Abstract
The preservation of cultural heritage monuments and artifacts requires the development of methods to produce water-repellent materials, which can offer protection against the effects of atmospheric water. Fluorosilanes are a very promising class of materials, as they act as precursors for the formation of low surface energy polymer networks. 1H,1H,2H,2H-perfluorooctyl-triethoxysilane is applied on marble, wood and the surfaces of other materials, such as glass, silicon wafer, brass, paper and silk. According to the measurements of static water contact angles, it is reported that superhydrophobicity and enhanced hydrophobicity are achieved on the surfaces of coated marble and wood, respectively. Hydrophobicity and hydrophilicity were observed on the treated surfaces of the other materials. More important, water repellency is achieved on any hydrophobic or superhydrophobic surface, as revealed by the very low sliding angles of water drops. The study is accompanied by colorimetric measurements to evaluate the effects of the treatment on the aesthetic appearances of the investigated materials. Finally, the capillary absorption test and a durability test are applied on treated wood and marble, respectively.
Highlights
Introduction and Michael TurnerThe preservation of the cultural identity may be accomplished by the promotion of the remaining monuments, buildings and artifacts of the cultural heritage
The goal of the present study is to investigate the efficacy of 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FAS) to induce hydrophobicity, and more importantly water repellency, on various cultural heritage materials such as marble, wood, glass, brass, paper and silk
1H,1H,2H,2H-perfluorooctyl-triethoxysilane was applied on marble, wood, glass, silicon wafer, brass, paper and silk samples
Summary
Introduction and Michael TurnerThe preservation of the cultural identity may be accomplished by the promotion of the remaining monuments, buildings and artifacts of the cultural heritage. Modern conceptions of conservation strategies are seen as integrated economic development approaches, similar to parallel processes of improving infrastructure and promoting cultural projects [1]. Conservation products, which have been developed to protect cultural heritage objects and buildings against environmental pollution, human interventions or natural deterioration, should fulfill specific requirements. The small silane and siloxane molecules are polymerized in situ through a sol-gel process, forming a polysiloxane network that improves the mechanical stability and durability of the treated stone [2,3]. The application of carefully designed sol-gel processes can result in the production of superhydrophobic and water-repellent polysiloxane materials [4,5], which apparently offer enhanced protection against the degradation effects of atmospheric water.
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