▎ 摘　　要

NOVELTY - Method for preparing submicron nylon 6/graphene functional microspheres involves (i) dissolving functionalized graphene in a molten caprolactam monomer and preparing a caprolactam/functionalized graphene suspension with a functionalized graphene concentration of 0.01-2 wt.%, (ii) adding a polymer to the caprolactam/functionalized graphene suspension, removing water under vacuum at 120-150 degrees C for 1-2 hours, adding an initiator and an activator, reacting at 160-180 degrees C to initiate a caprolactam monomer anion ring-opening polymerization and reversing to obtain a polyamide 6 alloy, where the polymer is polystyrene, polyethylene glycol and polyether polyol, the addition amount of the initiator is 0.2-0.5% based on the total mass of the caprolactam monomer and the polymer and the addition amount of the activator is 0.2-0.6% based on the total mass of the caprolactam monomer and the polymer and (iii) crushing the polyamide 6 alloy, immersing in deionized water or toluene for etching. USE - The method is useful for preparing submicron nylon 6/graphene functional microspheres. ADVANTAGE - The method does not require special equipment, consumes short time, adopts simple operation and provides the microspheres with controllable microsphere size and excellent sphericity and thermal stability. DETAILED DESCRIPTION - Method for preparing submicron nylon 6/graphene functional microspheres involves (i) dissolving functionalized graphene in a molten caprolactam monomer and preparing a caprolactam/functionalized graphene suspension with a functionalized graphene concentration of 0.01-2 wt.%, (ii) adding a polymer to the caprolactam/functionalized graphene suspension, removing water under vacuum at 120-150 degrees C for 1-2 hours, adding an initiator and an activator, reacting at 160-180 degrees C for 30 minutes to initiate a caprolactam monomer anion ring-opening polymerization and reversing to obtain a polyamide 6 alloy, where the polymer is polystyrene, polyethylene glycol and polyether polyol, the addition amount of the polymer is based on the mass of the caprolactam monomer, the mass ratio of the polymer to the caprolactam monomer is (1-9):1, the addition amount of the initiator is 0.2-0.5% based on the total mass of the caprolactam monomer and the polymer and the addition amount of the activator is 0.2-0.6% based on the total mass of the caprolactam monomer and the polymer and (iii) crushing the polyamide 6 alloy, immersing in deionized water or toluene for etching.