Magnetic microcapsule, preparation method thereof, and magnetic film

A magnetic microcapsule, wherein the magnetic microcapsule comprises a wall material and a core material, the wall material is a mixture of an anionic polymer and a cationic polymer, the core material is a mixture of magnetic particles, non-magnetic particles, an oily solvent and a suspension stabilizer, the magnetic particle includes nano-ferric oxide, and also include one or two of oleophilic nano-ferrites and nano-neodymium iron boron, the magnetic strength of nano-ferric oxide, nano-ferrites, and nano-neodymium iron boron are different;

• the non-magnetic particles are oleophilic nano-titanium dioxide, the cationic polymer and anionic polymer in the wall material are respectively ε-polylysine and gum arabic, the core material comprises nano-magnetite, the nano-sized ferrite, and the nano-titanium dioxide, the oily solvent includes white oil and paraffin, the suspension stabilizer includes one or more of phthalate esters, polyamide wax, polysiloxane, sorbitan oleate, sorbitan monostearate, silicon dioxide, magnesium aluminum silicate, and magnesium lithium silicate.