Advanced Coatings for Surface Protection and Water/Oil Repellency

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

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 5634

Special Issue Editors


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Guest Editor
Department of Applied Sciences, Université du Québec à Chicoutimi, Pavillon principal, bureau P4-3280 555, boulevard de l'Université (Chicoutimi), Saguenay, QC G7H 2B1, Canada
Interests: superhydrophobic coatings and surface modification for reduction of ice adhesion, drag rduction, bio-fouling as well as medical applications; energy materials
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Applied Sciences, Université du Québec à Chicoutimi, Pavillon principal, bureau P4-3280 555, boulevard de l'Université (Chicoutimi), Saguenay, QC G7H 2B1, Canada
Interests: surface treatment (physical and chemical methods) and coatings in adhesion science
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Superhydrophobic and oleophobic surfaces are of paramount importance to the challenges faced today in protecting various surfaces in a range of applications, including aircraft parts and sensors, automotive and transportation systems, energy materials, medical devices, appliances, construction materials, oil–water separations, textiles, etc. Long-term surface protection and its easy maintenance is the biggest issue that scientists are striving to solve through significant and outstanding research and technology development. The fundamental approach to address these challenges in simple terms is the use of surface modification techniques. When it comes to protecting a surface from degradation due to corrosion and/or organic contaminants, it is the few nanometers or molecular layers on the surface that matter most. Therefore, surface modification becomes of tremendous importance, and it is there that nature and its wonders in have been particularly inspirational. The surfaces of plants (lotus leaves, hosts), insects (butterfly wings, striders), aquatic beings (fish scales, dolphin skins), and birds (duck feathers), to name a few, are some classic examples of motivators for replication on the surfaces of materials such as metals, ceramics, and polymers. Fabrication of these nature-inspired surfaces has seen great success in recent times; however, these technological achievements and advancements have been purely based on self-learning. There is a lack of academic training to the new generation via courses in universities in this important field of surface modification, superhydrophobic/oleophobic coatings, and adhesion science.

The aim of this Special Issue is to provide an international scientific platform for a wide range of experts and professionals in the field of surface modification and coatings, including researchers, academics, industrial experts, and professionals, to present the most recent technological achievements and advances from the perspective of providing education and sharing knowledge to help to stimulate the minds of the youngest generations to keep working in and contributing to this field. This Special Issue is open to novel, high-quality research contributions on both theoretical and experimental aspects related to surface modifications and interactions, as well as achieving superhydrophobic and oleophobic properties. We expect this Special Issue to open new pathways for further research and technology improvements in this important field.

Prof. Dr. D. K. Sarkar
Dr. N. Saleema
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.

Keywords

  • surface engineering/modification
  • surface–interface interactions
  • superhydrophobic coatings
  • oleophobic coatings
  • antibacterial properties
  • corrosion reductions
  • drag reductions
  • UV protection

Published Papers (3 papers)

