Abstract: At present, the effects of wettability and roughness on bubble wetting behaviors are not clear. To systematically study the bubble wetting behaviors, bubble apparent contact angle and contact angle hysteresis experiments were conducted. And qualitative relationships between Young's contact angle, surface roughness and bubble wetting behaviors from strongly hydrophilicity to hydrophobicity on three solid surfaces with different surface roughness (S1 r=1.15, S2 r=1.64, S3 r=1.64). Results show that wetting behaviors of bubble follow the friction force theory. With the increase of roughness, the apparent contact angle and contact angle hysteresis decrease. Distorted apparent contact angles occur in hydrophilic states resulted from buoyancy and hydrostatic pressure. With increasing of Young's contact angle, the apparent contact angle and contact angle hysteresis keep unchanged under hydrophilic states. However, in neutrally-wet states, apparent contact angle starts following the Cassie-Baxter equation, contact angle hysteresis also significantly increases on the S1 and S2, and increasing rate of S2 is less than that of S1. Contact angle hysteresis of S3 keeps unchanged with different wetting states. When wettability reaches neutrally-wet state, bubble apparent contact angles are equal to drop receding angles, drop apparent contact angles are equal to bubble advancing angles for S1, while these phenomena do not present on more rough surfaces (S2, S3).
通讯作者:
* 郑军,成都理工大学能源学院副教授,博士研究生导师。2003年、2007年、2011年获成都理工大学工学学士、工学硕士,工学博士学位。目前主要从事油气储层物性测试及建模技术等方面的研究工作。发表论文20余篇,包括Journal of Petroleum Science and Engineering、Colloids and Surfaces A、International Journal of Multiphase Flow等学术期刊,获授权发明专利10余项。61433095@qq.com
作者简介: 肖易航,成都理工大学能源学院讲师。2016年、2019年、2023年分别获成都理工大学工学学士、工学硕士、工学博士学位。目前主要从事多相渗流机理及表面润湿行为等方面的研究工作。发表论文19篇,包括Colloids and Surfaces A、Geoenergy Science and Engineering等学术期刊,获授权发明专利5项。
引用本文:
肖易航, 郑军, 何勇明. 气泡在粗糙表面的润湿行为研究[J]. 材料导报, 2023, 37(23): 22030060-7.
XIAO Yihang, ZHENG Jun, HE Yongming. Investigation of Wetting Behaviors for Air Bubble on Rough Surfaces. Materials Reports, 2023, 37(23): 22030060-7.
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2023, Vol. 37 
