聚萘二胺的合成及其对重金属离子的高效反应吸附

聚萘二胺是继聚苯胺和聚吡咯之后的又一类新型导电高分子,因聚合物中含有活性 的自由胺基和亚胺基而具有新的多功能性.作者根据近期研究工作和国外最新文献,系统论述了聚1,8-、1,5-、2,3-萘二胺的化学氧化合成和电化学氧化合成及其对重金属离子的络合和还原吸附功能,详细比较了两种聚合方法的特点. 指出通过萘二胺的电化学氧化聚合可以方便地获得对重金属离子如Ag⁺、Pb²⁺、Hg²⁺、Cu²⁺、VO²⁺敏感的修饰电极,而通过化学 氧化聚合可以高产率地获得对Ag+具有极大的还原吸附容量的聚合物颗粒.聚萘二胺在痕量 金属离子的分析与探测、工业废水中贵金属离子的回收和重金属离子的清除等领域展现了广阔的应用前景.

The Synthesis of Polydiaminonaphthalene and Its Highly Reactive Adsorption for Heavy Metal Ions

Polydiaminonaphthalene is a new type of conducting polymer following polyaniline and polypyrrole, which possess new multiple functionalities owing to the amine and secondary amino groups in the polymer chain. The chemically and electrochemically oxidative synthesis of poly1,8-, 1,5- and 2,3-diaminonaphthalene, as well as their adsorptions for heavy metal ions via complexation or redox, are systematically reviewed based on our recent research and the latest literature. The characteristics of the two synthetic methods are compared in detail. It is pointed out that polydiaminonaphthalene-modified electrodes sensitive to heavy metal ions,such as Ag , Pb 2 , Hg 2 , Cu 2 , VO 2 ,could be simply obtained by electrochemically oxidative polymerization. The polydiaminonaphthalene particles having a prodigious reduction adsorption capacity for Ag could be prepared with a high yield by chemically oxidative polymerization. The polydiaminonaphthalenes have shown a great potential development in analysis and detection for trace metallic ions, as well as the recovery of precious metal ions and removal of heavy metal ions from water effluents.