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Research

11 pages, 4047 KiB  
Article
Robust Superhydrophobic Coatings for Enhanced Corrosion Resistance and Dielectric Properties
by Wentao Shao, Qi Kan, Xinxin Bai and Chengqian Wang
Coatings 2022, 12(11), 1655; https://doi.org/10.3390/coatings12111655 - 31 Oct 2022
Cited by 3 | Viewed by 1613
Abstract
Multifunctional super-repellent composite coatings play an important part in academic and industrial fields, while it is still a great challenge to effectively integrate a variety of functions into one material. Mg alloys having low density, high strength-to-weight ratio, and good shielding, are widely [...] Read more.
Multifunctional super-repellent composite coatings play an important part in academic and industrial fields, while it is still a great challenge to effectively integrate a variety of functions into one material. Mg alloys having low density, high strength-to-weight ratio, and good shielding, are widely used in electronic devices, while it is susceptible to sever corrosion especially in moist air and ocean atmosphere. Here, a versatile superhydrophobic coating with organic-inorganic hybrid structure and hierarchical surface textures, integrating robust wettability with design manipulation is synthesized by assembling modified SiO2 nanoparticles on polytetrafluoroethylene (PTFE) layer on the AZ31 Mg alloy. The composite coating has good water repellency with a contact angle of 170.5°, due to the micro/nano textures and low surface energy. The composite coating increases the corrosion potential of AZ31 Mg from −1.483 V to −1.243 V, and reduces the corrosion current density by 3 orders of magnitude. Remarkably, the superhydrophobic coating displays enticing damage-resistance (>40 cycles), superior environmental stability (thermal shock and outdoor placement) and self-cleaning function. Moreover, the composite coatings display excellent electrical properties with superior voltage resistance (>30 V/μm), and high resistivity (>1012 Ω∙cm), as well the coating has a low dielectric constant (≈3.91) and dielectric loss (0.0094), which are great advantages for the electronic or electrical engineering applications. We expect that the versatile super-repellent coating can be used as candidates for novel advanced energy materials, especially in harsh environments. Full article
(This article belongs to the Special Issue Advanced Coatings for Surface Protection and Water/Oil Repellency)
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9 pages, 2841 KiB  
Article
Effect of Humidity on the Thermal Properties of Aluminum Nanopowders with Different Surface Coatings
by Liangui Guo, Yulin Li, Wulin Song, Bianyang He, Mengli Yang and Lei Zhu
Coatings 2022, 12(8), 1147; https://doi.org/10.3390/coatings12081147 - 9 Aug 2022
Cited by 1 | Viewed by 1545
Abstract
To investigate the effect of surface coating materials on the humidity stability of aluminum (Al) nanopowders, three kinds of core–shell structure Al nanopowders with an Al2O3 passivation coating, carbon coating, and plasticizer dioctyl sebacate (DOS) coating were prepared through laser-induction [...] Read more.
To investigate the effect of surface coating materials on the humidity stability of aluminum (Al) nanopowders, three kinds of core–shell structure Al nanopowders with an Al2O3 passivation coating, carbon coating, and plasticizer dioctyl sebacate (DOS) coating were prepared through laser-induction complex heating method. After one year’s storage at 95% relative humidity, their thermal properties were tested through differential scanning calorimeter (DSC) and thermal gravimeter (TG) analysis. The results show that the thermal properties of Al2O3-passivated Al nanopowders are entirely lost under high humidity because the Al2O3 passivation coating is very sensitive to moisture. The thermal properties of carbon-coated Al nanopowders are not well-protected under a high humidity due to the uneven thickness and structural defects of carbon coatings. However, the thermal enthalpy of DOS-coated Al nanopowders remains at 3.56 KJ/g under high humidity, which indicates that an organic DOS coating with a hydrophobic nature has an excellent protective effect on the thermal properties of the Al nanopowders. Given the good forming performance of organic DOS coatings and other components of propellants, DOS-coated Al nanopowders are a kind of energetic material with potential application value. Full article
(This article belongs to the Special Issue Advanced Coatings for Surface Protection and Water/Oil Repellency)
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9 pages, 4659 KiB  
Article
Highly Water-Repellent and Anti-Reflective Glass Based on a Hierarchical Nanoporous Layer
by Shuntaro Minegishi, Nanako Ueda, Mizuki Saito, Junhwan Lee and Takuya Fujima
Coatings 2022, 12(7), 961; https://doi.org/10.3390/coatings12070961 - 7 Jul 2022
Cited by 1 | Viewed by 1741
Abstract
Optically anti-reflective and water-repellent glass is required for solar cell covers to improve power-generation efficiency due to transparency improvement and dirt removal. Research has been conducted in recent years on technologies that do not use fluorine materials. In this study, we focused on [...] Read more.
Optically anti-reflective and water-repellent glass is required for solar cell covers to improve power-generation efficiency due to transparency improvement and dirt removal. Research has been conducted in recent years on technologies that do not use fluorine materials. In this study, we focused on the anti-reflective properties and microstructure of hierarchical nanoporous layer (HNL) glass and used it as a substrate. As a result, we have achieved both strong anti-reflectivity and high water repellency on HNL glass by coating polydimethylsiloxane (PDMS) using baking and thermal chemical vapor deposition (CVD). The surfaces showed a significantly higher sliding velocity of water droplets than the PDMS-treated material on the flat glass plate. They also showed such water repellency that the droplets bounced off the surface. Full article
(This article belongs to the Special Issue Advanced Coatings for Surface Protection and Water/Oil Repellency)
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