Synthesis, Characterization and Adsorptive Properties of Quaternized 2-Dimethylaminoethyl Methacrylate Based Polymer–Clay Nanocomposites

[2-(Methacryloyloxy)ethyl]dimethylhexadecylammonium bromide (QDMA) was synthesized by means of quaternization of 2-dimethylaminoethyl methacrylate. Poly(QDMA) and poly(QDMA)-bentonite nanocomposites containing different amount of bentonite were prepared by in situ suspension polymerization and characterized. Adsorption behaviors of these materials towards acid orange 8 and <i>p</i>-nitrophenol were investigated with respect to solution pH. For both adsorbate, adsorption capacities of some nanocomposites were found to be higher than those of bentonite and poly(QDMA). Effects of various parameters such as contact time, initial adsorbate concentration, and temperature on the adsorption of acid orange 8 and <i>p</i>-nitrophenol onto NC3 from aqueous solutions were also evaluated.

以甲基丙烯酸二甲氨基乙酯的季铵化反应合成了[2-(甲基丙烯酰氧基)乙基]二甲基十六烷基溴化铵 ([2-(Methacryloyloxy)ethyl]dimethylhexadecylammonium bromide)。采用原位悬浮聚合法制备了聚(QDMA)以及不同膨润土（bentonite）添加量的聚(QDMA)-膨润土纳米复合材料，并对所得材料进行了表征。考察了上述材料对酸性橙8与对硝基苯酚（p-nitrophenol）的吸附行为，重点研究了溶液pH对吸附过程的影响。实验结果表明，部分纳米复合材料对两种吸附质的吸附容量均高于纯膨润土和聚(QDMA)。此外，还评估了接触时间、初始吸附质浓度、温度等多种参数对水溶液中NC3吸附酸性橙8和对硝基苯酚的影响。