This study developed a tactic to attain an ice-phobic polyurethane (PU) composite coating, which was fabricated by incorporating minor dosages of hybrid silica particles and silicone oil (SO) into the formulation of a commercial aerospace PU topcoat. The hybrid silica particles were synthesized by anchoring polydimethylsiloxane (PDMS) oligomers to silica microspheres. Both hybrid particles and SO amalgamate in the surface matrix of PU to induce a spread of wrinkling micro-loops over the coating. This coating surface morphology is structurally different from the well-known slippery liquid-infused porous surface since no liquid bulk is embedded in the surface matrix of PU coating. The icephobic property was characterized on a thermoelectric Peltier cooling plate, over which the frosting extents with cooling in ambient humidity conditions (~75 % RH) were compared. We have identified three coating fabrication factors responding to the delay of frosting inside the condensed water droplets overlying the PU coating. At the same time, they are cooled: the fuzzy PDMS layer on silica microspheres, i.e., hybrid particles, the fusion of SO with the hybrid particles, and the dosages of the hybrid particles and SO applied. Typically, when the PU composite topcoat comprises 0.4 wt% (based on PU matrix) hybrid particles and 0.4 wt% SO of the hybrid particle, it adjourns the onset of frosting to ~ −10 of from - 5.6 °C on the aerospace PU topcoat. This outcome is attributed to the micro round loops with folding edges and peripheric wrinkles that possess low-temperature softness and play a pivotal role in deferring icing inside the overlying water droplets.

本研究开发了一种策略来获得一种防冰聚氨酯 (PU) 复合涂层，该涂层是通过在商业航空航天 PU 面漆的配方中加入少量混合二氧化硅颗粒和硅油 (SO) 制成的。通过将聚二甲基硅氧烷 (PDMS) 低聚物锚定到二氧化硅微球上来合成杂化二氧化硅颗粒。混合颗粒和 SO 都在 PU 的表面基质中融合，从而在涂层上产生起皱微环的扩散。这种涂层表面形态在结构上不同于众所周知的光滑的液体注入多孔表面，因为没有液体块体嵌入到 PU 涂层的表面基质中。在热电珀耳帖冷却板上表征了疏冰特性，比较了在环境湿度条件（~75 % RH）下冷却时结霜的程度。我们已经确定了三个涂层制造因素，以响应覆盖在 PU 涂层上的冷凝水滴内的结霜延迟。同时，它们被冷却：二氧化硅微球上的模糊PDMS层，即杂化颗粒，SO与杂化颗粒的融合，以及杂化颗粒和SO的用量。通常，当 PU 复合面漆包含 0.4 wt%（基于 PU 基体）杂化颗粒和 0.4 wt% SO 的杂化颗粒时，它会将航空 PU 面漆上的结霜时间推迟到 -10 - 5.6 °C .