【摘要】 基于二次阳极氧化法制备的多孔阳极氧化铝(AAO)有序阵列薄膜,研究了二次蒸馏水和1,2-二氯乙烷两种液体在该结构化、化学异质表面的润湿特性。研究结果表明,随着纳米孔径的增加,两种测液在其表面的接触角均不断增大。采用Owens二液法和Yang氏孔径法对AAO表面能构成的分析发现,在AAO表面能的构成中,表面微纳结构项的贡献约占90%,而表面化学成分的贡献约占10%。显然,纳米孔径的增加导致了其AAO薄膜表面能明显的降低,从而改变了其表面润湿特性。这对于深入理解由表面微纳结构和表面化学成分协同诱导的润湿机制是十分有益的。更多还原

【Abstract】 Based on anodic aluminum oxide(AAO) films with ordered nanopore arrays prepared by using an electrochemical two-step anodization method,the wettability of these structured and chemically heterogeneous surfaces was studied via employing bidistilled water and 1,2-dichloroethane as testing liquid.It is indicated that,with increase of nanopore diameter,contact angles of the two kinds of liquid are increased gradually.Using Owens′s and Yang′s methods,the composition of solid surface energy for AAO film was analysed.It is found that the contributions of surface nanostructure and surface chemical component are about 90% and 10% respectively.Obviously,the increased nanopore diameter leads to change surface energy,further obtains the variation in wettability.This work is very beneficial to understand the wetting mechanism induced cooperatively by nanostructure and chemical component.更多还原