E-mail Alert
RSS
| Citation: |
Zheng Zhixia, Yang Huan. Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface[J]. Opto-Electronic Engineering, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022
|
Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface
-
Abstract
A regionally controllable super hydrophobic/super hydrophilic mixed surface was prepared by laser ablation, and the effects of pre-wetting on the surface wettability of samples under water and oil were studied, as well as the stability of the surface wettability of samples. The results show that pre-wetting can change the oil contact angle underwater and water contact angle under-oil on the sample surface, and also change the behavior of bubbles on the surface. After the samples were soaked in water, heated or exposed to air, the super hydrophilic surface showed wettability transformation while the super hydrophobic surface was relatively stable. The sample can maintain long-term stability sealed dry preservation at room temperature. The results are of great significance for oil-water separation, oil-gas separation and bubble control in aqueous media.-
Keywords:
- laser ablation /
- wettability /
- chemical modification /
- surface free energy
-
-
References
[1] Bhushan B, Jung Y C. Natural and biomimetic artificial surfaces for superhydrophobicity, self-cleaning, low adhesion, and drag reduction[J]. Progress in Materials Science, 2011, 56(1): 1-108. doi: 10.1016/j.pmatsci.2010.04.003 [2] She Z X, Li Q, Wang Z W, et al. Researching the fabrication of anticorrosion superhydrophobic surface on magnesium alloy and its mechanical stability and durability[J]. Chemical Engineering Journal, 2013, 228: 415-424. doi: 10.1016/j.cej.2013.05.017 [3] Cao L L, Jones A K, Sikka V K, et al. Anti-icing superhydrophobic coatings[J]. Langmuir, 2009, 25(21): 12444-12448. doi: 10.1021/la902882b [4] Khew S Y, Tan C F, Yan H P, et al. Nanosecond laser ablation for enhanced adhesion of CuO nanowires on copper substrate and its application for oil-water separation[J]. Applied Surface Science, 2019, 465: 995-1002. doi: 10.1016/j.apsusc.2018.09.256 [5] Zhang H F, Yin L, Liu X W, et al. Wetting behavior and drag reduction of superhydrophobic layered double hydroxides films on aluminum[J]. Applied Surface Science, 2016, 380: 178-184. doi: 10.1016/j.apsusc.2016.01.208 [6] Watson G S, Green D W, Schwarzkopf L, et al. A gecko skin micro/nano structure-A low adhesion, superhydrophobic, anti-wetting, self-cleaning, biocompatible, antibacterial surface[J]. Acta Biomaterialia, 2015, 21: 109-122. doi: 10.1016/j.actbio.2015.03.007 [7] Celia E, Darmanin T, de Givenchy E T, et al. Recent advances in designing superhydrophobic surfaces[J]. Journal of Colloid and Interface Science, 2013, 402: 1-18. doi: 10.1016/j.jcis.2013.03.041 [8] Xu K C, Zhang C T, Lu T H, et al. Hybrid metal-insulator-metal structures on Si nanowires array for surface enhanced Raman scattering[J]. Opto-Electronic Engineering, 2017, 44(2): 185-191. doi: 10.3969/j.issn.1003-501X.2017.02.006 [9] Zhang X, Shi F, Niu J, et al. Superhydrophobic surfaces: from structural control to functional application[J]. Journal of Materials Chemistry, 2008, 18(6): 621-633. doi: 10.1039/B711226B [10] Emelyanenko A M, Shagieva F M, Domantovsky A G, et al. Nanosecond laser micro- and nanotexturing for the design of a superhydrophobic coating robust against long-term contact with water, cavitation, and abrasion[J]. Applied Surface Science, 2015, 332: 513-517. doi: 10.1016/j.apsusc.2015.01.202 [11] Tang T, Shim V, Pan Z Y, et al. Laser ablation of metal substrates for super-hydrophobic effect[J]. JLMN-Journal of Laser Micro/Nanoengineering, 2011, 6(1): 6-9. doi: 10.2961/jlmn.2011.01.0002 [12] Chun D M, Ngo C V, Lee K M. Fast fabrication of superhydrophobic metallic surface using nanosecond laser texturing and low-temperature annealing[J]. CIRP Annals, 2016, 65(1): 519-522. doi: 10.1016/j.cirp.2016.04.019 [13] Zhou R, Li F P, Hong M H. Laser interaction with materials and its applications in precision engineering[J]. Scientia Sinica Physica, Mechanica & Astronomica, 2017, 47(2): 024201. doi: 10.1360/SSPMA2016-00213 [14] 杨焕, 曹宇, 李峰平, 等.