CAJ | 학술논문

鉴于金属铝表面存在微米级的晶界和纳米级的位错,在外加电场和电解液的作用下,晶界位错处因具有更高的位能会使得阳极优先溶解,进而形成微纳米结构相结合的粗糙表面,提出一种新的铝基超疏水表面的电化学制备方法,实验研究了其加工质量、加工效率和加工条件之间的关系,结果显示电化学加工方法能够在铝基底上制备出多阶层微/纳米结构,可用作超疏水表面基底。电化学加工比化学刻蚀法有更好的可控性,同时比光刻等方法更经济。所加工表面经过低表面能材料修饰后呈现超疏水的特性,与水滴的接触角达到167°,滚动角小于3°。
감우금속려표면존재미미급적정계화납미급적위착,재외가전장화전해액적작용하,정계위착처인구유경고적위능회사득양겁우선용해,진이형성미납미결구상결합적조조표면,제출일충신적려기초소수표면적전화학제비방법,실험연구료기가공질량、가공효솔화가공조건지간적관계,결과현시전화학가공방법능구재려기저상제비출다계층미/납미결구,가용작초소수표면기저。전화학가공비화학각식법유경호적가공성,동시비광각등방법경경제。소가공표면경과저표면능재료수식후정현초소수적특성,여수적적접촉각체도167°,곤동각소우3°。
A new method of fabrication superhydrophobic surface by means of ECM was developed.The fabrication mechanism was based on the fact that the grain boundaries/dislocations were micro/nano-scale and more likely to be anodic dissolved than that of grain self,so the multi-scale micro/nano-structures surface can be generated by an applied electric field and the chemical solution.The relationship among processing quality,efficiency and conditions was studied in experiments herein.The results show that ECM can be used to fabricate dual-scale micro/nano-structures on aluminum surfaces,and further applied to generate the large size of superhydrophobic surface.The method is easier to control the reaction process than chemical etching meanwhile more economical than other techniques.After modified with low surface energy materials,the surface exhibits superhydrophobic property with water contact angle of 167° and tilt angle less than 3°.