Superhydrophobic surfaces show attractive anti-icing properties. However, it remains a challenge for them to achieve icephobicity and ultralow ice adhesion in a humid environment, which is fundamentally attributed to the icing behavior on their hierarchical textures. Here, we address the issue by integrating a superhydrophobic copper mesh with an intelligent organogel that can secrete antifreezing agent autonomously in response to temperature. The antifreezing agent is composed of ethylene glycol and water. By autonomously secreting the antifreezing agent at subzero temperatures, the hybrid surface effectively inhibits the frosting process on the hierarchical texture of the superhydrophobic mesh. Consequently, the surface not only exhibits excellent antifrosting properties in a humid atmosphere but also repeatedly removes the ice deposited spontaneously due to ultralow ice adhesion (8 Pa). This integration of intelligent organogel paves a new and promising avenue to design superhydrophobic surfaces with excellent icephobic properties.
Photothermal superhydrophobic treatment is an effective anti-icing and de-icing method, avoiding damage to equipment caused by ice accumulation in winter. However, the traditional photothermal materials were expensive and the photothermal conversion coatings are hard to remove when unnecessary. Herein, three biochar microspheres with solid, hollow, and flower-like structures (SBMs, HBMs, FBMs) were fabricated to construct photothermal superhydrophobic coatings on the polyester fabric (PET), respectively. The photothermal conversion efficiency of the coating constructed with flower-like biochar microspheres (FBMs@PPF) reached 95.42 %, and the ice (500 μL) can be completely melted into water under a simulated solar light source (1000 W/m 2 , −10 ℃) for 5 min. The water contact angle (WCA) and rolling angle (RA) on FBMs@PPF reached 162.6° and 1.5° respectively. Droplets can slide off the coating easily with a tilt angle (> 1.5°). The coating prepared by flower-like biochar microspheres exhibited greater photo-responsive self-deicing ability. The covered fabric coating can be removed easily, which may provide a useful reference for the prevention of frost disasters.
危险品化学品经营许可证（带存储）