通过使用石墨烯(G)和炭黑(CB)共同构建输电线表面的微/纳米粗糙结构,同时引入非氟的正辛基三乙氧基硅烷(OTES)作为低表面能物质以赋予碳颗粒表面疏水基团,采用喷刷结合的方法在输电线表面制备得到G/CB@OTES超疏水防覆冰涂层。通过研究不同浓度的G/CB对输电线涂层的微观形貌以及润湿性的影响,确定了最佳掺入浓度。利用扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)对输电线涂层的形貌和化学键合进行了表征,并开展了接触角测试、光热性能测试、防冰测试、除冰测试和机械耐久性测试等实验,综合评估了光热超疏水涂层的防冰和除冰性能。结果表明:输电线光热超疏水涂层的接触角高达158.3°±3.6°,滑动角低至4.6°±1.5°,可将结冰时间延长至61min。此外,在模拟阳光照射下,输电线涂层表面温度在10min内迅速升高至98.5℃,并能在151s内使冻结液滴融化。上述结果证实了光热超疏水涂层在输电线表面的应用可以实现高效的防冰/除冰,为其在输电工程防覆冰领域的应用提供了重要的参考依据。
Graphene (G) and carbon black (CB) were used to jointly construct micro/nano rough structures on the surface of transmission lines,while non-fluorinated n-octyltriethoxysilane (OTES) was introduced as a low-surface-energy substance to endow the surface of the carbon particles with hydrophobic groups,and G/CB@OTES superhydrophobic anti-icing coatings were prepared on the surfaces of the transmission lines by the spray-brush combination method.By studying the effect of different concentrations of G/CB on the micromorphology and wettability of the coatings,the optimal doping concentration was determined.The morphology and chemical bonding of the coatings on transmission lines were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR).Contact angle testing,photothermal performance testing,anti-icing testing,de-icing testing,and mechanical durability testing were conducted to comprehensively evaluate the anti-icing and de-icing performance of the photothermal superhydrophobic coatings.The research results showed that the contact angle of the photothermal superhydrophobic coatings on transmission lines was as high as 158.3°±3.6°,and the sliding angle was as low as 4.6°±1.5°,which could extend the freezing time to 61 minutes.In addition,under simulated sunlight exposure,the surface temperature of the coatings on the transmission lines rapidly increased to 98.5℃ within 10 minutes,and was able to melt the frozen droplets within 151s.The above results confirmed that the application of photothermal superhydrophobic coatings on the surface of transmission lines could achieve efficient anti-icing/de-icing and provide an important reference for their application in the field of anti-icing in transmission engineering.
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基金资助
中国石油大学(华东)自主创新科研计划项目(24CX03014A)
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