Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.7
3.4
Journals
Coatings
Special Issues
Functional Films/Coatings Processing Technologies: Deposition and Process
share announcement

Functional Films/Coatings Processing Technologies: Deposition and Process

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 8205

Special Issue Editor

Dr. Simona Căprărescu

E-Mail Website
Guest Editor
Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, Bucharest, Romania
Interests: polymers; biopolymers; membranes; wastewater; pollutants; hybrid films; electrochemistry; corrosion; membrane separation processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is our pleasure and honor to invite you to submit your contribution to this Special Issue entitled “Functional Films/Coatings Processing Technologies: Deposition and Process”.

In recent years, films/coatings technologies have undergone rapid and significant developments due to their applications in many fields, such as electronics, automotive, aerospace and defense, construction, textile, and medical industries. Numerous factors play an important role in the realization of films/coatings with unique physical and functional properties, including the quality of composition, method of application, substrate, and their surface conditions. Several techniques can be used to produce films/coatings based on nanostructured materials or composites, such as sol-gel process, sputtering, electron beam evaporation, dip-coating, chemical vapor deposition, chemical bath deposition, atmospheric plasma, and atomic layer deposition. Films and coatings created through surface functionalization can ensure health safety, mechanical, thermal and barrier properties and durability. This Special Issue provides an opportunity to share surface-related science and engineering topics regarding functional films/coatings in an interactive and interdisciplinary manner.

The aim of this Special Issue is to publish high-quality research papers and review papers that address current and future advancements in the preparation and characterization of functional films/coatings for applications in diverse fields of engineering applications (e.g., aerospace, electronics, ships, and building), optoelectronic and photonic applications, supercapacitor potential applications, and other industries. Original research and reviews that have not yet been published or that are not currently under review by other journals are invited to be submitted.

In particular, the topics of interest include but are not limited to:

  • Novel processing technologies;
  • Films/coatings for obtaining special functions;
  • Coatings for extreme environmental conditions (e.g., for high/low temperatures or aggressive environments);
  • Structure-property relationships;
  • Advances in synthesis and preparation;
  • Novel strategies of self-healing corrosion protection systems;
  • Corrosion protection mechanisms through passive films/coatings.
  • Any other aspects of functional films/coatings.

Dr. Simona Căprărescu
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)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

16 pages, 6100 KiB  
Article
Influence of HNT-ZnO Nanofillers on the Performance of Epoxy Resin Composites for Marine Applications
by Raluca Şomoghi, Sonia Mihai, George-Mihail Teodorescu, Zina Vuluga, Augusta Raluca Gabor, Cristian-Andi Nicolae, Bogdan Trică, Daniel Mihai Stănescu Vătău, Florin Oancea and Cătălin Marian Stănciulescu
Coatings 2024, 14(5), 532; https://doi.org/10.3390/coatings14050532 - 25 Apr 2024
Viewed by 199
Abstract
Epoxy resin was conjugated with halloysite nanotubes (HNT) and different types of ZnO nanoparticles (commercial ZnO and modified ZnO-ODTES) to obtain HNT-ZnO/epoxy resin composites. These ZnO nanoparticles (ZnO NPs) were utilized with the intention to enhance the interfacial bonding between the epoxy resin [...] Read more.
Epoxy resin was conjugated with halloysite nanotubes (HNT) and different types of ZnO nanoparticles (commercial ZnO and modified ZnO-ODTES) to obtain HNT-ZnO/epoxy resin composites. These ZnO nanoparticles (ZnO NPs) were utilized with the intention to enhance the interfacial bonding between the epoxy resin and the reinforcing agent (HNT). The properties of resulted epoxy resin composites were characterized by various methods such as FTIR-ATR, TGA, DSC, TEM-EDX, and Nanoindentation analyses. The thermal properties of the epoxy resin composites were enhanced to a greater extent by the addition of HNT-ZnO nanofillers. DSC testing proved that the modification in the glass transition temperature can be due to the physical bonding between the epoxy resin and filler (HNT and/or ZnO). It was seen that the epoxy resin modified with HNT and ZnO-ODTES has the highest resistance to scratching by having a good elastic recovery as well as high values for surface hardness (~187.6 MPa) and reduced modulus (2980 MPa). These findings can pave the way for the developing of ZnO-based marine coatings with improved properties. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

