Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, 01069, Dresden, Germany.
J Mater Sci Mater Med. 2010 Feb;21(2):525-32. doi: 10.1007/s10856-009-3908-9. Epub 2009 Oct 23.
The effect of two different etching procedures with inorganic acids (HSE and CSE)-one using additionally strongly oxidising conditions due to the presence of CrO(3) (CSE)-and consecutive storage conditions (dry methanol and air) for previous corundum blasted titanium surfaces is compared with respect to their wettability behaviour and the potential of the etching processes for removing remaining blasting material. The etching procedures result in distinct different surface morphologies. Whereas the HSE surface shows sub-mm to sub-mum structures but neither porosity nor undercuts, the CSE surface is extremely rugged and porous with structures protruding the more homogeneously attacked areas by several micrometers. By EDX analysis both remaining blasting material and chromium and sulphur from the etching treatment has been detected on the CSE surfaces only. Both surfaces states show super-hydrophilic behaviour immediately after etching and storage up to 28 days in dry methanol. Whereas contact with air does not change super-hydrophilicity for the CSE samples, wettings angles of the HSE samples increase within minutes and reach about angles of about 60 degrees and 90 degrees after one and 2 days exposure to air, respectively. The increasing hydrophobicity is discussed with respect to the formation of a surface coverage from hydrocarbons originating from aromatic compounds present in traces in air.
两种不同无机酸蚀刻工艺（HSE 和 CSE）的效果对比，其中一种工艺（CSE）由于存在 CrO3，因此具有更强的氧化条件，随后对先前经过氧化铝喷砂处理的钛表面进行储存条件（干燥甲醇和空气）的对比，主要比较其润湿性行为和蚀刻工艺去除残留喷砂材料的能力。蚀刻工艺会导致明显不同的表面形貌。HSE 表面呈现亚毫米至亚微米结构，但既没有孔隙也没有凹陷，而 CSE 表面则非常粗糙且多孔，结构突出，均匀攻击区域几微米。通过 EDX 分析，仅在 CSE 表面检测到残留的喷砂材料和来自蚀刻处理的铬和硫。两种表面状态在蚀刻和储存后立即表现出超亲水性，在干燥甲醇中可长达 28 天。然而，与空气接触不会改变 CSE 样品的超亲水性，而 HSE 样品的润湿角在几分钟内增加，并在暴露于空气 1 天和 2 天后分别达到约 60 度和 90 度左右。这种疏水性的增加与源自空气中痕量存在的芳香族化合物的碳氢化合物形成表面覆盖层有关。
