Self-Assembly of Octadecyltrichlorosilane on Graphene Oxide and the Tribological Performances of the Resultant Film
Self-Assembly of Octadecyltrichlorosilane on Graphene Oxide and the Tribological Performances of the Resultant Film
复制标题
十八烷基三氯硅烷在氧化石墨烯上的自组装及其所得薄膜的摩擦学性能
DOI：
10.1021/jp200597k
复制
发表时间：
2011-05-26
影响因子：
3.7
通讯作者：
Yang, Shengrong
中科院分区：
文献类型：
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作者：
Ou, Junfei;Wang, Ying;Yang, Shengrong
利用羟基化十八烷基三氯硅烷（OTS）的Si- oh与C-OH在氧化石墨烯（GO）表面的缩合作用，将OTS接枝到由氧化石墨烯外层和（3-氨基丙基）三乙氧基硅烷（APTES）自组装层组成的氧化石墨烯基双层膜上。因此，成功制备了一种编码为APTES-GO-OTS的疏水三层膜。为了确定三层膜的化学成分、结构和形态，采用了各种手段，包括水接触角测量、衰减全反射傅里叶变换红外光谱（ATR-FTIR）、x射线光电子能谱（XPS）和原子力显微镜（AFM）。此外，为了研究其摩擦学性能，利用AFM和UMT摩擦计进行了微观和宏观摩擦学实验。结果表明，制备的三层膜在微观和宏观尺度上都具有较低的附着力，大大降低了摩擦力。因此，这种三层膜适合应用于纳米/微机电系统（NEMS/MEMS）的润滑和保护。
Taking advantage of the condensation between Si-OH of the hydroxylated octadecyltrichlorosilane (OTS) and C-OH on graphene oxide (GO) surface, we grafted OTS onto the GO-based dual-layer film, which was composed of GO outerlayer and (3-aminopropyl)triethoxysilane (APTES) self-assembled underlayer, on a Si substrate. Thus, a hydrophobic trilayer film coded as APTES-GO-OTS was prepared successfully. To confirm the chemical composition, structure, and morphology of the trilayer film, various means including water contact angle measurement, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectrometry, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) were performed. Moreover, to investigate the tribological performances, the micro- and macrotribological experiments were conducted with AFM and a UMT tribometer. The results showed that the as-prepared trilayer film exhibited low adhesion and greatly reduced the friction force in both the micro- and macroscale. Therefore, such a trilayer film is suitable for an application in the lubrication and protection of nano/microelectromechanical systems (NEMS/MEMS).