X52管线钢仿生超疏水表面的制备  

Fabrication of bionic superhydrophobic surface on X52 pipeline steel

作　　者：于思荣[1] 刘家安[2] 刁伟[2] 

机构地区：[1]中国石油大学(华东)机电工程学院,青岛266580 [2]吉林大学材料科学与工程学院,汽车材料教育部重点实验室,长春130025

出　　处：《科学通报》2014年第3期273-278,共6页Chinese Science Bulletin

基　　金：国家自然科学基金(51075184;51201068);教育部中央高校基本科研业务费专项资金(11CX05003A)资助

摘　　要：采用喷砂毛化处理、化学刻蚀和氟化处理复合法在X52管线钢表面成功地制备了超疏水表面.十七氟癸基三乙氧基硅烷(HFTTMS)对其表面进行低能化修饰.研究了化学刻蚀液浓度、化学刻蚀时间对管线钢表面形貌及表面与水的润湿行为的影响.结果表明,在一定的盐酸浓度下,随着化学刻蚀时间的延长,管线钢表面与水的接触角增大;然而当化学刻蚀时间过长,管线钢表面与盐酸反应过久,表面微结构的复杂程度减小,接触角将减小.随盐酸浓度的升高,管线钢表面与盐酸反应变得剧烈,表面微观形貌变得复杂,分形维数增大.当盐酸浓度过高时,表面微细凸起结构又被腐蚀掉,导致表面复杂程度降低,分形维数下降,与水的接触角随之减小.试样在7 mol/L的盐酸中刻蚀1.5 h后,喷砂毛化管线钢表面能获得最佳的表面复合结构,经氟化处理后,与水接触角为156.4°,获得良好的超疏水性.A superhydrophobic surface was prepared successfully on X52 pipeline steel surface using the sandblasting roughening treatment, chemical etching and fluorination treatment composite methods. The pipeline steel surface was modified with （heptadecafluoro-1,1,2, 2-tetradecyl）trimethoxysilane （HFTTMS）. The effects of HC1 concentration and the chemical etching time on the morphology of the pipeline steel surface and the wettability of the surface with distilled water were researched. The results show that at certain HC1 concentration, with the increase of the chemical etching time, the contact angles increased and had a maximum value. When the chemical etching time was too long, the pipeline steel surface reacted with HC1 for too long, and the complexity of surface microstructure decreased, resulting in the decrease of the contact angle. With the increase of HC1 concentration, the reaction between the pipeline steel surface and HC1 became severe, the surface morphology became more complex, and the fractal dimension increased. When HC1 concentration was too high, the surface fine projection structures were etched off, resulting in the decreases in the complexity and the fractal dimension of the surface structures. Therefore, the contact angle decreased. The sample sandblasted for 1.5 min and etched chemically for 1.5 h at 7 mol/L HC1 can obtain the best surface fine structure. After the fluorination treatment, the biggest contact angle is 156.4°.

关 键 词：喷砂毛化 化学刻蚀 氟化处理 管线钢 超疏水表面 

分 类 号：TG174.4[金属学及工艺—金属表面处理]