激光制备超疏水表面研究进展[J].光电工程, 2017, 44(12): 1160-1168. doi: 10.3969/j.issn.1003-501X.2017.12.003 Yang H, Cao Y, Li F P, et al. Research progress in superhydrophobic surfaces fabricated by laser[J]. Opto-Electronic Engineering, 2017, 44(12): 1160-1168. doi: 10.3969/j.issn.1003-501X.2017.12.003 [15] Liu M J, Wang S T, Jiang L. Nature-inspired superwettability systems[J]. Nature Reviews Materials, 2017, 2(7): 17036. doi: 10.1038/natrevmats.2017.36 [16] Zhang G L, Zhang J H, Su P C, et al. Non-activation MOF arrays as a coating layer to fabricate a stable superhydrophobic micro/nano flower-like architecture[J]. Chemical Communications, 2017, 53(59): 8340-8343. doi: 10.1039/C7CC03409A [17] Ou R W, Wei J, Jiang L, et al. Robust thermoresponsive polymer composite membrane with switchable superhydrophilicity and superhydrophobicity for efficient oil-water separation[J]. Environmental Science & Technology, 2016, 50(2): 906-914. [18] Yong J L, Chen F, Li M J, et al. Remarkably simple achievement of superhydrophobicity, superhydrophilicity, underwater superoleophobicity, underwater superoleophilicity, underwater superaerophobicity, and underwater superaerophilicity on femtosecond laser ablated PDMS surfaces[J]. Journal of Materials Chemistry A, 2017, 5(48): 25249-25257. doi: 10.1039/C7TA07528F [19] Zhou X Y, Zhang Z Z, Xu X H, et al. Robust and durable superhydrophobic cotton fabrics for oil/water separation[J]. ACS Applied Materials & Interfaces, 2013, 5(15): 7208-7214. doi: 10.1021/am4015346 [20] Liu M J, Wang S T, Wei Z X, et al. Bioinspired design of a superoleophobic and low adhesive water/solid interface[J]. Advanced Materials, 2009, 21(6): 665-669. doi: 10.1002/adma.200801782 [21] Wang H X, Zhou H, Niu H T, et al. Dual-layer superamphiphobic/superhydrophobic-oleophilic nanofibrous membranes with unidirectional oil-transport ability and strengthened oil-water separation performance[J]. Advanced Materials Interfaces, 2015, 2(4): 1400506. doi: 10.1002/admi.201400506 [22] Martines E, Seunarine K, Morgan H, et al. Superhydrophobicity and superhydrophilicity of regular nanopatterns[J]. Nano Letters, 2005, 5(10): 2097-2103. doi: 10.1021/nl051435t [23] Zhang X Y, Li Z, Liu K S, et al. Bioinspired multifunctional foam with self‐cleaning and oil/water separation[J]. Advanced Functional Materials, 2013, 23(22): 2881-2886. doi: 10.1002/adfm.201202662 [24] Jagdheesh R, Pathiraj B, Karatay E, et al. Laser-induced nanoscale superhydrophobic structures on metal surfaces[J]. Langmuir, 2011, 27(13): 8464-8469. doi: 10.1021/la2011088 [25] Xu K C, Yan H P, Tan C F, et al. Hedgehog inspired CuO Nanowires/Cu2O composites for broadband visible-light-driven recyclable surface enhanced Raman scattering[J]. Advanced Optical Materials, 2018, 6(7): 1701167. doi: 10.1002/adom.201701167 [26] Yan H P, Rashid M R B A, Khew S Y, et al. Wettability transition of laser textured brass surfaces inside different mediums[J]. Applied Surface Science, 2018, 427: 369-375. doi: 10.1016/j.apsusc.2017.08.218 [27] He A, Liu W W, Xue W, et al. Nanosecond laser ablated copper superhydrophobic surface with tunable ultrahigh