Preparation and characterization of hydrogen-containing silicone oil-modified polyurethane/Al composite coating with low-infrared emissivity

IF 2.3 4区 材料科学 Q2 Chemistry
Weigang Zhang, Si Xiong, Dandan Lv
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引用次数: 3

Abstract

The goal of this research was to obtain a coating with low-infrared emissivity and both good hydrophobic and mechanical properties. Using nano-SiO2 as the micro-nano structural modifier, a hydrogen-containing silicone oil (HCSO)-modified polyurethane (PU)/Al composite coating with super-hydrophobicity and low-infrared emissivity was prepared via a simple glass rod scraping method. Effects of the ratio of HCSO to PU, the total filler addition, and the ratio of Al powder and nano-SiO2 on the coating properties are systematically discussed. The results show that as the ratio of HCSO to PU increases, the surface energy of the coating decreases, and this significantly increases the hydrophobicity of the coating. When the ratio is 2:8, the coating has outstanding hydrophobic properties, the adhesion strength of the coating reaches grade 1, and the water contact angle (WCA) reaches 152°. The total filler addition has a significant impact on the coating performance. With an increase in the filler addition, the emissivity of the coating increases, and the glossiness decreases. When the total filler addition is 50 wt%, the coating surface forms an obvious papillary micro-nano rough structure, so that the coating has outstanding hydrophobic properties. The ratio of Al powder to nano-SiO2 obviously affects the emissivity and hydrophobic properties of the coating. When the ratio is 5.5:4.5, the coating has good overall performance. At this point, the emissivity of the coating is as low as 0.675; the glossiness and adhesion strength are 2.7 and grade 1, respectively; the WCA and sliding angle are 155° and 8°, respectively; and it has outstanding self-cleaning performance. Through the research in this paper, a low-infrared emissivity coating with outstanding super-hydrophobic properties and adhesion strength has been obtained and has important application value in the design and transformation of infrared stealth of various equipment.

Abstract Image

低红外发射率含氢硅油改性聚氨酯/铝复合涂层的制备与表征
本研究的目的是获得一种具有低红外发射率,同时具有良好疏水性和机械性能的涂层。以纳米sio2为微纳结构改性剂,采用简单的玻璃棒刮削法制备了超疏水性、低红外发射率的含氢硅油(HCSO)改性聚氨酯(PU)/铝复合涂层。系统地讨论了HCSO与PU的配比、填料总添加量、Al粉与纳米sio2的配比对涂层性能的影响。结果表明,随着HCSO与PU配比的增加,涂层的表面能降低,涂层的疏水性显著提高。当比例为2:8时,涂层具有优异的疏水性,涂层的附着强度达到1级,水接触角(WCA)达到152°。填料总添加量对涂层性能有显著影响。随着填料添加量的增加,涂层的发射率增加,光泽度降低。当填料总添加量为50 wt%时,涂层表面形成明显的乳头状微纳粗糙结构,使涂层具有优异的疏水性。铝粉与纳米sio2的比例对涂层的发射率和疏水性有明显影响。当比例为5.5:4.5时,涂层具有良好的综合性能。此时涂层的发射率低至0.675;光泽度2.7,附着力1级;WCA为155°,滑动角为8°;具有优异的自清洁性能。通过本文的研究,获得了一种具有优异的超疏水性和粘附强度的低红外发射率涂层,在各种装备红外隐身的设计和改造中具有重要的应用价值。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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