Hydrophobic metal-organic framework material based on fluorosilane-modified UIO-66-OH: Preparation and application in the conservation of limestone cultural relics

The development of hydrophobic materials has always been a difficult issue in the protection of stone cultural relics. In this work, a new hydrophobic metal-organic framework material was synthesized by modifying the Zr-based MOFs containing 2-hydroxyterephthalic acid linkers with fluorosilane to obtain UIO-O-FS material, and characterization tests such as FTIR, X-ray diffraction, N-2 adsorption-desorption, thermogravimetry, scanning electron microscope, and transmission electron microscope, as well as erosion resistance tests, were carried out on the material. Based on the results, the material possesses good hydrophobicity, consolidation ability, acid resistance, and salt resistance, and is a new type of stone heritage conservation material.