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Epoxy Sol-Gel Hybrid Thermosets

Department of Analytical and Organic Chemistry, University Rovira i Virgili, C/Marcel lí Domingo s/n, Tarragona 43007, Spain
Thermodynamics Laboratory, ETSEIB University Politècnica de Catalunya, C/Av. Diagonal 647, Barcelona 08028, Spain
Author to whom correspondence should be addressed.
Academic Editor: Naba K. Dutta
Coatings 2016, 6(1), 8;
Received: 30 November 2015 / Revised: 12 January 2016 / Accepted: 19 January 2016 / Published: 3 February 2016
(This article belongs to the Special Issue Multifunctional Organic-Inorganic Hybrid Thin Films and Coatings)
PDF [1456 KB, uploaded 3 February 2016]


Sol-gel methodologies are advantageous in the preparation of hybrid materials in front of the conventional addition of nanoparticles, because of the fine dispersion of the inorganic phase that can be reached in epoxy matrices. In addition, the use of organoalkoxysilanes as coupling agents allows covalent linkage between organic and inorganic phases, which is the key point in the improvement of mechanical properties. The sol-gel process involves hydrolysis and condensation reactions under mild conditions, starting from hydrolysable metal alkoxides, generally alkoxy silanes. Using the sol-gel procedure, the viscosity of the formulation is maintained, which is an important issue in coating applications, whereas the transparency of the polymer matrix is also maintained. However, only the proper combination of the chemistries and functionalities of both organic and inorganic structures leads to thermosets with the desired characteristics. The adequate preparation of hybrid epoxy thermosets enables their improvement in characteristics such as mechanical properties (modulus, hardness, scratch resistance), thermal and flame resistance, corrosion and antimicrobial protection, and even optical performance among others. View Full-Text
Keywords: sol-gel; hybrid; nanocomposites; epoxy resins; coatings sol-gel; hybrid; nanocomposites; epoxy resins; coatings

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Serra, A.; Ramis, X.; Fernández-Francos, X. Epoxy Sol-Gel Hybrid Thermosets. Coatings 2016, 6, 8.

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