Asphalt crack self-repairing microcapsules and preparation method thereof

The invention belongs to the field of road repairing and particularly relates to asphalt crack self-repairing microcapsules and a preparation method thereof. The asphalt crack self-repairing microcapsule comprises the following components in parts by mass: 30-50 parts of methylated melamine-formaldehyde resin prepolymer, 20-50 parts of asphalt regenerating agent, 2-5 parts of styrene-maleic anhydride copolymer, 0.5-2 parts of graphene and 80-120 parts of distilled water. By adding graphene, the material defects in the original wall material forming process can be compensated and the stability, mechanical strength and electrical and thermal conductivity of the microcapsules are improved as well. Initial decomposition temperature of the microcapsules can exceed 350 DEG C, the rupture strength of a single microcapsule can reach 3.5MPa, the thermal conductivity coefficient of the microcapsule is 1,000w/mk, and the electric conductivity can reach 10,000s/cm. 本发明属于道路修复领域，具体涉及种沥青裂缝自修复微胶囊及其制备方法。所述的种沥青裂缝自修复微胶囊，包括下述质量份