The applications of superhydrophobic coatings in daily life are receiving increasing attention. Here, we report a general approach for preparing superhydrophobic coatings with high repellency to daily consumed liquid foods based on food grade waxes. The coatings are prepared by spray-coating the homogeneous wax suspensions in ethanol followed by annealing at 40 °C. The wax suspensions are formed by the heating dissolution-cooling precipitation-ultrasonication process thanks to the unique solubility of the waxes in ethanol. Ultrasonication of the wax suspension is helpful to improve superhydrophobicity by reducing the size of the wax microplatelets. Annealing at 40 °C could enhance mechanical stability of the coatings. The coatings are superhydrophobic with a water contact angle of 158.2° and a sliding angle of 7.3°. The coatings are resistant to intense water jetting and immersion in corrosive aqueous solutions. In addition, the coatings show excellent anti-adhesive properties for various liquid foods including cola, honey, milk and yoghourt. Moreover, the coatings are applicable onto different substrates (e.g., glass slide, PET plate and polyethylene plate) and could be prepared using different waxes (e.g., paraffin wax, beeswax and microcrystalline wax). We believe that the wax superhydrophobic coatings could find applications in various fields such as anti-adhesion of liquid foods, fruit preservation and anti-bioadhesion, etc.

超疏水涂料在日常生活中的应用日益受到关注。在这里，我们报告了一种基于食品级蜡的日常使用的液态食品，具有高拒水性的超疏水涂料制备的一般方法。通过将均匀的蜡悬浮液喷涂在乙醇中，然后在40°C下退火，可以制备涂层。由于蜡在乙醇中的独特溶解性，蜡悬浮液是通过加热溶解-冷却沉淀-超声处理而形成的。蜡悬浮液的超声处理通过减小蜡微片的大小有助于改善超疏水性。在40°C下退火可以增强涂层的机械稳定性。涂层是超疏水的，水接触角为158.2°，滑动角为7.3°。该涂料可抵抗强烈的水喷射和浸入腐蚀性水溶液中。另外，该涂料对可乐，蜂蜜，牛奶和酸奶等各种液体食品显示出优异的抗粘性能。此外，该涂料适用于不同的基材（例如玻璃载玻片，PET板和聚乙烯板），并且可以使用不同的蜡（例如石蜡，蜂蜡和微晶蜡）制备。我们相信，蜡超疏水性涂料可以在液体食品的防粘，水果保鲜和生物粘着等各个领域找到应用。该涂料适用于不同的基材（例如载玻片，PET板和聚乙烯板），并可以使用不同的蜡（例如石蜡，蜂蜡和微晶蜡）制备。我们相信，蜡超疏水性涂料可以在液体食品的防粘，水果保鲜和生物粘着等各个领域找到应用。该涂料适用于不同的基材（例如载玻片，PET板和聚乙烯板），并可以使用不同的蜡（例如石蜡，蜂蜡和微晶蜡）制备。我们相信，蜡超疏水性涂料可以在液体食品的防粘，水果保鲜和生物粘着等各个领域找到应用。