表面膜对点阵结构Ti6Al4V表面超疏水特性的影响

Effects of Surface Film on Superhydrophobic Characteristics of Ti6Al4V with Dotted Matrix Structure

摘要:

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50 μm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

Abstract:

The dotted matrix structures on Ti6Al4V specimens with different spacing were manufactured by laser technology. Four kinds of self-assembled monolayers (SAMs) were prepared on the above Ti6Al4V substrates by self-assembled technique. The surface characteristics of Ti6Al4V specimens were characterized with topography and contact angle measurement. The results show that the water contact angles of the Ti6Al4V specimens increase significantly by dotted matrix structure manufacturing and SAMs deposition. The contact angles of the Ti6Al4V specimens deposited with long chain molecules of FDTS, FOTS and OTS are larger than 150° and the superhydrophobic surfaces are formed. The maximum contact angle of 164.5° can be acquired when FDTS SAMs are deposited on the Ti6Al4V specimens. The superhydrophobic surface of the Ti6Al4V specimens can be formed for short chain MPS molecule deposition only when the spacing of laser manufacturing is set to 50 μm. The superhydrophobic surface will change to the hydrophobic surface with spacing increasing. The contact angles of the Ti6Al4V specimens for all four SAMs deposition reduce with increasing of the spacing of dotted matrix