荷叶在水下的超疏水状态的寿命测试与分析
发布时间：2019-02-28 17:36
【摘要】：水下超疏水现象在金属防腐蚀保护、减阻和防止水下污垢等方面具有重要的应用价值.水下超疏水状态的寿命是制约超疏水材料在水下应用的重要因素.本文通过连续记录超疏水界面处反射光光强变化测试了荷叶在不同水深下的超疏水状态的寿命.荷叶在水下的润湿状态随时间变化可分为3个阶段:非润湿阶段、部分润湿阶段、完全润湿阶段.非润湿阶段持续的时间即是水下超疏水状态的寿命,随水深的升高呈指数下降,在水深高于毛细力所能抵抗的极限深度时寿命又进一步缩短.气液界面的稳定依靠毛细力产生的悬挂力和空气内部压力共同维持.提高毛细力所能抵抗的极限水深可以使超疏水材料在更深的水域下得到应用.
[Abstract]:The underwater superhydrophobic phenomenon has important application value in metal corrosion protection, drag reduction and underwater fouling prevention. The life span of underwater superhydrophobic state is an important factor restricting the application of superhydrophobic material under water. The life span of lotus leaf in the superhydrophobic state at different water depths was measured by continuously recording the change of reflected light intensity at the superhydrophobic interface. The wetting state of lotus leaves under water with time can be divided into three stages: non-wetting stage, partial wetting stage and complete wetting stage. The duration of the non-wetting stage is the life of the underwater superhydrophobic state, which decreases exponentially with the increase of the water depth, and shortens further when the water depth is higher than the limit depth which can be resisted by the capillary force. The stability of the gas-liquid interface is maintained by the suspended force produced by the capillary force and the internal pressure of the air. The ultra-hydrophobic material can be used in deeper waters by increasing the limit water depth of capillary resistance.
【作者单位】： 西北工业大学工程力学系;
【基金】：国家自然科学基金(11372251) 西北工业大学研究生创业种子基金(Z2014122) 中央高校基本科研业务费(3102014KYJD016)资助
【分类号】：O341
本文编号：2432010
[Abstract]:The underwater superhydrophobic phenomenon has important application value in metal corrosion protection, drag reduction and underwater fouling prevention. The life span of underwater superhydrophobic state is an important factor restricting the application of superhydrophobic material under water. The life span of lotus leaf in the superhydrophobic state at different water depths was measured by continuously recording the change of reflected light intensity at the superhydrophobic interface. The wetting state of lotus leaves under water with time can be divided into three stages: non-wetting stage, partial wetting stage and complete wetting stage. The duration of the non-wetting stage is the life of the underwater superhydrophobic state, which decreases exponentially with the increase of the water depth, and shortens further when the water depth is higher than the limit depth which can be resisted by the capillary force. The stability of the gas-liquid interface is maintained by the suspended force produced by the capillary force and the internal pressure of the air. The ultra-hydrophobic material can be used in deeper waters by increasing the limit water depth of capillary resistance.
【作者单位】： 西北工业大学工程力学系;
【基金】：国家自然科学基金(11372251) 西北工业大学研究生创业种子基金(Z2014122) 中央高校基本科研业务费(3102014KYJD016)资助
【分类号】：O341
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