Hydrophobic and Anti-icing Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 9486

Special Issue Editors


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Guest Editor
School of Electrical Engineering, Chongqing University, Chongqing, China
Interests: external electrical insulation under complex atmospheric conditions; anti-icing coating; superhydrophobic coating

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Guest Editor
State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment, State Grid Corporation of China, Changsha, China
Interests: anti-icing materials; fire-retardant materials; disaster prevention and mitigation technology for electric power equipment; battery materials

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Guest Editor
Electric Power Research Institute, China Southern Power Grid Corporation, Guangzhou, China
Interests: anti-icing materials; transmission line new conductor; disaster prevention and mitigation technology
School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Interests: anti-icing coating; superhydrophobic coating; self-healable coating; smart coating; self-powered materials; anti-corrosive coating; supercapacitor

Special Issue Information

Dear Colleagues,

Icing is a ubiquitous and unavoidable phenomenon that occurs in nature through various means such as frosting, condensation freezing, and frozen rain. It is a longstanding problem that disrupts human society through impacts on many aspects of our daily life. For instance, ice formation and accumulation can cause mechanical failures in vehicles and aircraft; structural damage found in wind turbines, residential houses, and power lines; and optical malfunction in telescope lens and windows. Icing also has a long history of creating life-threatening hazards, ranging from slipping accidents to traffic collisions. All of these icing-induced problems present many challenges and lead to a great demand for developing anti-icing strategies.

Therefore, we would like to invite you to submit your original research to this Coatings Special Issue entitled “Hydrophobic and Anti-Icing Coatings”. The goal of this Special Issue includes all aspects of research related to hydrophobic and anti-icing coatings, including theoretical and application-oriented papers, experimental and numerical studies, case studies, and reviews.

We encourage you to send manuscripts containing scientific findings within the broad fields of coatings. Specific topics of interest include but are not limited to:

  • Anti-icing coatings
  • Superhydrophobic coatings
  • Artificial and natural icing
  • Self-healable coatings
  • Experimental testing
  • Numerical modeling
  • Icing flashover
  • Icing forecast
  • Bionic deicing
  • Sustainable coatings
  • Anticorrosive coatings
  • Testing method
  • Insulation materials
  • Thermal conductive materials
  • Electrical contact materials
  • Composite materials

Prof.Dr. Xingliang Jiang
Prof. Dr. Baohui Chen
Prof. Dr. Yongli Liao
Dr. Peng Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (6 papers)

