Thermally conductive superhydrophobic composite coatings with anti-corrosion property

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-11-07 DOI:10.1016/j.porgcoat.2024.108913

Guoyu Ren , Wenjie Zheng , Zeting Qiao , Yun Tuo , Xiaodong Chen , Qiang Zhao , Yajun Bi , Fangyan Du , Xianghu Gao , Shiying Li

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Abstract

The special wettability coating with self-cleaning and anti-corrosion performance can effectively solve the corrosion and coking problems of heat exchange tube, which has attracted much attention. In this work, hydroxylated boron nitride (OH-BNNS) was prepared from hexagonal boron nitride (H-BN) by liquid-phase exfoliation to improve the thermal conductivity. Different sizes of OH-BNNS, modified aluminum nitride (M-AlN) and polytetrafluoroethylene (PTFE) were added into the epoxy resin (EP) to obtain coating suspension, which was sprayed to successfully prepare M-AlN@OH-BNNS/EP superhydrophobic coatings with the thermal conductivity and anti-corrosion. The superhydrophobic coatings had thermal conductivity of 1.454 ± 0.001 W/(m·K), water contact angle (WCAs) of 160.7 ± 1.4° and water sliding angle (WSAs) of 3.3 ± 0.7°. Moreover, it had good adhesion (1 grade), excellent wear resistance (1000 cycles of sandpaper abrasion), self-cleaning and anti-fouling properties. More importantly, the electrochemical results indicated that the impedance modulus of the superhydrophobic coatings was 9.36 × 10¹⁰ Ω·cm² after soaking 3.5 wt% NaCl for 30 d, showing outstanding corrosion resistance. This study presented the application of superhydrophobic coatings in anti-corrosion and heat conduction.

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具有防腐蚀性能的导热超疏水复合涂料

具有自清洁和防腐蚀性能的特殊润湿涂层可有效解决热交换管的腐蚀和结焦问题，因而备受关注。本研究以六方氮化硼（H-BN）为原料，通过液相剥离法制备了羟基氮化硼（OH-BNNS），以提高其导热性能。在环氧树脂（EP）中加入不同尺寸的 OH-BNNS、改性氮化铝（M-AlN）和聚四氟乙烯（PTFE），得到涂层悬浮液，经喷涂成功制备出具有导热和防腐性能的 M-AlN@OH-BNNS/EP 超疏水涂层。超疏水涂层的导热系数为 1.454 ± 0.001 W/(m-K)，水接触角（WCAs）为 160.7 ± 1.4°，水滑动角（WSAs）为 3.3 ± 0.7°。此外，它还具有良好的附着力（1 级）、优异的耐磨性（1000 次砂纸磨损）、自清洁和防污性能。更重要的是，电化学结果表明，在浸泡 3.5 wt% 的 NaCl 30 d 后，超疏水涂层的阻抗模量为 9.36 × 1010 Ω-cm2，显示出卓越的耐腐蚀性。本研究介绍了超疏水涂层在防腐蚀和热传导方面的应用。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.