新型坡缕石/多羟基树状高分子复合材料的制备及性能研究

以NaBH4还原水杨醛席夫碱修饰坡缕石为核，采用发散法通过与三聚氯氰、4-氨甲基哌啶、水杨醛、NaBH4还原的重复反应制备了1.0~2.0 G多羟基树状高分子/坡缕石复合材料，利用红外光谱、元素分析、热重对复合材料结构进行了表征，扫描电子显微镜测定了复合材料的外部形貌。吸附实验表明：该复合材料对废水中有机酚、重金属离子的吸附能力优于坡缕石原土，10 mg第二代树状高分子/坡缕石在293K，对初始质量浓度是50 mg/L的对硝基苯酚、对苯二酚、Pb(II)的吸附量分别是35.3 mg/g、34.02 mg/g、44.8 mg/g，吸附动力学拟合结果符合拟二级动力学方程。

Preparation palygorskite / polyhydroxy dendrimer polymer composite material and its adsorptive properties

Palygorskite/ polyhydroxy dendrimer polymer composite material was prepared by divergent method using cyanuric chloride, 4-(aminomethyl)piperidine, salicylaldehyde and reduced salicylaldehyde Schiff base modified palygorskite with NaBH4 as raw material. The structures of composite materials were characterized by FI-IR, TG and elemental analysis. The morphology of materials was measured by SEM. The adsorption capability of composite material for organic phenol or heavy metal ions was superior to palygorskite in aqueous solution. The results had indicated that the maximum adsorption capacity of the second generation dendrimers polymer/ palygorskite (PGS-G2) for p-nitrophenol, hydroquinone and Pb(II) was 35.3 mg/g, 34.02 mg/g, 44.8 mg/g at 293K, pH 5.0 and the amount of the adsorbent was 10 mg when the initial concentration was 50 mg/L. The adsorption kinetics data indicated that the adsorption fitted well with the pseudo-second-order kinetic model.