条纹表面不仅可用于物体表面的散热、疏水,还可用于各类航行体表面的减阻.在亲水性金属表面直接构造出疏水条纹表面的研究较少.采用电脑精雕工艺,在亲水性LY12铝合金表面加工了间距等于槽深、几何尺寸分别为0.15mm和0.2mm的单向平行A型条纹.条纹与其表面不规则粗糙结构共同构成了类荷叶表面的双重微结构.采用座滴法在光学显微镜下测试了条纹表面的疏水性.实验得出,淡水在间距为0.15mm的A型条纹表面的正/侧面表观接触角为111±2°/85±2°,相应地0.2mm△型条纹为133±2°/77±2°;盐水在间距为0.2mm的A型条纹表面的正/侧面表现接触角为139±2°/92士2°.解释了条纹表面液滴呈半椭球状,液滴的接触存在各向异性的现象.
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