College of Life Science, Tarim University, Alar, Xinjiang 843300, China.
College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
J Colloid Interface Sci. 2016 Apr 1;467:230-238. doi: 10.1016/j.jcis.2016.01.031. Epub 2016 Jan 16.
We employed two polar monomers, triallyl isocyanurate (TAIC) and butyl acrylate (BA), to copolymerize with divinylbenzene (DVB), and synthesized two starting copolymers labeled PDT and PDB. Then, the Friedel-Crafts alkylation reaction was performed for the two starting copolymers, and the residual pendent vinyl groups were consumed, and hence we obtained two novel polar-modified post-cross-linked resins PDTpc and PDBpc. The surface polarity greatly improved due to introduction of the polar monomers, and the Brunauer-Emmett-Teller (BET) surface area and pore volume significantly increased after the Friedel-Crafts alkylation reaction. Compared with the starting copolymers, the non-polar post-cross-linked resin PDVBpc and some other adsorbents in the references, PDTpc and PDBpc possessed a much enhanced adsorption to Rhodamine B, and the equilibrium capacity reached 578.2mg/g and 328.7mg/g, respectively, at an equilibrium concentration of 100mg/L, and the Freundlich model characterized the equilibrium data very well. The adsorption was a fast process and the kinetic data obeyed the micropore diffusion model. These results confirmed that PDTpc and PDBpc had the potential superiority in adsorptive removal of Rhodamine B from aqueous solution.
我们采用两种极性单体三烯丙基异三聚氰酸酯（TAIC）和丙烯酸丁酯（BA）与二乙烯基苯（DVB）共聚，合成了两种起始共聚物，分别标记为 PDT 和 PDB。然后，对这两种起始共聚物进行傅克烷基化反应，消耗掉残余的悬垂乙烯基，从而得到两种新型的极性改性后交联树脂 PDTpc 和 PDBpc。由于引入了极性单体，表面极性大大提高，经过傅克烷基化反应后，BET 比表面积和孔体积显著增加。与起始共聚物相比，非极性后交联树脂 PDVBpc 和参考文献中的其他一些吸附剂，PDTpc 和 PDBpc 对 Rhodamine B 的吸附能力有了很大的提高，在平衡浓度为 100mg/L 时，平衡容量分别达到 578.2mg/g 和 328.7mg/g，平衡数据非常符合 Freundlich 模型。吸附是一个快速的过程，动力学数据符合微孔扩散模型。这些结果证实，PDTpc 和 PDBpc 在从水溶液中吸附去除 Rhodamine B 方面具有潜在的优势。