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Research

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11 pages, 2149 KiB  
Article
Preparation of Durable Superhydrophobic Coatings Based on Discrete Adhesives
by Xuejuan Liu, Zhiguo Zhou, Ming Chen, Zheng Liu, Shuhui Jiang and Lei Wang
Coatings 2024, 14(4), 463; https://doi.org/10.3390/coatings14040463 - 11 Apr 2024
Viewed by 390
Abstract
Due to the low adhesion observed at the interface between solid and liquid, superhydrophobic coatings hold significant promise for various applications, such as self-cleaning, anti-corrosion, anti-icing, and drag reduction. However, a notable challenge hindering their widespread adoption in these domains lies in their [...] Read more.
Due to the low adhesion observed at the interface between solid and liquid, superhydrophobic coatings hold significant promise for various applications, such as self-cleaning, anti-corrosion, anti-icing, and drag reduction. However, a notable challenge hindering their widespread adoption in these domains lies in their delicate durability. In this study, we propose a straightforward method for preparation. The fluorosilicone resin is initially discretized through a gradual introduction of nonsolvent into its solution, followed by thorough mixing and stirring with silica nanoparticles. The resulting mixture is then sprayed onto the substrate surface after drying, forming a self-similar, porous, and rough structure extending from top to bottom. This process yields a coating exhibiting excellent chemical and mechanical durability simultaneously. Using this approach, we achieved a superhydrophobic coating with a contact angle of 156° and a roll angle of 2.2°, with water droplet adhesion of only 10.8 ± 0.4 µN. Remarkably, the coating maintained excellent superhydrophobicity even after undergoing sandpaper abrasion (10 m), tape peeling (30 times), and prolonged water impact (60 min), showing its robust mechanical stability. Furthermore, following exposure to acid, alkali, and aqueous solutions (7 days), UV irradiation (10 days), and extreme temperature variations (–20 °C to 80 °C), the coatings retained their superhydrophobic properties and exhibited good chemical durability. This method offers a novel approach to enhance the durability and practicality of superhydrophobic coatings. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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12 pages, 6816 KiB  
Article
Preparation of Wear-Resistant Superhydrophobic Coatings Based on a Discrete-Phase Adhesive
by Xuejuan Liu, Zhenxia Shi, Lin Lin, Xiaolan Shang, Jing Wang, Chunyan Xie and Lei Wang
Coatings 2023, 13(4), 682; https://doi.org/10.3390/coatings13040682 - 27 Mar 2023
Viewed by 1294
Abstract
Among the many methods to prepare superhydrophobic coatings, the liquid spraying method has the advantages of simple operation, low equipment and substrate requirements, and a low cost to achieve large-scale industrialization. However, superhydrophobic coatings prepared using the existing one-step and two-step spraying methods [...] Read more.
Among the many methods to prepare superhydrophobic coatings, the liquid spraying method has the advantages of simple operation, low equipment and substrate requirements, and a low cost to achieve large-scale industrialization. However, superhydrophobic coatings prepared using the existing one-step and two-step spraying methods are not wear resistant, and the failure mechanism is also not clear. After preparing coatings using existing methods and conducting wear tests, we show that the reason for their lack of wear resistance is the excessive bonding caused by the nanoparticles embedded in the continuous-phase adhesive, or the low bonding caused by adhesion to the adhesive surface. Based on the above conclusion, we propose a method to transform a continuous-phase adhesive into a discrete-phase adhesive via phase separation, after which it is mixed with nanoparticles for spraying. This new method allows the nanoparticles to bond to the adhesive while avoiding embedding, which avoids the shortcomings of existing methods. Consequently, coatings fabricated using the new method have better wear resistance properties and important significance for practical applications. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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24 pages, 3629 KiB  
Article
Evaluation of Success of Superhydrophobic Coatings in the Oil and Gas Construction Industry Using Structural Equation Modeling
by Ahsan Waqar, Idris Othman, Krzysztof Skrzypkowski and Ali Shaan Manzoor Ghumman
Coatings 2023, 13(3), 526; https://doi.org/10.3390/coatings13030526 - 27 Feb 2023
Cited by 15 | Viewed by 1553
Abstract
In the oil and gas construction industry, the adoption of superhydrophobic coatings is still in the early adoption phase. Due to the lack of research and the importance of hydrophobic coatings in the oil and gas construction business, this study examined the success [...] Read more.
In the oil and gas construction industry, the adoption of superhydrophobic coatings is still in the early adoption phase. Due to the lack of research and the importance of hydrophobic coatings in the oil and gas construction business, this study examined the success determinants of superhydrophobic coatings in Malaysia. This quantitative study included a pilot survey to assess questionnaire validity and Exploratory Factor Analysis (EFA) to reduce success variables discovered through a literature review. A structural equation modeling (SEM) approach was used to develop a model involving success factors of superhydrophobic coatings in the oil and gas construction industry of Malaysia. Four constructs in total were found in SEM, namely, performance success, sustainability construct, oil spill management, and safety and economic success. In total, five items were excluded from the model because their loading factors were less than 0.6. All Cronbach Alpha reliability constants were greater than 0.7, the composite reliability indicators were greater than 0.8, and the AVE was greater than 0.6 for all of the constructs, confirming acceptable reliability and validity statistics. Both convergent and discriminant validity confirmed the relationships between all constructs and the latent variable. The observed path coefficients between the constructs and the latent variable were 0.476 for performance success, 0.461 for sustainability success, 0.322 for oil spill management, and 0.242 for safety and economic success. The significance value for all of the constructs was less than 0.05, confirming the strong relationship between the constructs and the critical success of superhydrophobic coatings in the oil and gas industry. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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22 pages, 9848 KiB  
Article
Functional Olive Pit Powders: The Role of the Bio-Based Filler in Reducing the Water Uptake Phenomena of the Waterborne Paint
by Massimo Calovi and Stefano Rossi
Coatings 2023, 13(2), 442; https://doi.org/10.3390/coatings13020442 - 15 Feb 2023
Cited by 5 | Viewed by 1967
Abstract
In this study, olive pit powders were added to a polyurethane-acrylate paint for examining the impact of two alternative functionalization processes in increasing the filler hydrophobicity in an effort to increase the durability of the paint. In order to look into potential changes [...] Read more.
In this study, olive pit powders were added to a polyurethane-acrylate paint for examining the impact of two alternative functionalization processes in increasing the filler hydrophobicity in an effort to increase the durability of the paint. In order to look into potential changes in morphology and appearance owing to the surface conversion treatments of the two bio-based additives, the coatings were examined using electron microscopy and colorimetric tests. The coating’s resilience and the hydrophobic/hydrophilic role of the fillers were evaluated by salt spray chamber exposure, contact angle measurements, paint liquid resistance, UV-B exposure, and electrochemical impedance spectroscopy measurements, which highlighted the reduction in water absorption inclination of the filler made of lignocellulose due to the silane and wax functionalization. This study demonstrated that the bio-based filler, if properly functionalized, can actually be implemented as multifunctional pigment in waterborne paints, giving specific aesthetic characteristics, but also improving the barrier performance of the polymeric matrix and increasing the durability of the composite coating. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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15 pages, 8463 KiB  
Article
Effects of Static Icing on Flashover Characteristics of High-Speed Train Roof Insulators
by Zhibin Qi, Ruiping Zhang, Jianqiao Ma, Xiangfei Wang, Lei Ma, Zongyu Zhao and Youqiang Wu
Coatings 2022, 12(7), 950; https://doi.org/10.3390/coatings12070950 - 04 Jul 2022
Cited by 3 | Viewed by 1298
Abstract
To study the icing flashover characteristics displayed by insulators on the roof of a high-speed train at a low-speed or static state, an environment with a low temperature and high humidity is established in the artificial climate chamber to carry out the icing [...] Read more.
To study the icing flashover characteristics displayed by insulators on the roof of a high-speed train at a low-speed or static state, an environment with a low temperature and high humidity is established in the artificial climate chamber to carry out the icing flashover test of composite insulator under a static state. The results of the study indicate the presence of ice ridges bridging the sheath at the edge of the sheath when the ambient wind speed is less than 2m/s. The arc appears firstly at the end of the ice ridge, and it is likely that the arc at the adjacent tip converges in the air and then further extends to the edge of the next sheath. The arc melts the ice ridges at the end and enables it to stick to the tip of the ice ridge in the form of water droplets, and therefore the existence of droplets results in the distortion of the electric field near them. Moreover, the elongation of droplets and the bridging of ice edges accelerate the process of flashover. The research results can offer a reference to the structural optimization design of anti-icing insulators for high-speed trains in the future. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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Review

