二 氧 化 硅 基 润 湿 梯 度 表 面 制 备 及 其静 润 湿 特 性 分 析

[Objectives]The wetting gradient surface has potential application value in such fields as ship anti-fouling and submarine drag reduction, requiring further research on low-cost and low-complexity wetting gradient surface preparation technology.[Methods]The preparation and static wetting characteristics of a silica-based wetting gradient surface are analyzed using vapor deposition, alkali corrosion and a combination of both.[Results]The contact angle using vapor deposition reaches 104.9°, with a largest range of about 23°; that using alkali corrosion reaches 80.2°, with a largest range of about 60°; and that using both methods reaches 102.1°, with a largest range of about 40°.[Conclusions]The results of this study can provide references for the preparation of functional surfaces for marine equipment.