A comparative study of the self-propelled jumping capabilities of coalesced droplets on RTV surfaces and superhydrophobic surfaces

doi:10.1088/1674-1056/abeedb

Abstract Understanding the mechanism of coalescence-induced self-propelled jumping behavior provides distinct insights in designing and optimizing functional coatings with self-cleaning and anti-icing properties. However, to date self-propelled jumping phenomenon has only been observed and studied on superhydrophobic surfaces, other than those hydrophobic surfaces with weaker but fairish water-repellency, for instance, vulcanized silicon rubber (RTV) coatings. In this work, from the perspective of thermodynamic-based energy balance aspect, the reason that self-propelled jumping phenomenon does not happen on RTV coatings is studied. The apparent contact angles of droplets on RTV coatings can be less than the theoretical critical values therefore cannot promise energy surplus for the coalesced droplets onside. Besides, on RTV and superhydrophobic surfaces, the droplet-size dependent variation characteristics of the energy leftover from the coalescence process are opposite. For the droplets coalescing on RTV coatings, the magnitudes of energy dissipations are more sensitive to the increase in droplet size, compared to that of released surface energy. While for superhydrophobic coatings, the energy generated during the coalescence process can be more sensitive than the dissipations to the change in droplet size.

Keywords: self-propelled jumping vulcanized silicon rubber (RTV) superhydrophobicity self-cleaning

Received: 16 November 2020
Revised: 21 January 2021
Accepted manuscript online: 16 March 2021

PACS:	65.40.gp	(Surface energy)
	45.20.dh	(Energy conservation)
	68.03.Cd	(Surface tension and related phenomena)
	68.08.-p	(Liquid-solid interfaces)

Corresponding Authors: ^†Corresponding author. E-mail: leeli@hust.edu.cn

Cite this article:

Sheng-Wu Wang(王晟伍), Lu Peng(彭璐), Jun-Wu Chen(陈俊武), and Lee Li(李黎) A comparative study of the self-propelled jumping capabilities of coalesced droplets on RTV surfaces and superhydrophobic surfaces 2021 Chin. Phys. B 30 046501

1 Wang Y H and Ming P J 2018 AIP Advances 8 065320
2 Peng B L, Wang S F, Lan Z, Xu W, Wen R F and Ma X H 2013 Appl. Phys. Lett. 102 151601
3 Jin X, Zhang X Y, Peng Y, Cao M Y, Liu H, Pei X H, Liu K S and Jiang L 2015 Adv. Eng. Mater. 17 961
4 Barthwal S and Lim S H 2019 Soft Matter 15 7945
5 Zhang Q L, He M, Chen J, Wang J, Song Y L and Jiang L 2013 Chem. Commun. 49 4516
6 Huang C, Bell R, Tsubaki A, Zuhlke C A and Alexander D R 2018 Journal of Laser Applications 30 011501
7 Wang Y H and Ming P J 2019 Physics of Fluids 31 122108
8 Chen Y, Liu G, Jiang L, Kim J Y, Ye F, Lee J K, Wang L and Wang B 2017 Chin. Phys. B 26 046801
9 Boreyko J B and Chen C H 2009 Phys. Rev. Lett. 103 184501
10 Boreyko J B and Chen C H 2010 Physics of Fluids 22 091110
11 Chen X M, Patel R S, Weibel J A, Garimella S V 2016 Sci. Rep. 6 18649
12 Wisdom K M, Watson J A, Qu X P, Liu F J, Watson G S and Chen C H 2013 Proc. Natl. Acad. Sci. USA 110 7992
13 Wang F C, Yang F Q and Zhao Y P 2011 Appl. Phys. Lett. 98 053112
14 Lv C J, Hao P F, Yao Z H, Song Y, Zhang X W and He F 2013 Appl. Phys. Lett. 103 021601
15 Liu X L and Cheng P 2013 International Journal of Heat and Mass Transfer 64 1041
16 Liu X L, Cheng P and Quan X J 2014 International Journal of Heat and Mass Transfer 73 195
17 Wang B, Nian J Y, Tie L, Zhang Y B, Guo Z G 2013 Acta Phys. Sin. 62 146801 (in Chinese)
18 Patankar N A 2003 Langmuir 19 1249
19 Wang K, Liang Q, Jiang R, Zheng Y, Lan Z and Ma X H 2017 Langmuir 33 6258
20 Menchaca A, Mart\'ínez A, Nù\ nez R, Popinet S and Zaleski S 2001 Phys. Rev. E 63 046309
21 Graham P J, Farhangi M M and Dolatabadi A 2012 Physics of Fluids 24 112105
22 Liu F J, Ghigliotti G, Feng J and Chen C H 2014 Journal of Fluid Mechanics 752 39
23 Tian L, Su M, Yu F F, Xu Y, Li X Y, Li L, Liu H L and Tan W H 2018 Nat. Commun. 9 1
24 Li B B, Xin F, Tan W and Zhu G R 2018 Industrial & Engineering Chemistry Research 57 8299
25 Eral H B, M't Mannetje D J C and Oh J M 2013 Colloid and Polymer science 291 247
26 Chu F Q, Wu X M and Zhu Y 2016 International Journal of Refrigeration 71 1
27 McHale G, Aqil S, Shirtcliffe N J, Newton M I and Erbil H Y 2005 Langmuir 21 11053
28 Chen X, Patel R S, Weibel J A and Garimella S V 2016 Sci. Rep. 6 18649
29 Wu S and Ma M 2017 Journal of Colloid and Interface Science 505 995
30 Yan X, Zhang L C, Sett S, Feng L Z, Zhao C Y, Huang Z Y, Vahabi H, Kota A K, Chen F and Miljkovic N 2019 ACS Nano 13 1309
31 Kim M K, Cha H, Birbarah P, Chavan S, Zhong C, Xu Y and Miljkovic N 2015 Langmuir 31 13452
32 Ren S, Chen J W, Jiang M, Wang S W, Wan Z Y, Xie Y, Li L 2020 Colloids and Surfaces A: Physicochemical and Engineering Aspects 611 125849
33 Gubanski S M and Vlastos A E 1990 IEEE Transactions on Power Delivery 5 1527
34 Homma H, Lee C R, Kuroyagi T and Izumi K 2000 Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials, June 21-26, 2000, Xi'an, China, p. 637

[1]	Ordered silicon nanorod arrays with controllable geometry and robust hydrophobicity Wang Zi-Wen (王子文), Cai Jia-Qi (蔡家琦), Wu Yi-Zhi (吴以治), Wang Hui-Jie (王会杰), Xu Xiao-Liang (许小亮). Chin. Phys. B, 2015, 24(1): 017802.
[2]	Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition Liu Si-Si (刘思思), Zhang Chao-Hui (张朝辉), Zhang Han-Bing (张寒冰), Zhou Jie (周杰), He Jian-Guo (何建国), Yin Heng-Yang (尹恒洋). Chin. Phys. B, 2013, 22(10): 106801.
[3]	A facile way to fabricate aluminum sheet with superhydrophobic and self-cleaning properties Yang Zhou (杨周), Wu Yi-Zhi (吴以治), Ye Yi-Fan (叶逸凡), Gong Mao-Gang (公茂刚), Xu Xiao-Liang (许小亮). Chin. Phys. B, 2012, 21(12): 126801.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

A comparative study of the self-propelled jumping capabilities of coalesced droplets on RTV surfaces and superhydrophobic surfaces

Cite this article:

Online attention