富勒烯-聚甲基丙烯酸甲酯复合膜溶胶-凝胶制备与结构的研究  

Sol-Gel Fabrication and Structure Studies on C60-PMMA Composite Films

作　　者：李英兰[1] 李朝阳[2] 邹云娟[2] 严辉[2] 陈光华[1] 

机构地区：[1]兰州大学物理科学与技术学院,甘肃兰州730000 [2]北京工业大学材料科学与工程学院,北京100022

出　　处：《兰州大学学报（自然科学版）》2000年第6期46-50,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金!(19874007)

摘　　要：采用溶胶-凝胶的方法，在Si（100）衬底上制备了C60-聚甲基丙烯酸甲酯（PMMA ）复合膜.红外光谱分析表明，C60分子已均匀地分布在PMMA中，凝胶以后形成了C 60-PM MA复合膜.利用X射线衍射（XRD）谱研究了该复合膜的结构，结果表明，在200℃真空退火后 C60分子 趋向相互聚集并形成晶化C60颗粒，其尺寸强烈依赖于C60含量.随C60含 量的增加，晶化C6 0颗粒尺寸增大.高C60含量的复合膜中多晶状态的C60 颗粒，呈现面心 立方（fcc）结构〈111〉方向的择优排列特征；并且观察到XRD信号极强的、异常的333衍射 峰现象，对其产生机理进行了初步探讨.C60/PMMA composite films with different C60 contents o n Si(100) substrate were prepared by the sol-gel method. Analysis of FTIR spectr a sho wed that C60 was distributed equally among PMMA. X-ray diffraction resul ts sugg ested that C60 molecules in PMMA tended to aggregate each other and to for m some t iny crystallized C60 clusters. It was observed that the size of these cry stalli zed C60 clusters which increased with the increase of C60 content dr amatically d epended on C60 content. In case of higher C60 content, the C60 clusters had the tendency to grow with 〈111〉 preference orientation of fcc structure, as annea le d under vacuum at a high temperature close to the melt point of PMMA. In additi on , a strong 333 diffraction peak was found unexpectedly. By combining XRD measu red data with simulated results, a possible mechanism was proposed.

关 键 词：溶胶-凝胶 复合膜 结构 

分 类 号：TB43[一般工业技术]