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Li X, Li H, Su H, Tan X, Lin X, Wu Y, Jiang L, Xiao T, Tan X. Substrate-Independent Superhydrophobic Coating Capable of Photothermal-Induced Repairability for Multiple Damages Fabricated via Simple Blade Coating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9449-9461. [PMID: 38659090 DOI: 10.1021/acs.langmuir.3c03882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Repairable superhydrophobic surfaces have promising application potential in many fields. However, so far, it is still a challenge to develop a superhydrophobic surface with repairability for multiple types of damage through a simple method. In this paper, a repairable superhydrophobic coating was obtained on various substrates by blade-coating mixtures of polydimethylsiloxane (PDMS), polyvinylidene fluoride (PVDF), and multiwalled carbon nanotubes (MWCNTs) modified with dopamine (PDA) and octadecylamine (ODA). The obtained coating has a good liquid-repellent property with a water contact angle above 150° and a water sliding angle of ∼6° and possesses an excellent absorbance (∼97%) in the wavelength range of 250-2500 nm. Due to its high absorbance, the coating displays an outstanding photothermal effect with a temperature rise of ∼65 °C under irradiation by 1.0 kW/m2 of simulated sunlight. Furthermore, after being degraded by multiple stimuli, including plasma treatment, acid/alkali/oil immersion, sand impact, and the icing-thawing cycle, the coating can recover superhydrophobicity via sunlight irradiation, demonstrating the good photothermal-induced repairability of the coating. It can be expected that the good water-repellent property, photothermal effect, and repairability give this coating a promising prospect in practical applications.
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Affiliation(s)
- Xinyi Li
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Solar Energy High Value Utilization and Green Conversion Hubei Provincial Engineering Research Center, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, P. R. China
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Hao Li
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Haoqiang Su
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xin Tan
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xiang Lin
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Yahui Wu
- Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Lihua Jiang
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Solar Energy High Value Utilization and Green Conversion Hubei Provincial Engineering Research Center, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Ting Xiao
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Solar Energy High Value Utilization and Green Conversion Hubei Provincial Engineering Research Center, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xinyu Tan
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Solar Energy High Value Utilization and Green Conversion Hubei Provincial Engineering Research Center, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, P. R. China
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Li X, Tan X, Chen W, Xiao T, Li X, Jiang L, Liu S, Tan X, Li T. Robust and Durable Superhydrophobic Coatings with Antipollution Flashover Performance via Silane-Modified Polyurea. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5151-5161. [PMID: 38422986 DOI: 10.1021/acs.langmuir.3c03243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
The inadequate hydrophobicity and the degradation in usage seriously hampered the applications of the existing antipollution flashover coatings. In this paper, a superhydrophobic polyurea coating with antipollution flashover ability was fabricated through chemically grafting the silica onto the chains of polyurea by utilizing silane coupling agent and hydrophobic modification. It is demonstrated that the coating exhibits outstanding antipollution flashover performances. Noteworthy, the surface pollution flashover voltage has been increased by 33.8% compared with the room temperature vulcanizing silicone rubber (RTV silicone rubber). In addition, the volume resistivity is above 1.0 × 1012 Ω·m, and the dielectric strength achieves to 28.85 kV/mm, which represents excellent insulating property. Furthermore, the superhydrophobic polyurea coating exhibits outstanding abrasion resistance, adhesion, acid-base resistance, and durability. As a result, it holds great promise for use in preventing pollution flashover in electrical insulators.
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Affiliation(s)
- Xu Li
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xinyu Tan
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Weifeng Chen
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Ting Xiao
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xinyi Li
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Lihua Jiang
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Shuangquan Liu
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Xin Tan
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
| | - Tao Li
- Hubei Provincial Engineering Technology Research Center for Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
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Srikrishnarka P, Kumaran D, Kini AR, Kumar V, Nagar A, Islam MR, Nagarajan R, Pradeep T. Observing Real-Time Adhesion of Microparticles on Glass Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17071-17079. [PMID: 37971209 DOI: 10.1021/acs.langmuir.3c01856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Fouling on glass surfaces reduces the solar panel efficiency and increases water consumption for cleaning. Superhydrophobic coatings on glass enable self-cleaning by allowing water droplets to carry away dirt particles. Observing the interaction between charged particles and surfaces provides insights into effective cleaning. Using a high-speed camera and a long-distance objective, we analyzed the in situ deposition of variously functionalized and charged silica dust microparticles on chemically treated glass. The ambient charges for the control, hydrophobic, and positively charged particles were approximately -0.5, -0.13, and +0.5 nC, respectively. We found that a positively charged particle of 2.3 ± 1.2 μm diameter adhered to hydroxylated glass in ∼0.054 s, compared to 0.40 and 0.45 s for quaternary ammonium- and fluorosilane-functionalized hydrophobic glass. Experiments suggest that quaternary ammonium-functionalized glass surfaces are about 77.8% more resistant to soiling than bare surfaces.
