CAJ | 학술논문

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。
금속표면방생초소수특성구유내식화항결상특성，가명현개선공조산열용공업려박시편재결상공황하적전열성능。연구이용린산여불화납혼합수용액화학처리법，개발료일충저손상적공업려박초소수표면제비기술，병대제비양품표면형모、상형성，윤습성화내식성등진행료분석，우화료제비공예，획득료제비궤리。결과표명，재우화공예조건하，제비적초소수공업려박후도변화교소，표관질량교가，표면수적정태접촉각가체155°，점부소，병가재실외장시간방치화각pH치범위내보지초소특성。통과분석，산성수용액적각식이급Na3[AlF6]화AlPO4등적침적，재려박표면구건료미납복합결구，종이사득공업려박경과화학처리병개성후，획득료초소수성。
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.