9 pages, 11133 KiB  
Communication
Effect of Process Pressure on Carbon-Based Thin Films Deposited by Cathodic Arc on Stainless Steel for Bipolar Plates
by Maximilian Steinhorst, Maurizio Giorgio, Teja Roch and Christoph Leyens
Coatings 2023, 13(11), 1962; https://doi.org/10.3390/coatings13111962 - 17 Nov 2023
Viewed by 890
Abstract
In this study, three carbon-based coating variants were deposited onto stainless steel substrates, and the process pressure during the carbon layer deposition was varied. We conducted Raman spectroscopy, transmission electron microscopy, interfacial contact resistance measurements, and potentiodynamic polarization tests to examine the effect [...] Read more.
In this study, three carbon-based coating variants were deposited onto stainless steel substrates, and the process pressure during the carbon layer deposition was varied. We conducted Raman spectroscopy, transmission electron microscopy, interfacial contact resistance measurements, and potentiodynamic polarization tests to examine the effect of the process pressure on the properties of the coatings. The structural characterization revealed that all specimens exhibit a highly sp2-bonded structure. However, some structural differences could also be identified. In the TEM cross-section images of the carbon layer variants, these structural differences could be observed. The carbon layer deposited at 0.98 Pa has some distortions in the mainly perpendicular graphitic structure, which agrees with the Raman results. Almost completely vertically oriented graphitic layers exhibit the 0.1 Pa coating variant with a d-spacing similar to pure graphite. Regarding the contact resistance, the process pressure has only minor influence. All coatings variants have very low resistance values below 3 mΩ cm2, even at a compaction force of 50 N cm−2, which can be attributed to the graphite-like structure. The polarization tests show that the corrosion resistance increases with increasing process pressure. The best coating variant has a corrosion current density of approximately 10−8 A cm−2 and almost 10−6 A cm−2 at room temperature and 80 °C, respectively. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

17 pages, 3585 KiB  
Article
Cu Metallization of Al2O3 Ceramic by Coating Deposition from Cooled- and Hot-Target Magnetrons
by Andrey V. Kaziev, Dobrynya V. Kolodko, Vladislav Yu. Lisenkov, Alexander V. Tumarkin, Maksim M. Kharkov, Nikolay N. Samotaev and Konstantin Yu. Oblov
Coatings 2023, 13(2), 238; https://doi.org/10.3390/coatings13020238 - 19 Jan 2023
Cited by 2 | Viewed by 1803
Abstract
We examined the feasibility of alumina substrate metallization by magnetron deposition of copper coatings with thickness of several tens µm for its prospective applications in production of ceramic PCBs and packaging. The films were prepared in magnetron sputtering systems with cooled and thermally [...] Read more.
We examined the feasibility of alumina substrate metallization by magnetron deposition of copper coatings with thickness of several tens µm for its prospective applications in production of ceramic PCBs and packaging. The films were prepared in magnetron sputtering systems with cooled and thermally insulated (hot) targets. Substrates with different geometries were used, including those with through-holes. Thickness, adhesive properties, and electrical resistivity of produced coatings were analyzed. If the film thickness exceeded ~20 µm, we observed its systematic delamination, unless the dedicated CuxOy sub-layer of was introduced between the substrate and the main Cu film. Intermediate copper oxide films were investigated separately by SEM, EDS, and XRD methods, and deposition conditions for predominant growth of favorable tenorite CuO were determined. Prepared composite two-layer CuO + Cu coatings with total thickness of ~100 µm demonstrated good adhesion to alumina substrates in scratch-testing and performed much better than Cu-only films both in soldering and thermal cycling tests. We discuss an approach for constructing a reliable metallizing coating by plasma-assisted PVD methods that could be beneficial for complex-shaped ceramic PCBs and packaging. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

13 pages, 5284 KiB  
Article
In Situ Deposition of Reduced Graphene Oxide on Ti Foil by a Facile, Microwave-Assisted Hydrothermal Method
by Carmen Lazau, Mircea Nicolaescu, Corina Orha, Aniela Pop, Simona Căprărescu and Cornelia Bandas
Coatings 2022, 12(12), 1805; https://doi.org/10.3390/coatings12121805 - 23 Nov 2022
Cited by 5 | Viewed by 1044
Abstract
Reduced graphene oxide (rGO) was successfully deposited in situ onto Ti foil via a microwave-assisted hydrothermal method for the development of Ti-TiO2-rGO composite structures. The TiO2 crystallin layer was produced by the thermal oxidation of titanium foil in the presence [...] Read more.
Reduced graphene oxide (rGO) was successfully deposited in situ onto Ti foil via a microwave-assisted hydrothermal method for the development of Ti-TiO2-rGO composite structures. The TiO2 crystallin layer was produced by the thermal oxidation of titanium foil in the presence of 0.5 M hydrofluoric acid in a controlled atmosphere consisting of a mixed flow gas of Ar and O2 at 500 °C. A great advantage of using the microwave-assisted hydrothermal method for obtaining composite structures is the fast and uniform heating mode, which prevents the aggregation of graphene layers. Specific analyses, such as X-ray diffraction, UV-VIS analysis, and SEM morphology, were used to investigate the structural, optical, and morphological characteristics of the composites. The I-V measurements of the Ti-TiO2-rGO composite structures were performed using forward bias with an applied voltage between −3 V and +3 V and a step rate of 10 mV/s. Moreover, the electrochemical behavior was obtained by cyclic voltammetry in a 1 M KNO3 supporting electrolyte and in the presence of 4 mM K3Fe(CN)6 to determine the electroactive surface area and apparent diffusion coefficient. The charge transfer resistance was investigated via electrochemical impedance spectroscopy (EIS) in a 0.1 M Na2SO4 supporting electrolyte and within a frequency range of 100 kHz to 0.1 Hz to confirm the role of rGO on the electrode’s surface. This study provided new insights into the development of high-performance and cost-effective Ti-TiO2-rGO structures both for the development of electrochemical electrodes and gas sensors. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

