Hydrophobic composite material for stone cultural relic protection and preparation method thereof

The invention relates to a hydrophobic composite material for stone cultural relic protection and a preparation method thereof.The preparation method comprises the steps that firstly, a mixed solution of absolute ethyl alcohol and deionized water is prepared, the pH is adjusted to range from 4 to 5, a fluorosilane coupling agent is added into the mixed solution, full stirring reaction is conducted, a solution B is obtained, UIO-66-(OH) n powder is placed in a three-neck flask, the solution B is dropwise added into the three-neck flask at a low speed, stirring reaction is conducted at a low speed, and the hydrophobic composite material for stone cultural relic protection is obtained; performing ultrasonic treatment and electric stirring on the mixed system, then drying, curing and grinding the mixed system to obtain UIO-O-FS powder, adding the powder into a dispersing agent solution, and performing ultrasonic treatment to obtain UIO-O-FS sol, namely the hydrophobic composite material for stone cultural relic p