(大連海事大學(xué) 交通運(yùn)輸裝備與海洋工程學(xué)院，大連 116026)
摘 要: 為制備具有更高機(jī)械強(qiáng)度和更長使用壽命的超疏水金屬表面，利用激光加工技術(shù)在鋁鎂合金表面構(gòu)建出圓臺凸起、圓臺凹坑和正四棱臺3種微結(jié)構(gòu)。利用自組裝技術(shù)在具有以上3種微結(jié)構(gòu)的鋁鎂合金表面沉積自組裝分子膜(SAMs)，采用掃描電鏡、形貌分析儀和接觸角測量儀對成膜后的鋁鎂合金表面進(jìn)行形貌和接觸角的表征與測量。結(jié)果表明：沉積疏水的FDTS和OTS自組裝分子膜時(shí)，接觸角隨微結(jié)構(gòu)間距的增大而減小，隨微結(jié)構(gòu)高度的增大而增大，最大接觸角達(dá)156°，形成超疏水鋁鎂合金表面；沉積親水的APS自組裝分子膜時(shí)，接觸角隨微結(jié)構(gòu)間距的增大而增大，隨微結(jié)構(gòu)高度的增大而減小，最小接觸角接近0°，形成超親水鋁鎂合金表面；激光加工和自組裝技術(shù)可以大幅度改變鋁鎂合金的表面潤濕性。
關(guān)鍵字: 鋁鎂合金；微結(jié)構(gòu)；接觸角；激光加工；自組裝分子膜
（College of Transportation Equipment and Ocean Engineering, Dalian Maritime University, Dalian 116026, China）
Abstract:In order to prepare super-hydrophobic metal surface with higher mechanical intensity and longevity of service, three surface textures including frustum of a cone, notch of taper hole and frustum of a pyramid, were manufactured on Al-Mg alloy with laser surface modification method, and the self-assembled monolayers (SAMs) was deposited on the textured surface with self-assembled method. Scanning electron microscopy, surface profiler and contact angle measurement were used to analyze the surface properties of specimens. The results show that after laser manufacturing and preparing hydrophobicity FDTS and OTS self-assembled monolayers, the contact angles tend to smaller as the increment of the spacing of surface texture, and tend to bigger as the increment of the height of surface texture. Maximum contact angle of 156° and the super-hydrophobic surface can be acquired. After laser manufacturing and preparing hydrophilic APS self-assembled monolayers, the contact angles tend to bigger as the increment of the spacing of surface texture, and tend to smaller as the increment of the height of surface texture. Minimum contact angle of 0° or so and the super-hydrophilic surface can be obtained. The wettability of aluminum-magnesium alloy surface can be adjusted by laser surface modification method and self-assembled monolayers.
Key words: Al-Mg alloy; texture; contact angle; laser modification; self-assembled monolayers
