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Dear Colleagues,

Nowadays, there is a strong emphasis on the development of smart and green coatings using the sol-gel method for different technological applications. Advanced and improved coatings for conventional applications are essential. At the same time, requests to produce coatings that fulfill the requirements of several novel high-tech applications are also needed.

The sol-gel method is a versatile process that allows the production of organic–inorganic hybrid coatings, tailored according to the application. To further improve the efficiency of this type of coatings, and to ensure reliability and long-term performance of coated materials, it is vital to exploit their full potential. This is only possible if the coating microstructure, and thermal and mechanical properties are well characterized.

This Special Issue will focus on the use of advanced techniques for the characterization of organic–inorganic hybrid sol-gel coatings. Emphasis will be given to chemical, microstructural, mechanical, and thermo-physical characterizations, as well as correlations between composition and microstructure of hybrid sol-gel materials. Understanding the complex structure–property relations in hybrid sol-gel coatings will allow furthering improvements to their performances.

With the purpose of highlighting some of the most stimulating challenges in coatings, material science, and technology, this Special Issue proposes to publish original research and review papers, from prominent investigators in the field, in both academia and industry.

Dr. Rita B. Figueira
Guest Editor

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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.

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Keywords

Characterization techniques
Sol-gel
Coatings
Nanomaterials
Hybrid
Surface protection

Published Papers (1 paper)

Research

3257 KiB

Open AccessArticle

Investigation of Coating Performance of UV-Curable Hybrid Polymers Containing 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Coated on Aluminum Substrates

by Mustafa Çakır

Coatings 2017, 7(3), 37; https://doi.org/10.3390/coatings7030037 - 02 Mar 2017

Cited by 12 | Viewed by 9019

Abstract

This study describes preparation and characterization of fluorine-containing organic-inorganic hybrid coatings. The organic part consists of bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin and 1,6-hexanediol diacrylate reactive diluent. The inorganically rich part comprises trimethoxysilane-terminated urethane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 3-(trimethoxysilyl) propyl methacrylate and sol–gel precursors that are products of hydrolysis and condensation reactions. Bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin was added to the inorganic part in predetermined amounts. The resultant mixture was utilized in the preparation of free films as well as coatings on aluminum substrates. Thermal and mechanical tests such as DSC, thermo-gravimetric analysis (TGA), and tensile and shore D hardness tests were performed on free films. Water contact angle, gloss, Taber abrasion test, cross-cut and tubular impact tests were conducted on the coated samples. SEM examination and EDS analysis was performed on the fractured surfaces of free films. The hybrid coatings on the aluminum sheets gave rise to properties such as moderately glossed surface; low wear rate and hydrophobicity. Tensile strength of free films increased with up to 10% inorganic content in the hybrid structure and this increase was approximately three times that of the control sample. As expected; the % strain value decreased by 17.3 with the increase in inorganic content and elastic modulus values increased by a factor of approximately 6. Resistance to ketone-based solvents was proven and an increase in hardness was observed as the ratio of the inorganic part increased. Samples which contain 10% sol–gel content were observed to provide optimal properties. Full article

(This article belongs to the Special Issue Advanced Characterization Methods for Organic-Inorganic Hybrid Sol-Gel Coatings)

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