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Lori Zoudani E, Nguyen NT, Kashaninejad N. Engineering Wettability Transitions on Laser-Textured Shark Skin-Inspired Surfaces via Chemical Post-Processing Techniques. MICROMACHINES 2024; 15:1442. [PMID: 39770195 PMCID: PMC11676299 DOI: 10.3390/mi15121442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2024] [Revised: 11/19/2024] [Accepted: 11/26/2024] [Indexed: 01/11/2025]
Abstract
Surface wettability, the interaction between a liquid droplet and the surface it contacts, plays a key role in influencing droplet behavior and flow dynamics. There is a growing interest in designing surfaces with tailored wetting properties across diverse applications. Advanced fabrication techniques that create surfaces with unique wettability offer significant innovation potential. This study investigates the wettability transition of laser-textured anisotropic surfaces featuring shark skin-inspired microstructures using four post-processing methods: spray coating, isopropyl alcohol (IPA) treatment, silicone oil treatment, and silanization. The impact of each method on surface wettability was assessed through water contact angle measurements, scanning electron microscopy (SEM), and laser scanning microscopy. The results show a transition from superhydrophilic behavior on untreated laser-textured surfaces to various (super)hydrophobic states following surface treatment. Chemical treatments produced different levels of hydrophobicity and anisotropy, with silanization achieving the highest hydrophobicity and long-term stability, persisting for one year post-treatment. This enhancement is attributed to the low surface energy and chemical properties of silane compounds, which reduce surface tension and increase water repellence. In conclusion, this study demonstrates that post-processing techniques can effectively tailor surface wettability, enabling a wide range of wetting properties with significant implications for practical applications.
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Affiliation(s)
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, 170 Kessels Road, Brisbane, QLD 4111, Australia;
| | - Navid Kashaninejad
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, 170 Kessels Road, Brisbane, QLD 4111, Australia;
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Mo M, Bai X, Liu Z, Huang Z, Xu M, Ma L, Lai W, Mo Q, Xie S, Li Y, Huang Y, Xiao N, Zheng Y. Defect by design: Harnessing the "petal effect" for advanced hydrophobic surface applications. J Colloid Interface Sci 2024; 673:37-48. [PMID: 38875796 DOI: 10.1016/j.jcis.2024.05.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 05/15/2024] [Accepted: 05/24/2024] [Indexed: 06/16/2024]
Abstract
HYPOTHESIS In the interfacial wetting boundary, the superhydrophobic surface is often damaged, and the anisotropic wettability of its surface has attracted many researchers' attention. The "petal effect" surface has typical anisotropic wettability. We predict that under the dual conditions of structural defects and high impact velocity, the "petal effect" becomes more adhesive on the surface. EXPERIMENTS This study refers to the droplet state on rose petals, structural defects were constructed on the superhydrophobic surface. This paper studies the influence of macro-structural defects on the wettability change from natural to bionic "lotus effect" to "petal effect" in both static and dynamic angles. FINDINGS Macro defects significantly change the static contact angle of the superhydrophobic surface. The higher the impact velocity of the droplet, the higher the energy dissipation of the "petal effect" surface (DSHS), which improves the adhesion of the surface to the droplet and prolongs the contact time. It is found that the defect structure and high impact velocity will directly affect the deposition and desorption of droplets on the superhydrophobic surface, and they are both essential. This wetting dynamic law is very likely to be helpful in the quantitative design of defect structure scale for dynamic desorption of droplets on superhydrophobic surfaces.
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Affiliation(s)
- Min Mo
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xingjia Bai
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Zhonglin Liu
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Zhimin Huang
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Mengxue Xu
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Lanyu Ma
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Wenqin Lai
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Qiufeng Mo
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Songbo Xie
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Yanming Li
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Yifeng Huang
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China
| | - Ning Xiao
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China
| | - Yihua Zheng
- Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Advanced Materials Industry Institute of Guangxi Academy of Science, Guangxi Academy of Sciences, Nanning 530007, China.
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Liu Z, Niu T, Lei Y, Luo Y. Metal surface wettability modification by nanosecond laser surface texturing: A review. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Zhifang Liu
- Chongqing University of Technology Chongqing China
| | - Tong Niu
- Chongqing University College of Mechanical and Vehicle Engineering Chongqing China
| | - Yaxi Lei
- China Academy of Engineering Physics Mianyang Sichuan China
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Jiang G, Tian Z, Wang L, Luo X, Chen C, Hu X, Peng R, Zhang H, Zhong M. Anisotropic Hemiwicking Behavior on Laser Structured Prismatic Microgrooves. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6665-6675. [PMID: 35578803 DOI: 10.1021/acs.langmuir.2c00568] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The wicking phenomenon, including wicking and hemiwicking, has attracted increasing attention for its critical importance to a wide range of engineering applications, such as thermal management, water harvesting, fuel cells, microfluidics, and biosciences. There exists a more urgent demand for anisotropic wicking behaviors since an increasing number of advanced applications are significantly complex. For example, special-shaped vapor chambers and heating atomizers in some electronic cigarettes need liquid replenishing with various velocities in different directions. Here, we report two-dimensional anisotropic hemiwicking behaviors with elliptical shapes on laser structured prismatic microgrooves. The prismatic microgrooves were fabricated via one-step femtosecond laser direct writing, and the anisotropic hemiwicking behaviors were observed when utilizing glycerol, glycol, and water as the test liquid. Specifically, the ratios of horizontal wicking distance in directions along short and long axes were tan 0°, tan 15°, tan 30°, and tan 45° for samples with cross-angles of 0°, 30°, 60°, and 90°, respectively. The vertical water wicking front displayed corresponding angles under the guidance of laser structured prismatic microgrooves. Theoretical analysis shows that the wicking distance is mainly dependent on the cross-angle θ and surface roughness, in which the wicking distance is proportional to cos(θ/2). Driven by the capillary pressure forming in the narrow microgrooves, the liquid initially filled the valleys of microgrooves and then surrounded and covered the prismatic ridges with laser-induced nanoparticles. The abundant nanoparticles increased the surface roughness, leading to the enhancement of wicking performance, which was further evidenced by the larger wicking speed of the sample with more nanoparticles. The mechanism of anisotropic hemiwicking behaviors revealed in this work paves the way for wicking control, and the proposed prismatic microgrooved surfaces with two-dimensional anisotropic hemiwicking performance and superhydrophilicity could serve in a broad range of applications, especially for the advanced thermal management with specific heat load configurations.
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Affiliation(s)
- Guochen Jiang
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Ze Tian
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Lizhong Wang
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Xiao Luo
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Changhao Chen
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Xinyu Hu
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Rui Peng
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Hongjun Zhang
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Minlin Zhong
- Laser Materials Processing Research Centre, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
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Sultana A, Hassan N, Lu S, Xu W, Abbas M, Ilays M, Firdoos S, Khan MA. Fabrication of stable ZnO/Zn–Al/Al2O3 superhydrophobic material on aluminum substrate for high photocatalytic and antibacterial activity. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02237-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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