壳聚糖-铜离子有序凝聚体的形貌  

On the Morphology of the Ordered Chitosan-Cu^(2+) Condensates

作　　者：王彬[1] 蔡继业[1] 冯倩[1] 杨培慧[1] 梁志红[1] 曾谷城[1] 孙彩军[1] 

机构地区：[1]暨南大学化学系,广州510632

出　　处：《应用化学》2004年第2期113-116,共4页Chinese Journal of Applied Chemistry

基　　金：国家"九七三"项目 ( 2 0 0 1CB5 10 10 1) ;国家自然科学基金 ( 60 2 780 14 ) ;国家自然科学重点项目 ( 3 0 2 3 0 3 5 0 );广东省科技攻关项目( 2 0 0 2C3 2 40 4)资助

摘　　要：用原子力显微镜对自然风干后的壳聚糖絮凝剂富集铜离子后的样品在非接触模式下进行观察。结果表明 ,在未完全脱水时 ,由壳聚糖 铜离子形成的胶粒有较规则的排列。脱水后的样品中 ,壳聚糖 铜离子胶粒进一步聚集 ,形成较为规则的由一些小颗粒堆积而成的环形凝聚体。铜离子被络合的过程可能类似于以颗粒为组成单元的螺旋盘绕过程。而浓度较大的样品中则形成由胶粒组成的规则圆盘 ,其直径在 3 5～ 5 0 μm之间。The mechanism of the Cu 2+ enriching process by chitosan as a flocculant chelating compound has been studied through morphological observation by AFM in noncontact mode. The colloid chitosan-Cu 2+ aggregates were found to be regularly aligned. It could be further condensed by dehydration to from a more regular cyclic shape in small particle units. The process appears similar to that resulted by screw winding of particles. The higher concentrated sample is a regular disc-like shape. The range of disc diameters was between 35～ 50 μm.

关 键 词：壳聚糖 铜离子 形貌学 原子力显微镜 

分 类 号：O614[理学—无机化学] Q531[理学—化学]