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采用激光刻蚀技术在钛合金表面分别构筑网格、直线、点阵3种微结构,采用溶胶-凝胶法将纳米SiO2粒子涂覆在微结构上,制备分别具有微结构/微纳结构的疏水/超疏水表面.利用小球藻附着面积评价表面的抗海洋生物附着性能,利用动态冲刷实验评价小球藻的附着强度.结果显示:具有微结构的疏水/超疏水表面符合Wenzel模型,具有微纳结构的超疏水表面符合Cassie模型,且其表面抗附着性能更优,附着强度更小;网格表面的超疏水自清洁性能最强,抗附着性能最优,附着强度最小,其次是直线,再次是点阵;随着微结构间距的增大,接触角减小,滚动角增大,抗附着性能降低,附着强度增大.
Three kinds of microstructures, such as grid, line and lattice, were fabricated on the surface of titanium alloy by laser etching. The nano-SiO2 particles were coated on the microstructure by sol-gel method, and the microstructures Hydrophobic / superhydrophobic surface.Using the attachment area of chlorella to evaluate the anti-marine biological adhesion performance of the surface, the dynamic erosion test was used to evaluate the adhesion strength of chlorella.The results showed that the hydrophobic / superhydrophobic surface with microstructure accords with Wenzel model, The superhydrophobic surface of the micro / nano structure conforms to the Cassie model and has better surface anti-adhesion property and less adhesion strength. The superhydrophobic surface of the mesh has the strongest self-cleaning property, the best anti-adhesion property and the least adhesive strength, , Again lattice; With the increase of microstructure spacing, the contact angle decreases, the rolling angle increases, the anti-adhesion performance decreases, the adhesion strength increases.