The invention relates to the technical field of magnetorheological materials, in particular to a preparation method high-performance magnetorheological nano
composite polymer gel, and solves the problems that existing gel is poor in
dispersity and stability, and the mechanical performance and magnetorheological performance of the gel cannot be increased at the same time. According to the technical scheme, the preparation method includes: dissolving FeCl2-4H2O, FeCl3-6H2O and surfactant into water; adding NaOH, performing
magnetic separation ultrasonic dispersing, and dispersing into deionized water; adding
hectorite into the deionized water, and adding
polymer monomer; adding initiator and catalyst, and adding dispersing liquid; vacuumizing, and performing reaction in a sealed manner. The preparation method has the advantages that nano magnetic particles do not settle, the interaction force between the magnetic particles and a gel
polymer matrix is increased, and stability and
dispersity are increased; a three-dimensional cross-linked
network structure is formed, and large filling quantity and good
controllability are achieved; the high-performance magnetorheological nano
composite polymer gel is good in mechanism performance and magnetorheological performance and high in tensile strength, elongation at break, magnetorheological effect and relative magnetorheological effect.