润湿性对固体表面上液体的各种动力学行为具有重要影响，疏水表面的特殊润湿性是其在减阻、降噪、防污等领域有着广泛应用前景的根本原因。基于Shan-Chen模型的格子Boltzmann方法对疏水表面润湿性进行数值模拟，获得了材料属性和微形貌对疏水表面润湿性的影响规律。研究表明，要使疏水表面处于 Cassie-Baxter 润湿状态，微形貌高度必须大于某一临界值，而当疏水表面一旦处于 Cassie-Baxter 润湿状态后，继续增加微形貌高度也不会提高其疏水性能；疏水表面的表观接触角随气液界面分数先增大后减小，且存在一个最佳的气液界面分数使表观接触角达到最大。
Wettability has an important influence on the dynamic behavior of liquid on a solid surface.The spe-cial wettability is the fundamental reason that hydrophobic surfaces are widely applied in drag reduction,noise reduction,antifouling and so on.In this paper,the wettability of hydrophobic surfaces is simulated by lattice Boltzmann method based on Shan-Chen model,and effect of the material property and microcosmic topography on wettability of hydrophobic surfaces is obtained.The simulation results show that in order to make hydropho-bic surfaces under Cassie-Baxter wetting state,the height of microcosmic topography must be greater than a critical value.Once hydrophobic surfaces are under Cassie-Baxter wetting state,increasing the height of micro-cosmic topography does not improve its hydrophobicity.The apparent contact angle of hydrophobic surfaces first increases and then decreases when the gas-liquid interface fraction increases,and there is an optimum gas-liquid interface fraction so that the apparent contact angle is maximized.
参考文献
| [1] | Lin Feng;Shuhong Li;Yingshun Li;Huanjun Li;Lingjuan Zhang;Jin Zhai;Yanlin Song;Biqian Liu;Lei Jiang;Daoben Zhu .Super-Hydrophobic Surfaces: From Natural to Artificial[J].Advanced Materials,2002(24):1857-1860. |
| [2] | Wang Jiadao;Yu Ying;Chen Darong .Progress in surface profile of superhydrophobic surface[J].Cinese Science Bulletin,2006,51(18):2097-2099. |
| [3] | 郑傲然,周明,杨加宏.仿生超疏水表面的制备及润湿性研究[J].功能材料,2007(11):1874-1876,1883. |
| [4] | 连峰,谭家政,张会臣.表面形貌对润湿性及抗附着性能的影响[J].功能材料,2014(02):2105-2109. |
| [5] | Sun TL;Feng L;Gao XF;Jiang L .Bioinspired surfaces with special wettability[J].Accounts of Chemical Research,2005(8):644-652. |
| [6] | Fukagata K;Kasagi N;Koumoutsakos P .A theoretical prediction of friction drag reduction in turbulent flow by superhydrophobic surfaces[J].Physics of fluids,2006(5):51703-1-51703-4-0. |
| [7] | Doyoung Byun,Jongin Hong,Saputra,Jin Hwan Ko,Young Jong Lee,Hoon Cheol Park,Bong-Kyu Byun,Jennifer R. Lukes.Wetting Characteristics of Insect Wing Surfaces[J].仿生工程学报（英文版）,2009(01):63-70. |
| [8] | 王新亮,狄勤丰,张任良,顾春元.超疏水表面滑移理论及其减阻应用研究进展[J].力学进展,2010(03):241-249. |
| [9] | Yamamoto K;Ogata S .3-D thermodynamic analysis of superhydrophobic surfaces[J].Journal of Colloid and Interface Science,2008(2):471-477. |
| [10] | Luo ZZ;Zhang ZZ;Hu LT;Liu WM;Guo ZG;Zhang HJ;Wang WJ .Stable bionic superhydrophobic coating surface fabricated by a conventional curing process[J].Advanced Materials,2008(5):970-974. |
| [11] | Zheng Lijun;Wu Xuedong;Lou Zeng et al.Preparation of superhydrophobic surface by microcosmic structure[J].Cinese Science Bulletin,2004,49(17):1691-1699. |
| [12] | 潘光,黄桥高,胡海豹,刘占一.微观结构对超疏水表面润湿性的影响[J].高分子材料科学与工程,2010(07):163-166. |
| [13] | Bhatnagar P L;Gross E P;Krook M .A model for colli-sion processes in gases.I.Small amplitude processes in charged and neutral one-component systems[J].Physical Review,1954,94(3):511-525. |
| [14] | Shan Xiaowen;Chen Hudong .Lattice Boltzmann model for simulating flows with multiple phases and compo-nents[J].Physical Review E,1993,47(3):1815-1819. |
| [15] | Shan Xiaowen;Chen Hudong .Simulation of nonideal ga-ses and liquid-gas phase transitions by the lattice Boltz-mann equation[J].Physical Review E,1994,49(4):2941-2948. |
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