三嗪基多孔有机聚合物的合成及碘吸附性能研究

Study on Synthesis of Triazine-based Porous Organic Polymer and Its Iodine Adsorption Properties

核工业废料中放射性碘的富集严重威胁着人类的身体健康。因此,近年来高效捕获碘的材料的开发备受科研人员的关注。三嗪基多孔有机材料因其高的稳定性、特殊的化学结构,是一类具有广泛应用前景的多孔有机聚合物材料。采用廉价易得的三聚氯氰和4,4’-二氨基联苯通过一锅法且无催化剂的亲核取代反应制备了一种具有π-π共轭结构的三嗪基多孔有机聚合物(Tra-POPs)。这种特殊的结构,使得Tra-POPs具有优异的热稳定性。同时,研究了其在碘蒸气和有机溶剂中碘的捕获能力。结果表明:Tra-POPs对碘-环己烷溶液中碘的吸附量最高可达147.65 mg·g^(-1),在碘蒸气中70 min的吸附量可达343%(质量分数)。

The enrichment of radioactive iodine in nuclear industrial waste is a serious threat to human health. Therefore, in recent years, the development of efficient iodine capture materials has attracted the attention of researchers. Triazine based porous organic materials are a kind of porous organic polymer materials with wide application prospects due to their high stability and special chemical structure. In this paper, triazine based porous organic polymer(Tra POPs) with π-π conjugated structure was prepared by one pot nucleophilic substitution of cyanuric chloride and 4,4’-diaminobiphenyl. This special structure makes the Tra POPs have excellent thermal stability. At the same time, the iodine capture capacity of Tra POPs in iodine vapor and organic solvent was studied. The results showed that the highest adsorption capacity of Tra POPs for iodine in iodine cyclohexane solution was 147.65 mg·g-1, and the adsorption capacity in iodine vapor for 70 min was 343%(wt).