铝基微纳米结构超疏水表面制备及其防冰/霜性能
Fabrication of aluminum-based superhydrophobic surface with micro/nano-structure and its anti-icing/frost properties
钟涛 1刘超 1张艳梅 1杨晚生2
作者信息
- 1. 广东工业大学材料与能源学院,广东 广州 510006
- 2. 广东工业大学土木与交通工程学院,广东 广州 510006
- 折叠
摘要
[目的]在铝上构建具有粗糙微纳米结构的超疏水表面,可赋予其良好的防冰/霜性能.但在实际应用中铝的超疏水性会逐渐变差甚至失效,微纳米结构的稳定性是影响疏水耐久性的主要因素之一.[方法]先通过二次阳极氧化在铝表面制备纳米多孔结构,再用不锈钢筛网模板压印的方法在铝表面获得微米级结构,扩孔处理后采用低表面能物质(如三乙氧基-1H,1H,2H,2H-十三氟代正辛基硅烷)进行修饰,最终获得了微纳米结构的铝基超疏水表面(标记为MN-SHS),并就其表面形貌、水接触角、液滴粘附性、防冰/霜性能和耐久性与只进行二次阳极氧化的铝试样和进行二次阳极氧化+扩孔的铝试样作对比.[结果]MN-SHS样品表面的水接触角达到164°,液滴粘附性低,防冰/霜性能和耐久性最优.[结论]采用阳极氧化结合微米压印技术可制得具有微纳米复合结构的铝基超疏水表面,在防冰/霜方面具有很好的应用前景.
Abstract
[Introduction]It is an efficient method to endow aluminum an excellent anti-icing/frost performance by fabricating a superhydrophobic surface with micro/nano-structures.However,the superhydrophobicity of such aluminum surface often becomes worse gradually or even loses during practical application.The stability of micro/nano-structure is one of the important factors influencing the durability of superhydrophobicity.[Method]An aluminum-based superhydrophobic surface with micro/nano-structures(coded as MN-SHS)was fabricated as follows:1)conducting two-step anodization on aluminum to form a nanoporous structure on its surface;2)imprinting with a stainless steel mesh template to form a microstructure;3)pore widening;and 4)modification with a low-surface-energy compound such as 1H,1H,2H,2H-perfluorooctyltriethoxysilane.The surface morphology,water contact angle,adhesion to water droplet,anti-icing/frost properties,and durability of MN-SHS were compared with those of the aluminum just treated by two-step anodization and the aluminum treated by two-step anodization and pore widening.[Result]The MN-SHS featured a water contact angle of 164°,low adhesion to water droplet,as well as the best anti-icing/frost properties and durability.[Conclusion]An aluminum-based superhydrophobic surface with micro/nano-structures can be obtained by anodic oxidation in combination with micro-imprinting,which has a good application potential in the field of anti-icing/frost.
关键词
铝/超疏水/防冰/霜/阳极氧化/压印/微纳米结构/低液滴粘附性Key words
aluminum/superhydrophobicity/anti-icing/frost/anodic oxidation/imprinting/micro/nano-structure/low adhesion to droplet引用本文复制引用
基金项目
国家重点研发项目(2016YFE0133300)
广东省科技计划项目(2015A010105027)
出版年
2024
NETL
NSTL
万方数据