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Durable Superhydrophobic Coatings for Icephobic Applications

机译:耐用的超疏水性涂料,用于憎冰性应用

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Recent studies related to the application of superhydrophobic surfaces for anti-ice properties demonstrated that ice adhesion strength is reduced significantly compared to bare aluminum surfaces, but these surfaces lack durability. In this work, bottom up cost-effective and durable coatings were synthesized using silica nanoparticles for roughness control, flourosilane for hydrophobic chemistry, and three binding polymers: urethane acrylate, ethyl 2-cyanoacrylate, and epoxy. The polymer-to-silica nanoparticle ratio was studied to optimize coating's roughness for all the three polymers. The effect of substrate wetting on the superhydrophobic characteristics of the coatings was also investigated. Morphology was examined using scanning electron microscopy and contact profilometry, whereas durability was evaluated using the tape test (ASTM D3359). Wetting these novel coatings under freezing conditions for different periods of time exhibited measured contact angles of > 160° and sliding angles of < 1°, indicating that the coatings were icephobic.
机译:最近有关将超疏水表面用于防冰性能的研究表明,与裸露的铝表面相比,冰的粘附强度显着降低,但这些表面缺乏耐久性。在这项工作中,使用了用于控制粗糙度的二氧化硅纳米粒子,用于疏水化学的氟硅烷和三种粘合聚合物(聚氨酯丙烯酸酯,2-氰基丙烯酸乙酯和环氧树脂)合成了自下而上的经济高效且耐用的涂料。研究了聚合物与二氧化硅的纳米粒子比率,以优化所有三种聚合物的涂层粗糙度。还研究了基材润湿对涂层超疏水特性的影响。使用扫描电子显微镜和接触轮廓仪检查形态,而使用胶带测试(ASTM D3359)评估耐久性。在冷冻条件下将这些新型涂料在不同的时间段内润湿后,测得的接触角> 160°,滑动角<1°,表明该涂层具有疏冰性。

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