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1、物理化学学报(WuliHuaxueXuebao)DecemberActaPhys.鄄Chim.Sin.,2009,25(12)：2581-25892581[Article]www.whxb.pku.edu.cn铝合金表面原位自组装超疏水膜层的制备及耐蚀性能*李松梅周思卓刘建华(北京航空航天大学材料科学与工程学院,空天材料与服役教育部重点实验室,北京100191)摘要：采用阳极氧化法在铝合金表面原位构造粗糙结构,经表面自组装硅氧烷后得到超疏水自清洁表面,与水滴的接触角最大可达157.5毅依2.0毅,接触角滞后小于3
2、毅.通过傅立叶变换红外(FT鄄IR)光谱分析仪、场发射扫描电子显微镜(FE鄄SEM)、能谱仪(EDS)、原子力显微镜(AFM)和接触角测试对阳极氧化电流密度、硅氧烷溶液中水的含量和自组装时间等参数进行了分析,并得到制备超疏水自清洁表面的最优工艺参数.FE鄄SEM及AFM的测试结果表明,由自组装硅氧烷膜层的无序性形成的纳米结构和阳极氧化构造的微米级粗糙结构与硅氧烷膜层的低表面能的协同作用构成了稳定的超疏水表面.电化学测试(动电位极化)的结果表明,原位自组装超疏水膜层极大地提高了铝合金的耐蚀性.关键词：超疏水;原位;
3、自组装;硅氧烷;耐蚀性中图分类号：O647;O646FabricationandAnti鄄CorrosionPropertyofInsituSelf鄄AssembledSuper鄄HydrophobicFilmsonAluminumAlloys*LISong鄄MeiZHOUSi鄄ZhuoLIUJian鄄Hua(KeyLaboratoryofAerospaceMaterialsandPerformanceoftheMinistryofEducation,SchoolofMaterialsScienceandEngi
4、neering,BeihangUniversity,Beijing100191,P.R.China)Abstract：Insituroughstructuresonanaluminumalloywereformedbyanodicoxidationmethod.Aftersiloxaneself鄄assemblyontheroughstructures,super鄄hydrophobicandself鄄cleaningfilmswerefabricated.Thestaticcontactangleofthesu
5、per鄄hydrophobicsurfacewithawaterdropwas157.5毅依2.0毅atitsmaximumandthecontactanglehysteresiswaslessthan3毅.Theinfluenceofanodicoxidationcurrentdensity,thewatercontentofthesiloxanesolution,andself鄄assemblytimeonfilmformationwerestudiedbyFouriertransforminfrared(F
6、T鄄IR)spectroscopy,fieldemissionscanningelectronmicroscopy(FE鄄SEM),energydispersivespectroscopy(EDS),atomicforcemicroscopy(AFM)andcontactanglemeasurements.Optimumparameterstofabricatethesuper鄄hydrophobicsurfacewereobtained.FE鄄SEMandAFMresultsindicatedthatmicro
7、structureswereobtainedbyanodicoxidationandnanostructureswereobtainedbythedisorderofself鄄assemblyfilm.Stablesuper鄄hydrophobicsurfaceswereproducedbythecooperationofmicro/nano鄄structuresandthelowsurfacefreeenergyofthesiloxanefilms.Theelectrochemicalmeasurement(p
8、otentiodynamicpolarization)indicatedthattheanti鄄corrosionpropertyofthealuminumalloywasgreatlyimprovedbytheinsitusuper鄄hydrophobicfilm.KeyWords：Super鄄hydrophobic;Insitu;Self鄄assembly;Silox
