基于酚醚结构的偕胺肟基聚合物的制备及U(Ⅵ)吸附行为研究  

Design and fabrication of amidoxime functionalized phenolic ether-polymers for U(Ⅵ) extraction

作　　者：唐震巽 吴一超 王子龙 郝梓淇 曲钊 姬濯宇 王祥科[1] Zhenxun Tang;Yichao Wu;Zilong Wang;Ziqi Hao;Zhao Qu;Zhuoyu Ji';Xiangke Wang(MOE Key Laboratory of Resources and Environmental System Optimization,College of Environmental Science and Engineering,North China ElectricPowerUniversity,Beijing102206,China)

机构地区：[1]资源环境系统优化教育部重点实验室,华北电力大学环境科学与工程学院,北京102206

出　　处：《中国科学：化学》2024年第7期1117-1126,共10页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:U2267224)资助项目。

摘　　要：核能作为一种低碳清洁的能源,是国家重点发展对象之一.铀元素是核能的重要组成部分,但我国陆地铀矿储量有限,限制了核能的发展.海洋中共有约45亿吨铀,可满足核能的长期发展需要.本文从材料结构设计出发,利用廉价的工业化原料四氟对苯二腈(TFTPN)与依昔苯酮(Exi)/4,4′-二羟基苯偶酰(DDB)进行交联及偕胺肟功能化,制备出三种酚醚结构的U(Ⅵ)吸附材料:ExiF-AO、ExiF-2-AO和DDBF-AO,并对材料结构/配体与吸附性能间的关系进行探究.结果表明,相比结构相似的线性聚合物ExiF-AO和DDBF-AO,网状交联结构的ExiF-2-AO具有更强的吸附能力,吸附量达347.5 mg/g,同时具备较好的可回收性与理化稳定性.本文从分子结构层面探讨了材料结构对U(Ⅵ)吸附的影响,为用于大规模海水提铀的功能材料的设计、制备提供了借鉴.As a low-carbon and clean energy source, nuclear energy is one of the priority development targets of the country. Uranium is an important component of nuclear energy, which limits the development of nuclear energy due to China′s limited uranium reserves on land. However, there are about 4.5 billion tons of uranium in the ocean, which can meet the long-term needs of nuclear energy's development. Herein, starting from the structure design of material, three uranium adsorption polymers with phenol ether structure: ExiF-AO, ExiF-2-AO and DDBF-AO, were prepared by cheap industrial raw material tetrafluorophenone(TFTPN) and exifone(Exi)/4,4′-dihydroxybenzoyl(DDB) through crosslinking and amidoximation, and the relationships between materials' structure/ligand and adsorption properties were systematically studied. The results showed that compared with the similar linear structure polymers ExiF-AO and DDBF-AO, ExiF-2-AO with a reticular cross-linked structure had a higher adsorption capacity reached 347.5 mg/g, as well as a better recyclability and physicochemical stability. In this paper, the effects of polymer structure on uranium adsorption were discussed at the molecular structure level, providing some references for the rational design and fabrication of functional materials for extensive uranium extraction.

关 键 词：共价有机聚合物 偕胺肟 铀吸附 

分 类 号：TL212[核科学技术—核燃料循环与材料] TQ317[化学工程—高聚物工业] O647.3[理学—物理化学]