Cultural heritage protection via hybrid nanocomposite coating

Abstract

Historical constructions are exposed to weathering conditions and atmospheric pollution for many years which demolish the historical material as well as dramatically influence their visual aspects. Nowadays, the development of conservative coatings with weather-resistant, self-cleaning, and hydrophobic properties is a promising challenge for carbonate stones. In this study, a simple synthesis route is developed to obtain organic-inorganic hybrid nanocomposites. The main components of the acrylate coatings are methyl methacrylate, 3-(trimethoxysilyl)propyl methacrylate (TMSM). Tetraethyl orthosilicate (TEOS) is added to the coating to improve the thermal resistance of the coating. Perfluorooctyl-trichlorosilane (FOTCS) is added to the coating to improve the weathering resistance and hydrophobic behaviour of the coating. Also, titanium dioxide (TiO 2 ) is added to improve the thermal resistance and photocatalytic feature of the coating. The results confirmed significant enhancement in contact angle and weathering resistance that originates from adding an organofluorine component in the structure of the coating. A hybrid coating includes acrylate monomers as the binder and chemical substances include an organosilane (TEOS), fluorinated silane (FOTCS) and titania nanoparticles (TiO 2 ) has appropriate properties like thermal resistance, mechanical resistance, weathering resistance, hydrophobicity, and selfcleaning that can be used as a protective coating for the precious stone-made cultural heritages.

Sustainable Secondary-Raw Materials, Natural Substances and Eco-Friendly Nanomaterial-Based Approaches for Improved Surface Performances: An Overview of What They Are and How They Work

“…The hydrophobicity of the coating is improved thanks to the achievement of a rough surface obtained by the employment of the organofluorine–titania hybrid nanocomposite. Additionally, titanium dioxide enhances thermal resistance and hardness and trigger photocatalytic activity, which results in the surface’s ability to self-clean [ 63 ].…”

Perspective Chapter: Functional Sol-Gel Based Coatings for Innovative and Sustainable Applications

“…In this regard, the functional coating featuring self-cleaning, porous and superhydrophobic properties was obtained with a one-step spraying method starting from a formulation based on isobutyltriethoxysilane and nano-SiO 2 prepared at room temperature [91]. A multifunctional protective formulation was developed by Azadi et al containing methyl methacrylate, 3-(trimethoxysilyl)propyl methacrylate, perfluorooctyltrichlorosilane and TiO 2 to improve the weathering resistance, self-cleaning properties and hydrophobic behavior of the coated stones with the final nanohybrid film [92].…”

Stimuli‐Responsive Electrochemical Energy Storage Devices

“…The specific functional groups in the structure of materials or on the surface/interface of materials can react to different stimuli due to obtained stimuli‐responsive materials [11] . Functional groups have been providing specific feature on the surface of the materials [12,13] . This is the simplest method to prepare stimuli‐responsive materials: modification of the surface via active functional groups.…”

“…[11] Functional groups have been providing specific feature on the surface of the materials. [12,13] This is the simplest method to prepare stimuli-responsive materials: modification of the surface via active functional groups. The active functional groups in the surface/interface due to the material responsiveness in the presence of stimulates.…”