adhesion and its renewability with low temperature annealing[J]. Applied Surface Science, 2018, 434: 120-125. doi: 10.1016/j.apsusc.2017.10.143 [28] Long J Y, Fan P X, Gong D W, et al. Superhydrophobic surfaces fabricated by femtosecond laser with tunable water adhesion: from lotus leaf to rose petal[J]. ACS Applied Materials & Interfaces, 2015, 7(18): 9858-9865. doi: 10.1021/acsami.5b01870 [29] Lai Y K, Gao X F, Zhuang H F, et al. Designing superhydrophobic porous nanostructures with tunable water adhesion[J]. Advanced Materials, 2009, 21(37): 3799-3803. doi: 10.1002/adma.200900686 [30] Zhou R, Lin S D, Shen F, et al. A universal copper mesh with on-demand wettability fabricated by pulsed laser ablation for oil/water separation[J]. Surface and Coatings Technology, 2018, 348: 73-80. doi: 10.1016/j.surfcoat.2018.05.035 [31] Yong J L, Chen F, Huo J L, et al. Femtosecond laser induced underwater superaerophilic and superaerophobic PDMS sheets with through microholes for selective passage of air bubbles and further collection of underwater gas[J]. Nanoscale, 2018, 10(8): 3688-3696. doi: 10.1039/C7NR06920K [32] Peters A M, Pirat C, Sbragaglia M, et al. Cassie-Baxter to Wenzel state wetting transition: scaling of the front velocity[J]. The European Physical Journal E, 2009, 29(4): 391-397. doi: 10.1140/epje/i2009-10489-3 [33] Ulman A. Formation and structure of self-assembled monolayers[J]. Chemical Reviews, 1996, 96(4): 1533-1554. doi: 10.1021/cr9502357 [34] Laibinis P E, Hickman J J, Wrighton M S, et al. Orthogonal self-assembled monolayers: alkanethiols on gold and alkane carboxylic acids on alumina[J]. Science, 1989, 245(4920): 845-847. doi: 10.1126/science.245.4920.845 [35] Schmohl A, Khan A, Hess P. Functionalization of oxidized silicon surfaces with methyl groups and their characterization[J]. Superlattices and Microstructures, 2004, 36(1-3): 113-121. doi: 10.1016/j.spmi.2004.08.026 -
Overview
Overview:The special wettabilities of solid surfaces have important roles in self-cleaning, anti-corrosion, anti-icing, resistance reduction, anti-bacterial, oil-water separation, oil-water-gas separation, and so on. In recent years, the research on special wettability has gradually developed from solid/water two-phase to solid/water/oil/air four-phase systems. It is of great significance to study the special wettability of superhydrophobic/superhydrophilic surface in water, oil, and the behavior of bubbles on it. This type of surface can be applied to oil-water separation, underwater bubble location and collection, liquid transportation and so on. By controlling the laser processing parameters, such as wavelength, pulse width, frequency, and scanning speed, the micro-nano scale structure with special wettability can be fabricated on the surfaces of various materials. In this paper, micro-nano scale structures on aluminum substrates were fabricated by a pulsed fiber laser, and superhydrophobic surfaces were prepared with a subsequent chemical modification. With a designed pattern, a secondary laser processing was conducted to remove the chemical layer on the superhydrophobic surface, then a superhydrophobic/superhydrophilic mixed surface was achieved. The effect of pre-wetting on the special wettability and the wetting stability of the samples were studied. The results showed that, for the superhydrophobic/superhydrophilic mixed surface, the wetting behaviors in water, in oil, and the corresponding behaviors of bubbles were closely related to wettability in air. The superhydrophobic surface exhibited superoleophilicity and superaerophilicity in water, and the superhydrophilic surface exhibited