摘要
金属表面仿生超疏水特性具有耐蚀和抗结霜特性,可明显改善空调散热用工业铝箔翅片在结霜工况下的传热性能。研究利用磷酸与氟化钠混合水溶液化学处理法,开发了一种低损伤的工业铝箔超疏水表面制备技术,并对制备样品表面形貌、相形成,润湿性和耐蚀性等进行了分析,优化了制备工艺,获得了制备机理。结果表明,在优化工艺条件下,制备的超疏水工业铝箔厚度变化较小,表观质量较佳,表面水滴静态接触角可达155°,黏附小,并可在室外长时间放置和各pH值范围内保持超疏特性。通过分析,酸性水溶液的刻蚀以及Na3[AlF6]和AlPO4等的沉积,在铝箔表面构建了微纳复合结构,从而使得工业铝箔经过化学处理并改性后,获得了超疏水性。
Bionic superhydrophobic properties of metal surfaces show anti-corrosive and anti-frosting properties, which can significantly enhance heat transfer of industrial aluminum foil in frosting condition. In this paper, a low-damage method for fabricating superhydrophobic surface of industrial aluminum foil was developed, by using an aqueous solutions mixture of phosphoric acid and sodium fluoride. The fabrication parameters were optimized by analyzing the surface morphology, the phase formation, the wetting and corrosion resistance properties of the prepared samples, and finally the preparation mechanism was obtained. The results show that, with the optimized fabrication process, the thickness of superhydrophobic aluminum foil changes little and performs well. The prepared surfaces show superhydrophobic properties with a water contact angle of up to 155°, low adhesion, and good durability under outdoor condition. What＇s more, this kind of superhydrophobicity accommodates to a series of pH values. According to the analysis, etching of acid aqueous and deposition of Na3[AlF6] and AlPO4 construct micro-nano composite structure on aluminum foil surface, and that grant industrial aluminum foil superhydrophobicity.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第1期130-136,共7页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(51101035
51106023)
江苏省自然科学基金(BK2011255)
高等学校博士学科点专项科研基金(20110092120066)
关键词
工业铝箔
超疏水
低损伤
化学刻蚀
industrial aluminum foil
superhydrophobicity
little damage
chemical etchment
