Abstract Polymeric cool roofing materials have been concerned all along for their promising applications in energy-saving fields. Simultaneously, anti-icing property is another significant consideration for roofing materials. Herein, porous surfaces were constructed through immersing poly(methyl methacrylate) (PMMA)/chlorinated polyethylene (CPE) blending sheets in cyclohexane/methylbenzene/acetone (90/10/10) mixed solvent to selectively etch some components, and their cooling and anti-icing properties were investigated. Both solar reflectance (Rsol) and thermal emissivity (eT) at atmospheric window (8–13 µm) of porous sample with 30 wt% CPE (Rsol = 93.7%, eT = 87.1%) were higher than those of pure PMMA (Rsol = 13.0%, eT = 86.4%). The porous sample with 30% CPE as a simulated roof possessed the best cooling performance from cooling test: its final temperature was only 25.3 °C after 1 h solar radiation, 27.1 °C lower than that of pure PMMA. Moreover, the porous sample with 30 wt% CPE exhibited very hydrophobic and good anti-icing properties. The freezing point and the freezing time of water on the hydrophobic surface were −24.4 °C and 568 s, 7.2 °C lower and 452 s longer than those of water on the surface of pure PMMA, respectively. We believe that this solar-reflective and anti-icing porous material has potential application for the next-generation roofing material.

中文翻译：

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通过选择性蚀刻制造具有优异冷却和防冰性能的太阳能反射疏水聚合物材料

摘要 高分子冷屋面材料因其在节能领域的广阔应用前景而备受关注。同时，防冰性能是屋顶材料的另一个重要考虑因素。在此，通过将聚（甲基丙烯酸甲酯）（PMMA）/氯化聚乙烯（CPE）共混片浸入环己烷/甲苯/丙酮（90/10/10）混合溶剂中以选择性蚀刻某些组分，并对其进行冷却和抗腐蚀，构建多孔表面。 -结冰特性进行了研究。具有 30 wt% CPE（Rsol = 93.7%，eT = 87.1%）的多孔样品在大气窗口（8-13 µm）处的太阳反射率（Rsol）和热发射率（eT）均高于纯 PMMA（Rsol = 13.0%，eT = 86.4%）。具有 30% CPE 的多孔样品作为模拟屋顶的冷却测试具有最佳的冷却性能：太阳辐射1小时后，其最终温度仅为25.3°C，比纯PMMA低27.1°C。此外，含有 30 wt% CPE 的多孔样品表现出非常疏水和良好的防冰性能。疏水表面上水的凝固点和凝固时间分别为-24.4°C和568 s，比纯PMMA表面的水低7.2°C和长452 s。我们相信这种太阳能反射和防冰多孔材料对于下一代屋顶材料具有潜在的应用价值。分别比纯 PMMA 表面的水低 2°C 和长 452 秒。我们相信这种太阳能反射和防冰多孔材料对于下一代屋顶材料具有潜在的应用价值。分别比纯 PMMA 表面的水低 2°C 和长 452 秒。我们相信这种太阳能反射和防冰多孔材料对于下一代屋顶材料具有潜在的应用价值。