高效吸附水溶液中 Pd2+ 和 Ag+ 的巯基功能化聚合物的合成,Journal of Polymer Science

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高效吸附水溶液中 Pd2+ 和 Ag+ 的巯基功能化聚合物的合成
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2023-10-09 , DOI: 10.1002/pol.20230269
Yuli Fu ₁ , Wenxiu Duan ₂ , Jiaqi Chen ₂ , You Wang ₃ , Yiwen Cao ₃ , Bin Wang ₂ , Shihua Zhong ₂ , Mancai Xu ₂ , Ting Lei ₁ , Jianhan Huang ₃

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本文通过Friedel-Craft烷基化和亲核取代合成了两种巯基功能化聚合物EDT-HCPS和TMPMP-HCPS，并用于从水溶液中吸附Pd ²⁺和Ag ⁺ 。 Friedel-Crafts 烷基化为聚合物提供了由大量刚性亚甲基组成的超交联框架。亲核取代给聚合物带来了丰富的功能性SH基团（硫含量分别为12.6和9.4wt%）。吸附结果表明，EDT-HCPS上的Pd ²⁺和Ag ⁺容量比TMPMP-HCPS大，并且较高数量的功能性SH基团和孔隙率发挥了有益的作用。平衡数据可以通过Langmuir模型来表征，并且预计308 K下EDT-HCPS上Pd ²⁺和Ag ⁺的最大容量分别为383.92和212.93 mg g ^-1。所制备的聚合物表现出优异的吸附选择性、重现性和可重复使用性，展示了其对Pd ²⁺和Ag ⁺的优异吸附性能，并且吸附机理分析表明， SH基团由于强化学络合作用而发挥了主要作用功能性 SH 与 Pd ²⁺ /Ag ⁺。

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Synthesis of sulfhydryl-functionalized polymers for the efficient adsorption of Pd2+ and Ag+ from aqueous solution

Herein, two sulfhydryl-functionalized polymers, namely, EDT-HCPS and TMPMP-HCPS, were synthesized according to the Friedel-Craft s alkylation and nucleophilic substitution, and they were used to adsorb Pd²⁺ and Ag⁺ from aqueous solution. The Friedel-Crafts alkylation offered the polymers with hyper-cross-linking frameworks composed of plentiful rigid methylene. The nucleophilic substitution brought abundant functional SH groups (the sulfur contents were 12.6 and 9.4 wt%, respectively) to the polymers. The adsorption results showed that the capacities of Pd²⁺ and Ag⁺ on EDT-HCPS were larger than TMPMP-HCPS, and the higher quantities of functional SH groups and the porosity played a beneficial role. The equilibrium data can be characterized by the Langmuir model, and the maximum capacities of Pd²⁺ and Ag⁺ on EDT-HCPS at 308 K were predicted to be 383.92 and 212.93 mg g⁻¹, respectively. The produced polymers represented superior adsorption selectivity, reproducibility, and reusability, demonstrating their excellent performance for the adsorption of Pd²⁺ and Ag⁺, and analysis of the adsorption mechanism demonstrated that the SH groups played a major role due to the strong chemical complexation of the functional SH with Pd²⁺/Ag⁺.

更新日期：2023-10-09

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