氟化改性硅樹脂制備的超疏水涂層防覆冰性能

翟廣坤; 李曙林; 陳素素; 尚柏林

doi:10.13374/j.issn2095-9389.2018.07.013

氟化改性硅樹脂制備的超疏水涂層防覆冰性能

doi: 10.13374/j.issn2095-9389.2018.07.013

1) 空軍工程大學航空工程學院, 西安 710038
2) 山東大學材料科學與工程學院, 濟南 250000

基金項目:

國家自然科學基金資助項目(71501185)

詳細信息

中圖分類號: V255.1
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出版歷程
- 收稿日期: 2017-12-11

Anti-icing performance of superhydrophobic coating prepared by modified fluorinated silicone

1) Aeronautics Engineering College, Air Force Engineering University, Xi'an 710038, China
2) School of Material Science & Engineering, Shandong University, Jinan 250000, China

摘要

摘要: 研究具有超疏水表面特性的疏水涂層實際防覆冰效果.首先理論分析了水滴在固體表面浸潤性影響因素,利用不同硅烷水解縮合反應制備出低表面能的含氟硅樹脂,之后引入分形理論在含氟硅樹脂中添加二氧化硅微粒制備疏水涂層.觀察摻雜微粒的涂層表面微觀結構,并測試水滴在不同涂層表面的接觸角;為直觀分析涂層防覆冰效果,將不同涂層涂覆試驗件后在結冰風洞中進行覆冰測試.結果顯示摻混不同量級微粒的疏水涂層表面形成復合粗糙結構,有著更好的粗糙度;含氟硅樹脂表面水滴接觸角較普通硅樹脂提升10°,含有不同量級粒徑微粒的涂層表面水滴接觸角較單一粒徑微粒摻混的涂層提升近20°,達到超疏水表面效果;具有復合微觀結構的疏水涂層涂覆的試驗件在5 m·s^-1和15 m·s^-1的風速下較無涂層表面覆冰減少率分別達到35.6%和25.9%,較只有一級粗糙結構的表面有效防覆冰時間長,具有較好的防覆冰能力.結果表明本文設計的超疏水涂層達到超疏水表面效果,且具有較好的防覆冰性能.
- 硅樹脂 /
- 氟化 /
- 超疏水 /
- 分形 /
- 接觸角 /
- 防覆冰
Abstract: This paper investigates the anti-icing effect of hydrophobic coating, which has similar characteristics with a superhydrophobic surface. First, the factors affecting the wettability of water droplets on a solid surface were theoretically analyzed. Using hydrolytic condensation reaction, low-surface-energy materials were prepared based on a modified vulcanized silicone resin. Different sizes of silica particles were added in a fluorinated silicone resin to prepare the superhydrophobic coatings, considering the fractal theory. In the coating test characterization phase, the microstructure of the particles-doped coating surface and the contact angle of water droplets on different coating surfaces were investigated and analyzed. To visually analyze the effect of coating anti-icing property, icing tests were carried out in an icing wind tunnel after coating the test pieces by different coatings. The results show that the surface of the hydrophobic coating mixed with particles of different sizes forms a composite microstructure, which has a better roughness. The contact angle test result shows that the contact angle of water droplets on the fluorinated silicone resin-coated surface is 10° higher than that on the ordinary silicone resin-coated surface, and increases by nearly 20° in the coating with different particle sizes compared with the uniformly sized particles coating, thus achieving a superhydrophobic surface effect. The different coated test pieces were set in an icing wind tunnel to test their anti-icing abilities, and the results indicate that the superhydrophobic coating with a fractal structure after being cured does not only have a lower icing weight, which is reduced by 35.6% and 25.9% at the wind speed of 5 m·s^-1 and 15 m·s^-1, respectively, compared with the uncoated surface, but also has longer anti-icing effect than the uniformly rough surface. Therefore, the designed superhydrophobic coating has an outstanding anti-icing ability. In conclusion, the designed superhydrophobic coating achieves a superhydrophobic surface and has a better anti-icing performance, as confirmed through a series of performance tests.
- silicone /
- fluorination /
- superhydrophobicity /
- fractal /
- contact angle /
- anti-icing

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參考文獻(8)

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