海藻酸钠自组装体系的AFM研究  

Study on self-assembly films of sodium alginate by AFM

作　　者：周世海[1] 蔡继业[1] 

机构地区：[1]暨南大学生命科学技术学院化学系,广东广州510632

出　　处：《电子显微学报》2004年第5期544-547,共4页Journal of Chinese Electron Microscopy Society

基　　金：国家973项目(No 2001CB510101);国家自然科学基金资助项目(No 60278014);国家自然科学基金重点项目(No 30230350);教育部科技重点项目(No 00124).

摘　　要：运用原子力显微镜(AFM)对不同浓度海藻酸钠在云母表面上形成的自组装膜进行了研究,实验结果显示在0 001mg ml时,海藻酸钠出现单分子聚集体形态;0 01mg ml和0 05mg ml时,呈现致密、紧凑的网格状结构。随着浓度的改变,海藻酸钠自组装表面超微结构也发生变化。初步分析了影响其表面超微结构变化的一些因素并运用耗散理论探讨了这种变化过程可能的机理。Self-assembly films of sodium alginate of different concentrations on the mica surface were observed by atomic force microscope(AFM).The results showed that the monomolecular congregative shape were formed at the concentration of 0.001mg/ml,and nano-network configurations were formed at the condition of 0.01mg/ml and 0.05mg/ml.The nano-network structures of sodium alginate changed with different concentrations.The factors which affected the nano-network structures were analyzed and the mechanism was discussed with the theory of dissipative structure.

关 键 词：海藻酸钠 改变 影响 因素 实验结果 研究 体形 表面超微结构 浓度 变化过程 

分 类 号：O631[理学—高分子化学] S513[理学—化学]