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9 pages, 1555 KiB  
Review
The Perspectives of Hydrophobic Coatings for Mitigating Icing on Atmospheric Structures
by Xingliang Jiang, Yizhi Zhuo, Peng Wang, Mengyu Yang, Yongli Liao and Baohui Chen
Coatings 2023, 13(2), 326; https://doi.org/10.3390/coatings13020326 - 01 Feb 2023
Viewed by 1562
Abstract
Ice accumulation on atmospheric structures will result not only in inconvenience to human activities, but also various catastrophic events. Many anti-icing coatings have been developed for anti-ice accretion on various atmospheric structures. However, such mitigating icing performances and developments in practical applications are [...] Read more.
Ice accumulation on atmospheric structures will result not only in inconvenience to human activities, but also various catastrophic events. Many anti-icing coatings have been developed for anti-ice accretion on various atmospheric structures. However, such mitigating icing performances and developments in practical applications are restricted by various factors. Therefore, current mitigating icing coatings are far from practical implementation. Rough and smooth hydrophobic coatings have demonstrated their potential for mitigating ice formation. To advance the development of mitigating icing coatings, a perspective of hydrophobic coatings for mitigating icing is in need. Herein, this paper categorizes the mitigating icing coatings by their wettability firstly. Then, we recap the state-of-the-art hydrophobic coatings for mitigating icing. Afterwards, we point out the deficiency and limitations of current coatings for anti-icing. At last, we provide a perspective of future trends and development directions. This perspective review can guide the design of mitigating icing coatings towards practical implementation. Full article
(This article belongs to the Special Issue Hydrophobic and Anti-icing Coatings)
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