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ID:52349010
大小:1.59 MB
页数:9页
时间:2020-03-26
《可控阵列微纳结构超疏水铜表面冰霜传质特性.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~E(WuliHuaxueXuebao11970Acta博.一Chim.Sin.2014,30(10),1970—1978October[Article]doi:10.3866/PKU.WHXB201408045w、^r、V.whxb.pku.edu.cn可控阵列微纳结构超疏水铜表面冰霜传质特性张友法吴洁’余新泉’梁彩华吴俊。(东南大学材料科学与工程学院,江苏省先进金属材料高技术研究重点试验室,南京211l89;东南大学z%源-与环境学院,南京210096;东南大学电子科学与工程学院,南京210096)摘要:金属表面粗糙结构及其润湿性对其露、霜、冰的相变及传质现象有重要影
2、响.通过电火花微加工和化学氧化法,本文首先实现了铜片表面微米、纳米阵列结构的可控制备.针对条纹,方柱和四棱锥三种典型微米结构特征,对比研究了单级粗糙结构和二级复合结构超疏水表面的润湿性、结露、结霜、结冰及其融化过程.微纳复合结构可有效增强超疏水性,减少霜晶形核和生长速度,同时还能大幅度延缓结冰的时间多次冷热循环处理后,表面仍能保持较好的防霜抗冰性能.通过经典形核理论,Brown凝并,一维传热及传质理论,综合分析了冰霜在这种表面的传质特性.关键词:阵列结构;超疏水;抗结冰;传质中图分类号:0647FrostandIceTransportonSuperhydrophobicCopper
3、SurfaceswithPatternedMicro..andNano..StructuresZHANGYou—Fa,WUJie’YUXin—Quan’LIANGCai—HuaWUJun。(JiangsuKeyLaboratoryofAdvancedMetallicMaterials,SchoolofMaterialsScienceandEngineering,SoutheastUniversityNanjing211189,PR.China;。SchoolofEnergyandEnvironment,SoutheastUniversity,Nanjing210096,PR.Chi
4、na;DisplayR&Dcenter,SchoolofElectronicScienceandEngineering,SoutheastUniversity,Nanjing210096,R.China、Abstract:Textureandwettabilityhaveanimportantinfluenceonfogging,frosting,andicingonametalsurface.Wefabricatedmicro·andnano—structurepatternsonacoppersurfacebywireelectdcaIdischargemachiningand
5、subsequentchemicaIoxidation.Bycontrollingthemanufacturingprocess,threetypesofmicrostructureweremachined:gratings,pillars,andpyramids.Wethenstudiedthewettingperformanceofthesuperhydrophobicsu—-aceswithone-tiertextureortwo—tiertextureandthecorrespondingtransportofwaterindiferentphasestatesinclud
6、ingfog.frostandicingandtheirmeltingprocesses.1.W0一tierroughnessonthecopperefectivelyimprovedthesuperhydrOph0bicityandretardedtheformationandgrowthoffrost.Moreimportantly,theseSUrfacesshowedalongdelayedicingtime,evenafterseveralheatingandcoolingcyclesdisplayinggoodresistancetofrostandicing.This
7、canbewellexplainedbyanunderstandingofclassicalnucleationtheo~,Browncoalescence,andone—dimensionalheatandmasstransport.KeyWords:Patternedstructure;Superhydrophobicity;Anti-icing;MasstranspoAationReceived:May19,2014;Revised:July22,20l4;Pu
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