Mg-Li合金表面芳烃的还原

Reduction of Aromatics on the Surface of Mg-Li Alloy

利用浸渍法研究了不同有机物体系(芳烃类)在Mg-Li合金表面的还原反应.通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)及扫描电子显微镜(SEM)等分析测试手段,考察了不同的反应物及其不同含量对有机还原反应的影响.结果表明,当反应物苯、异丙醇和氯化铵体积比为3∶2∶1时,苯在Mg-Li合金表面被还原,镁被氧化为Mg(OH)2并可能与有机物通过共价键形成类似于JPCDS标准卡片中复杂结构的C4H6MgO4,且在合金表面生长出棒状、针状等物质.

As a new type of ultra-light alloy, magnesium-lithium（Mg-Li） alloy has great prospects for structural materials and other fields. The organic reduction reaction can be occurred between Mg-Li（magnesiumlithium） alloy with high activity and functional groups with oxidative and other activities. In this dissertation, Mg-Li alloy was impregnated for the first time in different organic compounds （aromatics） , and investigated that if organic functional groups were reinstated on its surface. By means of XRD, FTIR and SEM, different reactants and their content were investigated to the effect of organic reduction reaction. The results show that when the volume ratio of aromatics, isopropyl alcohol and ammonium chloride is 3： 2： 1, benzene is reduced on the surface of Mg-Li alloy, magnesium is oxidized to Mg（OH） 2, complicated C4H6MgO4 （the JPCDS standard cards） may be produced through the covalent bonding between Mg（OH） 2 and organic compound. At the same time, various morphologies of composites such as stick-like, needle-like and flake-like were formed on the surface of Mg-Li alloy.