Influence of Microstructures on Wettability on Stainless Steel

Abstract:

The influence of microstructures on wettability on stainless steel was investigated. Two kinds of different microstructures were manufactured by a laser processing method with micro parallel grating and square pillars array. The experimental and theoretical values of contact angle (CA) were obtained. Furthermore, within the groove spacing processing size range in micron scale, the experimental results agreed with the theoretical predictions based on the Wenzel. By the influence of machining and measuring conditions, the experimental values of CA were smaller than the predicted theoretical values. A linear relationship between the CA and the micro-scale structures was obtained, which showed the CA was increased with an increase of groove spacing. With the same structural parameters, the CA of square pillars array microstructures was larger than parallel grating microstructures.

• Periodical: Advanced Materials Research (Volume 644)
• Pages: 145-150
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.644.145
• Online since: January 2013
• Authors: Ting Fu, Yong Tang, Liang Guo, Zhen Ping Wan, Wen Jie Luo
• Keywords: Contact Angle (CA), Laser Processing, Microstructure, Wettability

References

[1] Young T. An essay on the cohesion of fluids. Philosophical Transactions of the Royal Society of London, 95: 65-87(1805).

DOI: 10.1098/rstl.1805.0005

[2] De Gennes P G. Wetting: statics and dynamics. Reviews of modern physics, 57(3): 827(1985).

DOI: 10.1103/revmodphys.57.827

[3] Zhu Liang, Feng Yan-ying, Ye Xiong-ying, Zhou Zhao-ying. Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures. Sensors and Actuators A: Physical, 130: 595-600(2006).

DOI: 10.1016/j.sna.2005.12.005

[4] Kubiakk., Wilson M, Mathia, T, Carva P. Wettability versus roughness of engineering surfaces. Wear, 271(3): 523-528(2011).

DOI: 10.1016/j.wear.2010.03.029

[5] Barthlott, W. and C. Neinhuis. Purity of the sacred lotus, or escape from contamination in biological surfaces. Planta, 202(1): 1-8(1997).

DOI: 10.1007/s004250050096

[6] Feng Lin, LI Shu-hong, LI Ying-shun, Li Huan-jun, ZHANG Ling-juan, Zhai Jin, Song Yan-lin, Liu Biqian, JIANG Lei, ZHU Dao-ben . Super‐Hydrophobic Surfaces: From Natural to Artificial. Advanced materials, 14(24): 1857-1860(2002).

DOI: 10.1002/adma.200290020

[7] Marmur A. The Lotus Effect: Superhydrophobicity and Metastability. Langmuir, 20(9): 3517- 3519 (2004).

DOI: 10.1021/la036369u

[8] Schwartz W, Garoff S. Contact angle hysteresis on heterogeneous surfaces. Langmuir, 1(2): 219-230(1985).

DOI: 10.1021/la00062a007

[9] Wenzel R N. Resistance of solid surfaces to wetting by water. Industrial & Engineering Chemistry, 28(8): 988-994(1936).

DOI: 10.1021/ie50320a024

[10] Cassie A. and Baxter S. Wettability of porous surfaces. Trans. Faraday Soc, 40(0): 546-551(1944).

DOI: 10.1039/tf9444000546

[11] Wenzel R N. Surface Roughness and Contact Angle. The Journal of Physical Chemistry , 53(9): 1466-1467(1949).

[12] Cassie A B D. Contact angles. Discuss. Faraday Soc, 3: 11-1(1948).