17 pages, 18900 KiB  
Article
Development of the Zn-ZnO(Nw)@CuMnO2 Heterojunction by Low Temperature Zn Foil Oxidation for Gas Sensor Fabrication
by Mircea Nicolaescu, Cornelia Bandas, Corina Orha, Violeta Purcar and Carmen Lazau
Coatings 2022, 12(11), 1630; https://doi.org/10.3390/coatings12111630 - 27 Oct 2022
Cited by 4 | Viewed by 1682
Abstract
In this study, the Zn-ZnO(Nw)@CuMnO2 heterostructure was successfully achieved by deposition of a bidimensional CuMnO2 film on the ZnO nanowires (NWs) layer, by the spin coating method. The novelty of this research is related to the growth of ZnO NWs by [...] Read more.
In this study, the Zn-ZnO(Nw)@CuMnO2 heterostructure was successfully achieved by deposition of a bidimensional CuMnO2 film on the ZnO nanowires (NWs) layer, by the spin coating method. The novelty of this research is related to the growth of ZnO NWs by thermal oxidation at low temperatures, below the melting point of the Zn foil in a controlled atmosphere consisting of a mixed flow gas, Ar and O2. The structural and morphological properties of the heterostructures were assessed by XRD, UV-Vis, and SEM techniques. The as-obtained gas sensors based on Zn-ZnO(Nw)@CuMnO2 heterostructures were tested to detect 400 ppm. CO2 concentration at variable testing temperatures inside the testing chamber. The maximum sensibility value of 85.5% was obtained at the lowest operating temperature of 150 °C for the ZnONw5@CMO sensor, and when the temperature was increasing to 200 °C the sensibility response of 95.4% was recorded for the ZnONw7@CMO sensor. Current-voltage and current-time measurements were performed under different conditions to assess the heterojunction behavior and sensibility of the gas sensor. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

13 pages, 2711 KiB  
Article
Investigation of Hybrid Films Based on Fluorinated Silica Materials Prepared by Sol–Gel Processing
by Violeta Purcar, Valentin Rădiţoiu, Florentina Monica Raduly, Alina Rădiţoiu, Simona Căprărescu, Adriana Nicoleta Frone, Cristian-Andi Nicolae and Mihai Anastasescu
Coatings 2022, 12(10), 1595; https://doi.org/10.3390/coatings12101595 - 20 Oct 2022
Cited by 1 | Viewed by 1894
Abstract
In this research, fluorinated silica materials were prepared through sol–gel processing with tetraethylorthosilicate (TEOS), triethoxymethylsilane (MTES), and trimethoxyhexadecylsilane (HDTMES), using a fluorinated solution (FS) under acidic medium. The fluorinated solution (FS) was obtained by diluting the perfluorooctanoic acid (PFOA) in 2-propanol. These fluorinated [...] Read more.
In this research, fluorinated silica materials were prepared through sol–gel processing with tetraethylorthosilicate (TEOS), triethoxymethylsilane (MTES), and trimethoxyhexadecylsilane (HDTMES), using a fluorinated solution (FS) under acidic medium. The fluorinated solution (FS) was obtained by diluting the perfluorooctanoic acid (PFOA) in 2-propanol. These fluorinated sol–gel silica materials were placed on the glass surfaces in order to achieve the antireflective and hydrophobic fluorinated hybrid films. The structure and surface properties of the final samples were investigated by Fourier transform infrared spectroscopy (FTIR), ultraviolet/visible spectroscopy, thermogravimetric analysis (TGA), atomic force microscopy (AFM), and contact angle (CA) determinations. FTIR spectra demonstrated the presence of a silica network modified with alkyl and fluoroalkyl groups. Thermal analysis showed that the fluorinated sol–gel silica materials prepared with HDTMES have a good thermostability in comparison with other samples. Ultraviolet/visible spectra indicated that the fluorinated hybrid films present a reflectance of ~9.5%, measured at 550 nm. The water contact angle analysis found that the wettability of fluorinated hybrid films was changed from hydrophilic (64°) to hydrophobic (~104°). These hybrid films based on fluorinated sol–gel silica materials can be useful in various electronics and optics fields. Full article
(This article belongs to the Special Issue Functional Films/Coatings Processing Technologies: Deposition and Process)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-6
Back to TopTop