Superhydrophobic surfaces made of flexible materials have attracted much attention in the fields of wearable and flexible devices. In this work, an easy-to-process, fluorine-free, mechanically stable superhydrophobic surface with a multilayered rough structure was fabricated by the template/spraying method using silicone rubber with mechanical flexibility, electrical insulation, and bio-inertness. It can form an air layer between the droplet and the sample, reducing the contact area between the droplet and the sample, and its contact angle can reach 170°and the rolling angle can be 2.5°. After many bendings and twistings, the sample still maintains excellent superhydrophobic performance. The contact angle of the sample still exceeded 150°after 100 cm of abrasion on the sandpaper. Droplets can bounce many times on the sample surface without being stuck. Compared with the control surface, the time from the beginning of precooling to the complete freezing of droplets on the superhydrophobic surface was extended by a factor of 3.4 at −10 °C. Therefore, this research still has a bright application prospect in extreme environments.
This article deals with study of the influence of four‐needle zinc oxide (T‐ZnOw) on the basic mechanical properties of ternary fluororubber (FKM) and the frictional properties of FKM improved by four‐needle zinc oxide under different temperatures. T‐ZnOw/FKM composites were prepared by mechanical blending and hot molding after pretreatment with silane coupling agent. The hardness, tensile, tearing, rotating friction at normal temperature, and reciprocating friction at high temperature of FKM and T‐ZnOw/FKM were studied. The results showed that T‐ZnOw with needle‐like three‐dimensional (3D) structure can effectively decompose the point stress generated in the tensile process of the composite, and the uniform distribution of tensile force improves the fracture base point and final mechanical properties of the composite. Its unique 3D structure can reduce fatigue wear caused by extrusion plastic deformation of the matrix during the friction process. The friction coefficient and wear rate of materials were effectively reduced by the reduction of plastic deformation resistance and fatigue wear area in the process of friction. Especially at 200°C, the friction coefficient and wear rate of T‐ZnOw/FKM were reduced by 30% and 55.32%, respectively, by T‐ZNOW/FKM doping.
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