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[资源]
新氧化石墨烯片三层膜制备成功
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中科院兰州化学物理研究所固体润滑国家重点实验室研究人员在石墨烯基多层薄膜的构筑及其摩擦学性能研究方面取得新进展。在由氧化石墨烯（GO）外层和3-氨基丙基三乙氧基硅烷（APTES）自组装底层修饰的硅基片上，研究人员进一步接枝了十八烷基三氯硅烷（OTS）分子，成功地构筑了疏水的APTES-GO-OTS三层膜。对其微结构和摩擦学性能研究表明，该三层膜呈现低粘着性，且其微观摩擦学性能和宏观摩擦学性能均显著提高。 ABSTRACT: Taking advantage of the condensation between SiOH of the hydroxylated octadecyltrichlorosilane (OTS) and COH 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) selfassembled 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). |
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 膜技术 | Advanced Nanomaterials（graphere & nanotubes） | 石墨烯及其相关的主题 | Graphene |
| 石墨烯_小木虫20120421 | 石墨烯小百科 |
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2011-07-11 16:00
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2011-07-12 09:53
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