聚酰胺胺类树枝形聚合物(PAMAM)插入式自组装膜的制备与摩擦学性能:小分子链长的影响  

Preparation and Tribological Properties of Inserted PAMAM SAMs:Influence of Chain Length

作　　者：崔宝凤[1,2] 周惠娣[1] 张俊彦[1] 陈建敏[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院北京研究生院,北京100049

出　　处：《摩擦学学报》2011年第1期1-6,共6页Tribology

基　　金：国家自然科学基金委创新研究群体科学基金项目(50421502);中国科学技术部(国家重点基础研究计划A1320060604)资助~~

摘　　要：在硅基片上制备了聚酰胺胺类树枝形聚合物(PAMMA)与不同链长的脂肪酸小分子复合自组装单层膜,用椭圆偏振光测厚仪、DSA 100接触角测量仪、X射线光电子能谱(XPS)和原子力显微镜(AFM)对所制备的薄膜结构进行了表征,并分别考察了薄膜的纳米摩擦学性能和宏观摩擦学性能.结果表明:C18和C12成功组装到了PAMAM单层膜上PAMAM分子间的空白处.小分子的插入减小了PAMAM自组装膜表面的摩擦力和摩擦系数,提高了PAMAM自组装膜的承载能力.小分子链长的差别对复合薄膜的结构及摩擦学性能影响的差别不明显.Composite self-assembled monolayers（SAMs） of poly（amide amine） generation 4.0（PAMAM） and fatty acid on silicon were prepared.SAMs were characterized by ellipsometry,X-ray photoelectron spectroscopy and atomic force microscopy.The nano-tribological properties and micro-tribological properties were tested.Results showed that fatty acids（C18 and C12） were inserted successfully to the blank of PAMAM molecule in PAMAM SAMs.As a result,the friction force and friction coefficients of composite SAMs were decreased while the load-carrying capacity of the composite films was increased.The difference in molecular length of C18 and C12 fatty acids did not produce obvious difference in friction coefficients and load-carrying capacity.

关 键 词：聚酰胺胺类树枝形聚合物 脂肪酸 自组装膜 原子力显微镜 横向力显微镜 

分 类 号：O647.9[理学—物理化学]