Superhydrophobic Anodized Fe Surface Modified with Fluoroalkylsilane for Application in LiBr–Water Absorption Refrigeration Process

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• 作者：Jian He ; Ming Mao ; Yuting Lu ; Wei JiangBin Liang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2017
• 出版时间：January 18, 2017
• 年：2017
• 卷：56
• 期：2
• 页码：495-504
• 全文大小：686K
• ISSN：1520-5045

文摘

LiBr refrigerating systems are frequently used in industry, but the pipelines are easily corroded or blocked by the LiBr solution with high flow resistance. Here, a superhydrophobic Fe surface was proposed and tested for applicability. After constructing a rough Fe₂O₃ nanotube array on a Fe surface by the anodization process, a superhydrophobic Fe surface was obtained by silane modification. The as-prepared superhydrophobic surface exhibited excellent repulsion to LiBr solutions. The modified Fe foil showed a 3.35% decrease in thermal conductivity but a 99.2% improvement of anticorrosion protection efficiency. LiBr crystals deposited on this surface were easily detached. The flow resistance along the superhydrophobic surface was reduced to 50% of that along a pure Fe surface. The operation temperature of the system was broadened due to low blockage risk. The excellent thermal conductivity, anticorrosivity, drag reduction, and antifouling performance of the superhydrophobic Fe surface exhibits promise for industrial application.