激光加工结合自组装制备铝合金超疏水表面

Preparation of Superhydrophobic Surface on Aluminum Alloy Based on Laser Manufacturing and Self- Assembled Method

通过激光加工在铝合金表面构造出具有规则结构的微米级纹理结构,再利用5种有机硅烷试剂分别对该表面进行修饰改性,以期制备得到超疏水表面。采用三维形貌仪、扫描电镜、接触角测量仪等评价制备表面的形貌结构和润湿性。结果表明,试样表面的微米级纹理结构和自组装分子膜均对试样的润湿性具有重要影响;不同有机硅烷改性修饰微米级纹理结构后的表面对水接触角存在明显差异,最大接触角可达160°。制备的超疏水表面对不同p H值的水滴均呈现超疏水性,且在大气环境下具有较好的耐久性。

Micron scale rough structures on aluminum alloy substrate were acquired by laser manufacturing. Five self-assembled monolayers （SAMs） of organosilane were prepared on texturing surface by self-assembled method. Surface profiler, scanning electron microscope and contact angle measurement were used to analyse the surface properties, and wettability of specimens. The results indicate that microstructures by laser manufacturing and SAMs play an important role in preparing superhy- drophobic surface. Contact angles of the water droplet on substrates prepared by different organosilane are significantly different. The maximum contact angle of 161° is acquired when organosilane is FDTS. The duplex-treated films acquired under this condition show superbydrophobicity to water droplets with different pH values. The films also possess good durability in air.