纤维吸附剂的TEM,SEM—EDAX研究  

Research on Fibrous Adsorbent by Means of TEM and SEM-EDAX

作　　者：陈慧贞[1] 蒋安北[2] 庄万金 

机构地区：[1]国家海洋局第三海洋研究所 [2]厦门大学分析测试中心

出　　处：《电子显微学报》1990年第4期46-52,共7页Journal of Chinese Electron Microscopy Society

摘　　要：本文对纤维吸附剂(聚丙烯腈纤维导入偕胺肟基和羧基的双功能基团纤维吸附剂)藉透射电镜(TEM)和扫描电镜——X射线色散能量分析谱(SEM—EDAX)进行研究。该类型吸附剂用于海水提铀研究及海水中某些核素含量分析的样品前处理。研究结果表明吸附剂制备条件、纤维表面形貌结构、吸附性能之间密切相关。欲得较佳性能的纤维吸附剂需控制反应条件,既使得高分手骨架键连上两种功能基团,又大体上不损坏纤维表皮层及多孔层基本结构形貌,该类型吸附剂同时吸附海水中多种元素,但对过渡金属元素富集作用较强。TEM和SEM—EDAX对研究纤维吸附剂样品是一种有鼓的方法。研究结果对吸附剂的制备条件的选择和控制有一定的指导意义。文中还对纤维吸附剂的吸附作用的本质进行了简要的讨论。Research on fibrous adsorbent, which was made of polyacrylonitrile fiber by bonding amidoxime and carboxy groups in order to obtain bifunctional group adsorbent, by means of TEM (Transmisstion Electron Microscone) and SEM-EDAX (Energy Dispersive Analysis of X-ray). This kind of adsorbent was used for extraction uranium from seawater and pretreatment of seawater in several nuclide contents analysis. It was discovered that there is intimate relationship among preparation conditions, fiber structure and appearance and adsorptive power. It will be necessary to keep fundamentaly the original appearance and structure of surface-skin layer and porous layer of fiber if we want to obtain fibrous adsorbent with a better adsorptive power. Many elements in seawater are adsorbed but the enrichment coefficient is higher for transition-metals. TEM and SEM-EDAX are effective methods for study of fiber and have some directive significances for preparation, in addition, the adsorption substance is brieflly discussed.

关 键 词：海水 铀 提取 纤维吸附剂 TEM SEM 

分 类 号：TL212.5[核科学技术—核燃料循环与材料]