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Wang Y, Zhang K, Cui X, Zhao Z, Wang Z, Liu G, Zhang Y, Zhu Y, Chen J, Sun S, Liu X, Chen H. A Transparent Photo/Electrothermal Composite Coating with Liquid-like Slippery Property for All-Day Anti-/De-Icing. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39069698 DOI: 10.1021/acsami.4c03683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
A photo/electrothermal surface can convert sunlight and electricity into heat to solve icing problems. The combination of active photo/electrothermal surfaces with passive slippery surfaces provides a highly efficient strategy for all-day anti/deicing. However, the lack of transparency remains a primary impediment to the widespread application of these anti-icing measures in photovoltaics, windshields, and other fields. Herein, we report a bilayer transparent photo/electrothermal coating with a liquid-like slippery property for all-day anti/deicing. The prepared coating exhibits ultraslippery, low ice adhesion, and enhanced stability properties through covalent grafting of polydimethylsiloxane (PDMS) brushes in a cross-linked skeleton of epoxy. Moreover, the coating demonstrates a visible transmittance of up to 77% and effectively absorbs ultraviolet and near-infrared light due to the addition of ultraviolet and infrared absorbers, resulting in a temperature increase under sun illumination. The bottom indium tin oxide layer is fabricated to provide the composite coating with electrothermal capability, so that it can achieve all-weather deicing. The coupling of photo/electrothermal and slippery properties can promote the rapid removal of grown ice in a short time. The slippery properties and their exceptional durability under mechanical, optical, and thermal conditions render the composite coatings highly promising for engineering applications.
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Affiliation(s)
- Yamei Wang
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Kaiteng Zhang
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Xianxian Cui
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Zehui Zhao
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
- Key Laboratory of Icing and Anti/De-icing, China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China
| | - Zelinlan Wang
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Guang Liu
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China
| | - Yi Zhang
- Group of Biomimetic Smart Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences & Shandong Energy Institute, Songling Road 189, Qingdao 266101, China
| | - Yantong Zhu
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Jichen Chen
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Shize Sun
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Xiaolin Liu
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
| | - Huawei Chen
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
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Phan CM, Nguyen CV, Nguyen HM. Measuring Tensile Strength of a Detergent‐Stabilized Soap Film. J SURFACTANTS DETERG 2021. [DOI: 10.1002/jsde.12536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chi M. Phan
- Department of Chemical Engineering Curtin University Perth Western Australia 6845 Australia
| | - Cuong V. Nguyen
- School of Chemical Engineering The University of Queensland Brisbane Queensland 4072 Australia
| | - Hoang M. Nguyen
- Department of Chemical Engineering Curtin University Perth Western Australia 6845 Australia
- Department of Chemical Engineering University of Science and Technology, the University of Danang Danang City 50608 Vietnam
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Cagna A, Esposito G, Quinquis AS, Langevin D. On the reversibility of asphaltene adsorption at oil-water interfaces. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Powell KC, Damitz R, Chauhan A. Relating emulsion stability to interfacial properties for pharmaceutical emulsions stabilized by Pluronic F68 surfactant. Int J Pharm 2017; 521:8-18. [PMID: 28192158 DOI: 10.1016/j.ijpharm.2017.01.058] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 01/12/2017] [Accepted: 01/28/2017] [Indexed: 11/19/2022]
Abstract
We explore mechanisms of emulsion stability for several systems using Pluronic F68 and a range of oils commonly used in pharmaceutics and cosmetics. We report measurements of dynamic emulsion drop size, zeta potential, and creaming time, as well as dynamic interfacial tension and interfacial viscoelasticity. Experiments show that with 1wt% Pluronic F68, soybean oil emulsions were the most stable with no creaming over six months, followed by isopropyl myristate, octanoic acid, and then ethyl butyrate. The eventual destabilization occurred due to the rising of large drops which formed through Ostwald ripening and coalescence. While Ostwald ripening is important, it is not the dominant destabilization mechanism for the time scale of interest in pharmaceutical emulsions. The more significant destabilization mechanism, coalescence, is reduced through surfactant adsorption, which decreases surface tension, increases surface elasticity, and adds a stearic hindrance to collisions. Though the measured values of elasticity obtained using a standard oscillatory pendant drop method did not correlate to emulsion stability, this is because the frequencies for the measurements were orders of magnitude below those relevant to coalescence in emulsions. However, we show that the high frequency elasticity obtained by fitting the surface tension data to a Langmuir isotherm has very good correlation with the emulsion stability, indicating that the elasticity of the interface plays a key role in stabilizing these pharmaceutical formulations. Further, this study highlights how these important high frequency elasticity values can be easily estimated from surface isotherms.
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Affiliation(s)
- Kristin Conrad Powell
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
| | - Robert Damitz
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
| | - Anuj Chauhan
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
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Karbaschi M, Taeibi Rahni M, Javadi A, Cronan C, Schano K, Faraji S, Won J, Ferri J, Krägel J, Miller R. Dynamics of drops – Formation, growth, oscillation, detachment, and coalescence. Adv Colloid Interface Sci 2015; 222:413-24. [PMID: 25466690 DOI: 10.1016/j.cis.2014.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 10/29/2014] [Accepted: 10/30/2014] [Indexed: 10/24/2022]
Abstract
Single drops or bubbles are frequently used for the characterization of liquid-fluid interfaces. Their advantage is the small volume and the various protocols of their formation. Thus, several important methods are based on single drops and bubbles, such as capillary pressure and profile analysis tensiometry. However, these methods are often applied under dynamic conditions, although their principles are defined under equilibrium conditions. Thus, specific attention has to be paid when these methods are used beyond certain limits. In many cases, computational fluid dynamics (CFD) simulations have allowed researchers, to extend these limits and to gain important information on the interfacial dynamics. Examples discussed here are the capillary pressure tensiometry used for short time and profile analysis tensiometry for long time dynamic interfacial tension measurements, the oscillating drop methods for measuring dilational visco-elasticity. For measuring the coalescence of two drops the liquid dynamics of the subsequently formed liquid bridges have to be considered. In this paper, a thorough review of important experimental and computational findings, related to the dynamics of drops, including its formation, growth, oscillation, detachment, and coalescence is presented. Emphasis is however on some selected important developments. In addition, the paper tries to predict the main directions of advancement in interfacial research for the near future.
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