinetics models of the dye adsorption of nanocomposites were investigated. Moreover, the thermodynamic data demonstrated that the adsorption behavior of dyes were spontaneous and endothermic. Furthermore, the synthesized nanocomposites showed an antibacterial effect on Gram-negative E. coli bacterium. In summary, the obtained results depicted that the prepared dye adsorbents with unique properties of high adsorption capacities, easy recovery and antibacterial properties can be used as ideal candidates for many applications such as wastewater treatment, biological systems and wound dressing.

中文翻译：

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基于羧化 RAFT 剂/银纳米颗粒的抗菌水凝胶纳米复合吸附剂的合成，可有效吸附染料

摘要

在这项研究中，在银纳米粒子存在下，通过丙烯酸在壳聚糖上的表面可逆加成断裂链转移聚合合成了一种新型水凝胶纳米复合材料。通过 FTIR、XRD、UV-Vis、SEM 和 TEM 技术鉴定了所制备的纳米复合材料的结构和组成。所制备的纳米复合材料是吸附结晶紫阳离子染料的优良产品。实验结果表明，溶液pH值、染料浓度和温度对染料吸附能力影响较大。研究了纳米复合材料染料吸附的等温线和动力学模型。此外，热力学数据表明染料的吸附行为是自发的和吸热的。此外，大肠杆菌。总之，所获得的结果表明，所制备的染料吸附剂具有高吸附容量、易于回收和抗菌特性等独特性能，可作为废水处理、生物系统和伤口敷料等许多应用的理想候选者。