High-low-temperature-resistant high-delay-elastic ultrathin overlay material and preparation method thereof

The preparation method comprises the following steps: pretreating molybdenum disulfide by adopting an amino silane coupling agent, introducing an amino group to the surface of the molybdenum disulfide, and grafting polyethyleneimine to the surface of the molybdenum disulfide through a chemical reaction between the amino group and an aldehyde group, so as to obtain the high-temperature-resistant and low-temperature-resistant ultra-thin overlay material with high elasticity. Modified molybdenum disulfide is obtained; molybdenum disulfide has high and low temperature stability, through modification treatment on molybdenum disulfide, the dispersity and compatibility of molybdenum disulfide in an asphalt organic phase are improved, and then the high and low temperature stability of the overlay material is improved; the modified molybdenum disulfide can construct a stable interpenetrating network system in an asphalt system, polyethyleneimine contains an alkyl long-chain structure and can enhance the toughness of t