超亲水和具有不同黏性的超疏水阳极氧化铝膜的制备  

Preparation of Superhydrophilic Anodized Aluminum Oxide Membrane and Superhydrophobic Anodized Aluminum Oxide Membrane with Different Adhesion

作　　者：商富强 黄丽清[1] 李刚 张宇[1] 蔡亚坤 王慧敏 董伟丽 张磊[1] 刘悠[1] SHANG Fuqiang;HUANG Liqing;LI Gang;ZHANG Yu;CAI Yakun;WANG Huimin;DONG Weili;ZHANG Lei;LIU You(Non-equilibrium Condensed Matter and Quantum Engineering Laboratory,the Key Laboratory of Ministry of Education,School of Science,Xi’an Jiaotong University,Xi’an 710049,China;Unit 63658 of PLA,Urumqi 841700,China)

机构地区：[1]西安交通大学理学院,物质非平衡合成与调控教育部重点实验室,西安710049 [2]中国人民解放军63658部队,乌鲁木齐841700

出　　处：《材料导报》2020年第10期10003-10007,共5页Materials Reports

基　　金：国家自然科学基金重大项目(61890961);陕西省科学技术研究发展计划(2020GY-274);国家自然科学基金面上项目(11774279)。

摘　　要：超亲水和超疏水表面在许多领域具有重要的应用价值。本工作对二步高场阳极氧化所制备的阳极氧化铝(AAO)膜进行了湿化学刻蚀及高温退火处理,研究了其表面浸润特性随后处理条件变化的特征。结果表明,AAO膜表面的水接触角(WCA)随着刻蚀时间的延长呈现先增大后减小最终趋于极小定值的变化规律;当刻蚀时间大于90 min时,AAO膜表面呈现出超亲水的特征(WCA<10°);刻蚀不同时间的AAO膜经过高温退火后其WCA均大于未经过高温退火的AAO膜,且WCA随着刻蚀时间的延长而增大,特别是刻蚀时间为120~180 min时,AAO膜为超疏水高黏性的,而刻蚀时间为200 min的AAO膜则为超疏水(WCA>150°)极低黏性的,其表面与水滴的平均接触时间只有4.6 ms;所制备的超疏水AAO膜具有很好的时间稳定性。本工作还对经后处理的AAO膜的浸润特性随后处理条件变化的机理进行了定性分析。这些研究结果为设计具有不同浸润特性的功能化固体表面提供了新的思路,具有很好的实际应用价值。Both superhydrophilic and superhydrophobic surfaces have great application value in many fields.In this article,anodized aluminum oxide(AAO)membranes prepared by two-step high-field anodizing were subjected to wet chemical etching and high-temperature annealing.The change of surface wettability characteristics with post-treatment conditions was studied.The results showed that,with the increase of etching duration,the water contact angle(WCA)of AAO membranes increased first and then decreased to a minimum fixed value.As the etching duration was more than 90 min,the etched AAO membranes showed superhydrophilic characteristic(WCA<10°).The WCA of AAO membranes etched at different time with high temperature annealing was larger than that without high temperature annealing,and the WCA increased with the increase of etching time.Especially when the etching time was 120—180 min,the AAO membranes were superhydrophobic and highly viscous.while the AAO membranes with etching time of 200 min showed extremely low superhydrophobic characteristic(WCA>150°)and ultralow viscosity,and the average contact duration between the AAO membranes surface and droplet was only 4.6 ms.The as-prepared superhydrophobic AAO membranes were of good time stability.Also the mechanism of the wettability of AAO membrane changing with post-treatment conditions was analyzed.The results obtained in this article provide a new idea for design functional solid surfaces with different wettability and have good practical application value.

关 键 词：表面浸润特性 阳极氧化铝膜 化学刻蚀 高温退火 超疏水 

分 类 号：TB304[一般工业技术—材料科学与工程]