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A novel approach for the evaluation of ice release performance of coatings using static friction measurements
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2020-12-18 , DOI: 10.1007/s11998-020-00431-3
M. Martinsen , K. O. Hed , J. S. Diget , H. L. Lein

Atmospheric icing on structures and equipment represents a challenge for operation and safety. Passive ice removal by ice-phobic coatings has received much attention over the last decades. The current state-of-the-art methods for quantifying the ice-release properties of such coatings suffer from a range of drawbacks, including poor reproducibility and high complexity test setups. Here, a facile rotational tribometer approach for measuring the static friction between polymeric coatings and ice is presented. The torque necessary to initiate motion at the coating-ice interphase was used as a measure of ice release. For a polydimethylsiloxane-based coating (Sylgard 184), the effects of ice-temperature, normal force, coating thickness, and dwell time (contact time between coating and ice at rest with fully applied normal force prior to applying torque) were established along with the conditions resulting in least data variation. With these conditions, tribology-based friction measurements were carried out on two additional coatings; a two-component polyurethane, and a commercial foul release coating. The outcome of the method, i.e., grading of the coatings in terms of antiicing effect, matched those obtained with a widely used ice adhesion test method based on ice shear adhesion testing. The same trends are revealed by the two methods. However, the findings from the proposed tribology-based method result in consistently lower variation in outcomes and offer more detail on the ice adhesion and friction mechanisms.



中文翻译:

一种使用静摩擦测量评估涂料的冰释放性能的新方法

结构和设备的大气结冰是操作和安全的挑战。在过去的几十年中,通过疏冰涂层的被动除冰技术受到了广泛的关注。当前用于量化此类涂料的冰释放特性的最新技术方法存在一系列缺陷,包括重现性差和测试设置复杂性高。这里,提出了一种用于测量聚合物涂层与冰之间的静摩擦的简便的旋转摩擦计方法。在涂层-冰界面处开始运动所需的扭矩被用作冰释放的量度。对于基于聚二甲基硅氧烷的涂料(Sylgard 184),冰温,法向力,涂层厚度,确定保压时间(在施加扭矩之前,完全施加法向力之前,静止状态下涂层与冰之间的接触时间)以及导致数据变化最少的条件。在这些条件下,在另外两个涂层上进行了基于摩擦学的摩擦测量。两组分聚氨酯和工业污垢释放涂料。该方法的结果,即根据防冰效果对涂层进行分级,与基于冰剪切粘附力测试的广泛使用的冰粘附力测试方法所获得的结果相匹配。两种方法揭示了相同的趋势。但是,从基于摩擦学的方法中得出的结果导致结果的偏差始终较小,并提供了有关冰附着和摩擦机理的更多详细信息。

更新日期:2020-12-18
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