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采用激光加工在Ti6Al4V试样表面加工不同间距的点阵结构,采用自组装技术制备4种自组装分子膜。通过表面形貌和接触角的测量表征试样的表面特性。结果表明:通过激光点阵加工和沉积自组装分子膜,可显著增加Ti6Al4V试样的水接触角。长链分子FDTS、FOTS和OTS制备的自组装分子膜,使Ti6Al4V试样的接触角均大于150?,形成超疏水表面,其中沉积FDTS自组装分子膜时,试样的接触角最大,可达164.5?。沉积短链分子MPS自组装分子膜时,只有当激光加工间距为50μm时,试样方可形成超疏水表面;间距增大后,试样表面变成疏水表面。沉积4种自组装分子膜时,试样的接触角均随激光点阵加工间距的增大而减小。
Laser processing was used to fabricate lattice structures with different pitches on the surface of Ti6Al4V samples. Four self-assembled molecular films were prepared by self-assembly technique. The surface properties of the samples were characterized by measurements of surface topography and contact angle. The results show that the water contact angle of Ti6Al4V samples can be significantly increased by laser lattice processing and self-assembly of molecular films. The self-assembled molecular films prepared by long chain molecules FDTS, FOTS and OTS make the contact angles of Ti6Al4V samples larger than 150μm, forming a superhydrophobic surface. When FDTS self-assembled molecular films were deposited, the contact angles of the samples were the largest 164.5 ?. When MPS self-assembled molecular films were deposited, the superhydrophobic surface could be formed only when the distance between the laser processing steps was 50μm. After the spacing increased, the surface of the sample became a hydrophobic surface. When four kinds of self-assembled molecular films were deposited, the contact angles of the samples decreased with the increase of the distance between laser dots.