In this paper, magnesium oxychloride cement (MOC), which has a needle-like structure, is upgraded with super-hydrophobic surface using a facile method involving immersion in a FAS-ethanol solution. The influence of the molar ratios of the raw materials on the super-hydrophobic property was investigated. The phase compositions, microstructure, compressive strength, water resistance and wetting behaviour are studied in detail by X-Ray diffraction, scanning electron microscopy, a water contact angle measurement instrument, and mechanical testing. The water contact angle of as-prepared MOC reaches 152 ± 1° for the optimal mix design. The variation of the water contact angle of different mixes can be explained by the Cassie–Baxter model. The experiments using rolling off dust on the super hydrophobic surface present excellent self-cleaning ability. Moreover, proposed super hydrophobic surface exhibited excellent UV-durability, indicating a promising potential for the outdoor application.

中文翻译：

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超疏水氯氧化镁水泥（MOC）：从结构控制到自洁性能评价

在本文中，具有针状结构的氯氧化镁水泥 (MOC) 使用一种简单的方法，包括浸入 FAS-乙醇溶液中，使其具有超疏水表面。考察了原料摩尔比对超疏水性能的影响。通过X射线衍射、扫描电子显微镜、水接触角测量仪和机械测试详细研究了相组成、微观结构、抗压强度、耐水性和润湿行为。对于最佳混合设计，所制备的 MOC 的水接触角达到 152 ± 1°。不同混合物的水接触角的变化可以通过 Cassie-Baxter 模型来解释。在超疏水表面上滚落灰尘的实验表现出优异的自清洁能力。