superoleophobicity and superaerophobicity in water. Besides, in oil, both superhydrophobic and superhydrophilic surfaces exhibited superaerophobicity and superhydrophobicity. The pre-wetting could influence the wettability in liquid. After pre-wetting with an oil, the superhydrophobic and superhydrophilic surface exhibited both superaerophobicity and superoleophilicty in water. Moreover, after pre-wetting with water, the superhydrophobic surface is superaerophobicity and superhydrophobicity in oil, while the superhydrophilic surface is superaerophobicity and superhydrophilicity. The stability test of the wettability for the superhydrophobic/superhydrophilic mixed surface shows that the wettability can be kept stable for a long time by drying and sealing under normal temperature. It is of great significance to study the underwater and under oil wettabilities of the superhydrophobic/superhydrophilic mixed surface, as well as the influence of pre-wetting on the wettability in oil and water, for controlling oil/water/gas and promoting the application of super hydrophobic/superhydrophilic mixed surfaces.
-
Access History
Export File
Citation
Zheng Zhixia, Yang Huan. Effect of pre-wetting on the wettability of laser ablated Al superhydrophobic/superhydrophilic surface[J]. Opto-Electronic Engineering, 2019, 46(8): 190022. doi: 10.12086/oee.2019.190022
Format
Content
DownLoad:
-
Figure 1.
Preparation of superhydrophobic/superhydrophilic mixed surfaces. (a) Procedures for SH surfaces and the hybrid SH/SHL surface; (b) Patterns for SH and hybrid SH/SHL surfaces
-
Figure 2.
SEM images of laser textured aluminum surface. (a) Large-area view; (b) Further magnified image of a single periodic unit; (c) Enlarged view of a microgroove; (d) Higher magnification image of micro/nano-particle aggregates
-
Figure 3.
Water wettability and oil wettability in air, underwater oil wettability and under-oil water wettability, underwater and under-oil bubble's behavior on the surface, and the influence of pre-wetting on wettability under water and oil. (a), (b) Water droplet on the sample surface in air; (c), (d) Oil droplet on the sample surface in air; (e), (f) Bubble on the sample surface in water; (g), (h) Oil droplet on the sample surface in water; (i), (j), (k), (l) After oil pre-wetting the sample, the bubble and oil droplet on the sample surface in water; (m), (n) Bubble and water on the sample surface in oil; (o), (p), (q) After water pre-wetting the sample, water droplet and bubble on the sample surface in oil
-
Figure 4.
Mechanism of oil wettability in water and water wettability in oil. (a), (b) Water droplet on superhydrophobic and superhydrophilic surfaces; (c), (d) Oil droplet on superhydrophobic and superhydrophilic surfaces; (e), (f) Bubble on the surface of sample underwater; (g), (h) Oil droplet on the surface of underwater sample; (i) Bubble on the surface of under-oil sample; (j) Water droplet on the surface of under-oil sample; (k) Bubble on the oil prewetting sample's surface in water; (l) Oil droplet on the water prewetting sample's surface in water; (m), (n) Bubble on the water prewetting sample's surface in oil; (o), (p) Water droplet on the water prewetting sample's surface in oil
-
Figure 5.
Relationship between wettability and exposure time, soaking time and heating temperature. (a) Relationship between wettability and time of exposure to air; (b) Relationship between wettability and immersion time; (c) The relationship between wettability of pure superhydrophobic or superhydrophilic surface and immersion time; (d) The relationship between wettability and heating temperature of hot plate
