Fabrication of superhydrophobic PDMS/TiO2 composite coatings with corrosion resistance

IF 2.7 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Surface Innovations Pub Date : 2022-04-20 DOI:10.1680/jsuin.22.00013

Zhangyang Zhou, B. Ma, Xin Zhang, C. Deng, Shujie Yang, Chuanbo Hu

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引用次数: 2

Abstract

In this study, a combination of hydrothermal and sol-gel methods was used to prepare superhydrophobic polydimethylsiloxane (PDMS)/TiO2 composite coating with good self-cleaning properties and corrosion resistance. The structural, surface roughness and wettability behavior of the PDMS/TiO2 superhydrophobic coatings were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and contact angles measurements. Results showed that surfaces of composite coatings possessed rough hierarchical micro/nanostructures, especially, the surface water contact angle is as high as 160° and the sliding angle is less than 2.1° when the ratio of PDMS/TiO2 was 1:5. In addition, through a series of high-temperature exposure, acid-alkali resistance, self-cleaning, and electrochemical corrosion tests, it was also found that the superhydrophobic surface with a PDMS/TiO2 ratio of 1:5 had excellent properties, and showed certain practicability in terms of anticorrosion, antipollution and durability. Therefore, it can be concluded that this kind of corrosion resistant superhydrophobic PDMS/TiO2 composite coating with simple operation, high performance and multi-scale use on metal substrates has good application prospects in harsh environments.

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耐腐蚀超疏水PDMS/TiO2复合涂层的制备

本研究采用水热法和溶胶-凝胶法相结合的方法制备了具有良好自清洁性能和耐腐蚀性的超疏水聚二甲基硅氧烷（PDMS）/TiO2复合涂层。通过扫描电子显微镜（SEM）、傅立叶变换红外光谱（FTIR）、原子力显微镜（AFM）和接触角测量对PDMS/TiO2超疏水涂层的结构、表面粗糙度和润湿性进行了表征。结果表明，复合涂层表面具有粗糙的微米/纳米结构，尤其是当PDMS/TiO2的比例为1:5时，表面水接触角高达160°，滑动角小于2.1°。此外，通过一系列高温暴露、耐酸碱、自清洁和电化学腐蚀试验，还发现PDMS/TiO2比例为1:5的超疏水表面具有优异的性能，在防腐、防污和耐久性方面显示出一定的实用性。因此，可以得出结论，这种操作简单、性能高、可在金属基体上多尺度应用的耐腐蚀超疏水PDMS/TiO2复合涂层在恶劣环境中具有良好的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface Innovations CHEMISTRY, PHYSICALMATERIALS SCIENCE, COAT-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

5.80

自引率

22.90%

发文量

期刊介绍： The material innovations on surfaces, combined with understanding and manipulation of physics and chemistry of functional surfaces and coatings, have exploded in the past decade at an incredibly rapid pace. Superhydrophobicity, superhydrophlicity, self-cleaning, self-healing, anti-fouling, anti-bacterial, etc., have become important fundamental topics of surface science research community driven by curiosity of physics, chemistry, and biology of interaction phenomenon at surfaces and their enormous potential in practical applications. Materials having controlled-functionality surfaces and coatings are important to the manufacturing of new products for environmental control, liquid manipulation, nanotechnological advances, biomedical engineering, pharmacy, biotechnology, and many others, and are part of the most promising technological innovations of the twenty-first century.