接触角
材料科学
涂层
润湿
氢氧化钠
腐蚀
超疏水涂料
沉浸式(数学)
硬脂酸
蒸馏水
复合材料
合金
化学工程
氢氧化物
铝
塔菲尔方程
橙汁
冶金
色谱法
化学
纯数学
物理化学
工程类
电化学
数学
食品科学
电极
作者
Rafael Gleymir Casanova da Silva,Maria Isabel Collasius Malta,Lucas A.P. de Carvalho,Jedaías J. da Silva,Walter Leandro Cordeiro da Silva Filho,Sara Horácio de Oliveira,Edval Gonçalves de Araújo,Severino Leopoldino Urtiga Filho,Magda Rosângela Santos Vieira
标识
DOI:10.1016/j.surfcoat.2023.129293
摘要
This work seeks to develop a low-cost superhydrophobic coating on 5052 aluminum alloy using a combination of methods. First, top-down with acid etching with dilute HCl solution for a few minutes. Second, bottom-up by simple deposition of layered double hydroxide (LDH) film; Third, chemical modification of the surface with stearic acid. Through the applied methodology, it is possible to obtain superhydrophobic coatings with a contact angle of 164° and sliding angles of 1°. The obtained coating also shows high repellency and low sliding angle value for different commercial liquid foods such as orange juice, grape juice, chocolate milk, iced tea, isotonic, and cola-based soda. The Tafel method reveals that corrosion inhibition efficiency is 97.7 % and 97.4 % after 24 h of exposure in 0.6 mol/L NaCl solution and cola-based soda medium (pH = 2,5), respectively. The immersion test for 21 days (3 weeks) in distilled water and NaCl solution (0.6 mol/L) shows a change of the wettability characteristic on the coated specimens to hydrophobic and hydrophilic at the end of the experiment, respectively. Future work intends to incorporate harder particles that can further improve the mechanical durability of the LDH-based superhydrophobic coating, aiming at the application as food contact materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI