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Coatings
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Functional Coatings of Porous Materials
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Functional Coatings of Porous Materials

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

Deadline for manuscript submissions: 20 May 2025 | Viewed by 13509

Special Issue Editors

Prof. Dr. Jiri Militky

E-Mail Website
Guest Editor
Department of Material Engineering, Technical University of Liberec, Liberec, Czech Republic
Interests: textile materials; sustainability; colorations; finishing; surface modifications
Special Issues, Collections and Topics in MDPI journals
Dr. Mohanapriya Venkataraman

E-Mail Website
Guest Editor
Department of Material Engineering, Faculty of Textile, Technical University of Liberec, 460 01 Liberec, Czech Republic
Interests: nanoparticle-rich surface structures; electrospun nanofibrous layers; porous materials surface coating; thermodynamic analysis of aerogels; thermal insulation materials; phase change materials; carbon-based materials; hybrid composite structures; surface coating of fibrous structures; hybrid composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

There is an increasing amount of interest in innovative products with special properties for which functional coatings of porous structures, typical for textile structures, and porous membranes are mainly being increasingly explored. These functional properties comprise enhanced thermal and electrical conductivity, water vapor transport, air permeability, electromagnetic shielding, self-cleaning, creating photocatalytic activity, antimicrobial functionality, friction, and surface hydrophobicity. The use of coatings, in addition to improving surface attachments of active particles and improving the durability of functional systems, also enables durable surface modifications of porous materials and minimizes the use of active particle-based materials. This Special Issue focuses on the functional coatings of porous materials that can create structures with enhanced properties. The topics of interest for this Special Issue, in particular, include (but are not restricted to):

  • Coatings for obtaining special functions;
  • Novel types of surface coatings (e.g., branched acids, crosslinkers, resins) to stabilize active particles on porous surfaces;
  • Coatings for extreme environmental conditions, e.g., for high/low temperatures, aggressive environments;
  • Nanocoatings using electrospinning/electrospraying;
  • Characterization of coating and functional effects durability under various operating conditions;
  • Special application of porous structures with functional coating;
  • Any other aspects of functional coatings.

Prof. Dr. Jiri Militky
Dr. Mohanapriya Venkataraman
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

  • nanocoatings
  • electrospinning
  • electrospraying
  • functional coatings
  • porous structures

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

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12 pages, 6743 KiB  
Article
Hierarchical Porous Activated Carbon Derived from Pleurotus Eryngii and the Influence of Pore Structural Parameters on Capacitance Performance
by Yudan Yuan, Yi Sun, Chenguang Liu, Li Yang and Cezhou Zhao
Coatings 2024, 14(7), 840; https://doi.org/10.3390/coatings14070840 - 4 Jul 2024
Viewed by 1079
Abstract
Hierarchical porous activated carbon derived from pleurotus eryngii was prepared by a one-step activation method. It was found that the specific surface area of the obtained sample increased with the increase in activation temperature (700–900 °C). The sample activated at 900 °C has [...] Read more.
Hierarchical porous activated carbon derived from pleurotus eryngii was prepared by a one-step activation method. It was found that the specific surface area of the obtained sample increased with the increase in activation temperature (700–900 °C). The sample activated at 900 °C has a specific surface area of 2002.2 m2 g−1 and the highest specific capacitance (319 F g−1), which is mainly attributed to the high utilization rate of specific surface area brought by the hierarchical porous structure. The assembled PEK-900//PEK-900 capacitor measured a specific capacity of 258 F g−1 at a current density of 0.5 A g−1. After 10,000 cycles of charging and discharging, the specific capacitance increased by 10%. Based on the correlation analysis of experimental data between the specific capacitance and pore structural parameters, Lasso dimensionality reduction and binary linear regression were used to reveal the relationship between the two. The residual sum of squares obtained by this method decreased by 38.4% compared to the univariate linear regression, providing a simple and reliable theoretical method for predicting the capacitance performance of biomass carbon materials. Full article
(This article belongs to the Special Issue Functional Coatings of Porous Materials)
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22 pages, 10377 KiB  
Article
Mechanical Properties of Multi-Sized Porous Thermal Barrier Coatings at Micro and Nano Scales after Long-Term Service at High Temperature
by Peihu Gao, Shengcong Zeng, Can Jin, Bo Zhang, Baiyang Chen, Zhong Yang, Yongchun Guo, Minxian Liang, Jianping Li, Wei Wang, Yongqing Lu, Lu Jia and Dan Zhao
Coatings 2022, 12(2), 165; https://doi.org/10.3390/coatings12020165 - 28 Jan 2022
Cited by 5 | Viewed by 2942
Abstract
Atmospheric plasma-sprayed multi-sized porous structures in thermal barrier coatings (TBCs) were constructed with hollow spherical (HOSP) 8YSZ powders and polypropylene pore formers. The mechanical properties of the multi-sized TBCs were investigated through the nanoindentation method as comparations of the as-sprayed coating and those [...] Read more.
Atmospheric plasma-sprayed multi-sized porous structures in thermal barrier coatings (TBCs) were constructed with hollow spherical (HOSP) 8YSZ powders and polypropylene pore formers. The mechanical properties of the multi-sized TBCs were investigated through the nanoindentation method as comparations of the as-sprayed coating and those serving at 1100 °C for a long-term. The results showed that the introduction of the multi-sized pores into TBCs could lead to the decrease of the hardness and modulus as well as the increase of fracture toughness. The hardness and modulus of the coating increased, and the fracture toughness of the coating decreased with the prolongation of the serving times at high temperatures. The mechanical properties of the coating became stable after 60 days’ serving at 1100 °C. The hardness, elastic modulus and fracture toughness of the TBCs increased to 6.51, 7.79, 10.04 GPa and 126.36, 135.13, 145.22 GPa as well as 1.049, 1.157, 1.255 MPa·m0.5, respectively, corresponding to the multi-sized porous TBCs with 0%, 10% and 15% PP powders. The nano-size pores disappeared gradually in the multi-sized TBCs during serving at 1100 °C. The macropores deposited between the ceramic particles penetrated with little diffusion and were not easy to disappear. The introduction of a multi-scale pore structure into the TBCs could improve the stress-strain tolerance of the TBCs. Full article
(This article belongs to the Special Issue Functional Coatings of Porous Materials)
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Review

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24 pages, 3241 KiB  
Review
Functional Coatings by Natural and Synthetic Agents for Insect Control and Their Applications
by Divan Coetzee, Jiri Militky and Mohanapriya Venkataraman
Coatings 2022, 12(4), 476; https://doi.org/10.3390/coatings12040476 - 31 Mar 2022
Cited by 9 | Viewed by 8220
Abstract
Insect repellent textiles offer protection against disease-causing vectors such as mosquitoes, flies, and ticks. Protection is based on the incorporation of insect repellent compounds present in plant oil derivatives or synthetic oils. The effectiveness and application of natural insect repellents such as citronella [...] Read more.
Insect repellent textiles offer protection against disease-causing vectors such as mosquitoes, flies, and ticks. Protection is based on the incorporation of insect repellent compounds present in plant oil derivatives or synthetic oils. The effectiveness and application of natural insect repellents such as citronella grass, lemongrass, rosemary, peppermint, holy basil, tea tree, neem, lavender, thyme, lemon eucalyptus, clove, and cinnamon oils, as well as synthetic compounds permethrin, allethrin, malathion, DEET, DETA, IR3535, and picaridin, are compared here. The insect repellent and insecticidal effectiveness of natural compounds in their pure form are very low due to their high volatility. The effectiveness has been greatly improved through slow-release systems such as encapsulation of the essential oils and is comparable to synthetic compounds used for insect control purposes. Due to the lasting toxicity of synthetic compounds to humans and the environment, the use of natural compounds should become a more preferred method of insect control. Full article
(This article belongs to the Special Issue Functional Coatings of Porous Materials)
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