非晶态多孔席夫碱的制备及碘吸附性能研究

Preparation of amorphous porous Schiff base and its iodine adsorption performance

利用简单的水热方法制备了基于席夫碱反应的非晶态多孔有机聚合物—三聚氰胺缩合邻苯二甲醛(T-3)和2,4,6-三氨基嘧啶缩合邻苯二甲醛(T-246),使用傅里叶变换红外分析仪、热重分析仪、扫描电子显微镜等手段对材料的官能团、物相组成、热稳定性和微观形貌等进行了表征,并研究了其对水中碘的吸附性能和行为.结果表明:准一级动力学模型和Freundlich等温模型可以较好地描述2种多孔有机聚合物对碘的吸附行为.T-3和T-246表现出优异的吸附性能,最大碘吸附量分别为1593.79 mg·g^(-1)和2132.05 mg·g^(-1).

The amorphous porous polymer melamine condensed phthalaldehyde(T-3)and 2,4,6-triaminopyrimidine condensed phthalaldehyde(T-246)have been successfully prepared by a facile hydrothermal method based on Schiff base reaction.The functional groups,phase composition,thermal stability and micro-morphology of the as-prepared materials were characterized by Fourier transform infrared analyzer,thermogravimetric analyzer and scanning electron microscope.The experimental results show that the quasi-first-order kinetic model and Freundlich isothermal model can well describe the adsorption behavior of iodine by two porous organic polymers.T-3 and T-246 showed excellent adsorption performance,and the maximum iodine adsorption capacity were 1593.79 mg·g^(-1)and 2132.05 mg·g^(-1).