Using an anti-icing coating to prevent ice accretion on the drill surface is a feasible solution to address the drilling difficulties in warm ice. In this study, four types of commercially available hydrophobic coating materials were tested to evaluate their water repellency and anti-icing properties, namely, a mixture of silica and fluorocarbon resin with polytrifluoroethylene, modified Teflon, silica-based emulsion and an acrylic-based copolymer. Their water contact angles are ~107°, 101°, 114° and 95°, respectively. All these hydrophobic coatings can significantly reduce the strength of the ice adhesion within a temperature range of −10 to −30°C on a planar or curved surface. The coating of an acrylic-based copolymer, in particular, can reduce the average tensile strength and the shear strength of the ice adhesion by 87.08 and 97.11% on planar surfaces at −30°C, and by 98.06 and 96.15% on a curved surface, respectively. The main challenge in the practical application of these coatings is their durability. An acrylic-based copolymer coating will lose its water repellency performance after 140 cycles of abrasion. The shear strength of ice adhered on curved surfaces coated with this material will approach that achieved on uncoated surfaces after 11 cycles of icing and de-icing tests.

中文翻译：

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冰芯钻探机电钻疏水材料的抗冰性能

使用防冰涂层防止钻头表面结冰是解决温冰钻探困难的可行方案。在这项研究中，测试了四种类型的市售疏水涂层材料，以评估它们的防水和防冰性能，即二氧化硅和氟碳树脂与聚三氟乙烯的混合物、改性聚四氟乙烯、二氧化硅基乳液和丙烯酸基共聚物。 . 它们的水接触角分别为~107°、101°、114°和95°。所有这些疏水涂层都可以在-10至-30°C的温度范围内显着降低平面或曲面上的冰粘附强度。特别是丙烯酸基共聚物的涂层可以使冰粘附的平均拉伸强度和剪切强度降低 87.08 和 97。在 -30°C 的平面上为 11%，在曲面上分别为 98.06 和 96.15%。这些涂层在实际应用中的主要挑战是它们的耐用性。丙烯酸基共聚物涂层在经过 140 次磨损循环后将失去其防水性能。经过 11 次结冰和除冰测试后，粘附在涂有该材料的曲面上的冰的剪切强度将接近未涂敷表面所达到的剪切强度。