功能化碳微球构建自组装膜

Self-assembly film of functionalized carbon microspheres

采用浓HNO3和H2O2对原始CMSs进行表面修饰,使其团聚现象得到改善;以氧化后CMSs作为结构基团,采用垂直沉积法实现CMSs的自组装,得到CMSs薄膜。考察了溶剂、悬浮液pH值、悬浮液浓度和反应温度对自组装的影响。采用场发射扫描电子显微镜和原子力显微镜对产物进行表征分析,结果表明,以NaOH溶液为溶剂配制悬浮液、悬浮液浓度为2%(质量)、pH=13、温度为50℃时得到了排列较为致密的薄膜。所得样品在自然光的照射下,呈现出一定强度的反射光且颜色较为均匀,说明所得自组装膜有较好的均匀性。

To improve the dispersibility of carbon microspheres（CMSs）,their surfaces were first oxidized by a mixture of concentrated HNO3 and H2O2.Then oxidized-CMSs were self-assembled by vertical deposition,and the effects of solvent,pH value of the suspension,suspension concentration and reaction temperature on self-assembly were investigated.The morphologies of all samples were characterized by field emission scanning electron microscopy and atomic force microscopy.The results showed that the CMSs film with more ordered and denser structure was obtained using NaOH solution as solvent for preparing suspension,at suspension concentration of 2%（mass）,pH of 13 and deposition temperature of 50℃.The sample showed good reflection of light with uniform color,which indicated the formation of uniform CMSs film.