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Affiliation(s)
- Pillalamarri Srikrishnarka
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Dhivyaraja Kumaran
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India
| | - Amoghavarsha Ramachandra Kini
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Vishal Kumar
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Ankit Nagar
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Md Rabiul Islam
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Ramamurthy Nagarajan
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Thalappil Pradeep
- DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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Huang W, Jiang X, Zhang Y, Tang Z, Sun Z, Liu Z, Zhao L, Liu Y. Robust superhydrophobic silicone/epoxy functional coating with excellent chemical stability and self-cleaning ability. NANOSCALE 2023; 15:17793-17807. [PMID: 37916998 DOI: 10.1039/d3nr04062c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Superhydrophobic surfaces have attracted broad attention because of their unique water repellency but are restricted by poor wear resistance, weak adhesion to the substrate, and complex fabrication processes. Herein, a double-layer coating strategy consisting of the amino fluorine-silicone resin/epoxy resin (AFSR/EP) system is created. The system features a high hardness and transparent hydrophobic interface adhesive layer through the amine-epoxy "click" chemical reaction. The environmentally friendly resin system and low-cost nano-silica particles (n-SiO2) are composited and sprayed onto the substrate surface to form a superhydrophobic layer with outstanding robustness and excellent environmental stability. The prepared AFSR/EP@n-SiO2 composite coatings have a water contact angle of 161.1° and a sliding angle of 3.4°, demonstrating high superhydrophobic properties. Benefitting from the complementary advantages of silicone/epoxy resin, the prepared composite coatings maintain remarkable water repellency after various harsh environmental tests, including cyclic mechanical abrasion and tape-stripping, acid-base (pH 1 and pH 14) treatment, 10 wt% NaCl (pH 7) salt solution immersion, temperature treatment, knife scratching, and long-term ultraviolet radiation treatment, showing reinforced mechanical robustness and durable anti-corrosion stability. Notably, surface hardness of 5H and optical transparency over 80% can be achieved. The simple method offers a novel approach for the large-scale preparation of multifunctional superhydrophobic coatings.
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Affiliation(s)
- Weidong Huang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Xiaoli Jiang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Yagang Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Zhiqiang Tang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Zicai Sun
- Dongguan Yimei Material Technology Co., Ltd., Dongguan, 523000, China
| | - Zhijun Liu
- Dongguan Yimei Material Technology Co., Ltd., Dongguan, 523000, China
| | - Lin Zhao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Yanxia Liu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.
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Kalmoni JJ, Heale FL, Blackman CS, Parkin IP, Carmalt CJ. A Single-Step Route to Robust and Fluorine-Free Superhydrophobic Coatings via Aerosol-Assisted Chemical Vapor Deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37216613 DOI: 10.1021/acs.langmuir.3c00554] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Robust fluorine-free superhydrophobic films were produced from a mixture of two fatty acids (stearic acid and palmitic acid), SiO2 nanoparticles, and polydimethylsiloxane. These simple and nontoxic compounds were deposited via aerosol-assisted chemical vapor deposition to provide the rough topography required for superhydrophobicity, formed through island growth of the aggregates. The optimum conditions for well-adhered superhydrophobic films produced films with a highly textured morphology, which possessed a water contact angle of 162 ± 2° and a sliding angle of <5°. Superhydrophobicity was maintained after ultraviolet exposure (14 days at 365 nm), heat treatment (5 h at 300 °C and 5 h at 400 °C), 300 tape peel cycles, and exposure to ethanol and toluene (5 h each).
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Affiliation(s)
- Julie Jalila Kalmoni
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Frances L Heale
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Christopher S Blackman
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Ivan P Parkin
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Claire J Carmalt
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
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Wei J, Zhang J, Cao X, Huo J, Huang X, Zhang J. Durable superhydrophobic coatings for prevention of rain attenuation of 5G/weather radomes. Nat Commun 2023; 14:2862. [PMID: 37208369 DOI: 10.1038/s41467-023-38678-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/09/2023] [Indexed: 05/21/2023] Open
Abstract
Superhydrophobic coatings are expected to solve the rain attenuation issue of 5G radomes. However, it is very challenging to design and construct such superhydrophobic coatings with good impalement resistance, mechanical robustness, and weather resistance, which remains as one of the main bottlenecks hindering their practical applications. Here, we report the design of superhydrophobic coatings with all these merits mentioned above by spray-coating a suspension of adhesive/fluorinated silica core/shell microspheres onto substrates. The core/shell microspheres are formed by phase separation of the adhesive and adhesion between the adhesive and fluorinated silica nanoparticles. The coatings have an approximately isotropic three-tier hierarchical micro-/micro-/nanostructure, a dense but rough surface at the nanoscale, and chemically inert composition with low surface energy. Consequently, the coatings show excellent impalement resistance, mechanical robustness and weather resistance compared with previous studies, and the mechanisms are revealed. Furthermore, we realize large-scale preparation, extension, and practical application of the coatings for efficiently preventing rain attenuation of 5G/weather radomes. By taking these advantages, we believe that the superhydrophobic coatings have great application potential and market prospect. The findings here will boost preparation and real-world applications of superhydrophobic coatings.
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Affiliation(s)
- Jinfei Wei
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Jiaojiao Zhang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Xiaojun Cao
- Shandong Xinna Superhydrophobic New Materials Co. Ltd., 265402, Yantai, PR China
| | - Jinhui Huo
- Shandong Xinna Superhydrophobic New Materials Co. Ltd., 265402, Yantai, PR China
| | - Xiaopeng Huang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Junping Zhang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 100049, Beijing, PR China.
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Liu M, Tan X, Li X, Geng J, Han M, Chen X. Transparent superhydrophobic EVA/SiO2/PTFE/KH-570 coating with good mechanical robustness, chemical stability, self-cleaning effect and anti-icing property fabricated by facile dipping method. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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