Visualization Study on Microscale Wetting Dynamics of Water Droplets on Dry and Wet Hydrophilic Membranes

Kyungjin Park; Seong Yeon Kim; Jiwoo Hong; Jong Hyun Kim; Geunbae Lim

Korean Chemical Engineering Research, Vol.60, No.2, 277-281, May, 2022

DOI10.9713/kcer.2022.60.2.277 Export Citation

Visualization Study on Microscale Wetting Dynamics of Water Droplets on Dry and Wet Hydrophilic Membranes

Kyungjin Park^{1, 2}, Seong Yeon Kim³, Jiwoo Hong^{4, †}, Jong Hyun Kim^{1, 5, †}, and Geunbae Lim^{1, 6, †}

¹Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673, Korea
²Department of Medical Life Sciences, College of Medicine, College of Medicine, The Catholic University of Korea, Seoul, 06591, Korea
³Department of Chemical Engineering, McGill University, 845 Sherbrooke St W, Monctreal, Quebec H3A 0GA, Canada
⁴School of Mechanical Engineering, Soongsil University, 369 Sangdo-Ro, Dongjak-Gu, Seoul, 06978, Korea
⁵Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 376735, Korea
⁶, Korea

E-mail:, ,

The wetting dynamics of water droplets dispensed on the surface of dry and wet hydrophilic membranes were investigated experimentally from a microscale point of view. By using a high-speed, white-beam x-ray microimaging (WXMI) synchrotron, consecutive images displaying the dynamic motions of the droplets were acquired. Through analyzing the characteristics observed, it was found that the dry hydrophilic membrane showed local hydrophobicity at a certain point during the absorption process with apparent contact angles greater than 90. While on the other hand, the apparent contact angles of a water droplet absorbing into the wet membrane remained less than 90 and showed total hydrophilicity. The observations and interpretation of characteristics that affect the contact, wetting, recoiling, and dynamic behaviors of droplets are significant for controlling liquid droplet impingement in a desired manner.

Keywords:White-beam xray microimaging (WXMI);Wetting dynamics;Recoiling

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[2] Rein M, “Phenomena of Liquid Drop Impact on Solid and Liquid Surfaces,” Fluid Dynamic Research, 1993.

[3] Modaressi H, Garnier G, Langmuir, 18(3), 642 (2002)

[4] Modak CD, Kumar A, Tripathy A, Sen P, Nat Commun, 11(1), 4327 (2020)

[5] Kwon KS, Kim HS, Choi M, Rev. Sci. Instrum., 87(3), 035101 (2016)

[6] Krainer S, Smit C, Hirn U, Rsc Adv, 9(54), 31708 (2019)

[7] Li Z, Kong Q, Ma X, Zang D, Guan X, Ren X, Nanoscale, 9(24), 8249 (2017)

[8] Wijshoff H, Curr. Opin. Colloid Interface Sci., 36, 20 (2018)

[9] Gao YS, Jung SW, Pan L, Acs Omega, 4(15), 16674 (2019)

[10] Li X, Ma X, Lan Z, AIChE J., 55(8), 1983 (2009)

[11] Shen J, Liburdy JA, Pence DV, Narayanan V, J. Phys. Condens. Matter, 21(46), 464133 (2009)

[12] Verplanck N, Coffinier Y, Thomy V, Boukherroub R, Nano. Res. Lett., 2(12), 577 (2007)

[13] Larher Y, Langmuir, 13(26), 7299 (1997)

[14] Tran PA, Webster TJ, Int. J. Nanomed, 8, 2001 (2013)

[15] Nakajima A, Nakajima A, NPG Asia Mater. NPG Asia Materials, 3, 49 (2011)

[16] Yonemoto Y, Kunugi T, Sci. World J., 2014, 647694 (2014)

[17] Banerjee S, “Simple Derivation of Young, Wenzel and Cassie- Baxter Equations and its Interpretations,” arXiv preprint arXiv: 0808.1460 (2008).

[18] Whyman G, Bormashenko E, Stein T, Chem. Phys. Lett., 450(4-6), 355 (2008)

[19] Huang XM, Gates I, Sci Rep-Uk, 10(1) (2020)

[20] Ferrari M, J. Adhes. Sci. Technol., 28(8-9), 791 (2014)

[21] Pandey PR, Roy S, J. Phys. Chem. Lett., 4(21), 3692 (2013)

[22] Chen L, Li Z, Phys. Rev. E, 82(1-2), 016308 (2010)

[23] Kim S, Choi H, Polycarpou AA, Liang H, Friction, 4(3), 249 (2016)

[24] Bae KJ, Yao WH, He YL, Cho YR, Korean J. Met. Mater., 55(9), 624 (2017)

[25] Bormashenko E, Philos. Trans. R. Soc. Lond. Ser. A-Math. Phys. Eng. Sci., 368(1929), 4695 (2010)

[26] Li Y, Li J, Liu L, Yan Y, Zhang Q, Zhang N, He L, Liu Y, Zhang X, Tian D, Leng J, Jiang L, Adv. Sci., 7(18), 2000772 (2020)

[27] Shetabivash H, Dolatabadi A, AIP Advances, 7(9), 095003 (2017)

[28] Quetzeri-Santiago MA, Castrejón-Pita AA, Castrejón-Pita JR, Sci Rep-Uk, 9(1), 15030 (2019)

[29] Kannangara D, Zhang H, Shen W, Colloids Surf. A: Physicochem. Eng. Asp., 280(1-3), 203 (2006)

[30] Lee K, Ivanova N, Starov V, Hilal N, Dutschk V, Adv. Colloid Interface Sci., 144(1-2), 54 (2008)