▎ 摘　　要

NOVELTY - Nano-material modified by polyion liquid comprises nanoparticles and polyionic liquid grafted on the nanoparticles by a coupling agent. The polyionic liquid is obtained by polymerizing an acidic vinyl ionic liquid. The acidic vinyl ionic liquid includes 1-vinyl-3-(sulfonic acid butyl) hydrogen sulfate, 1-vinyl-3-(sulfonic acid butyl) dihydrogen phosphate or 1-vinyl-3-(sulfobutyl)p-toluenesulfonate. USE - Nano-material modified by polyion liquid used as a catalyst in catalyzing polyhydric alcohols and fatty acids in the preparation of polyol ester by esterification reaction (claimed). ADVANTAGE - The nano-material modified by polyion liquid exerts excellent performance of the polyionic liquid functionalized nano-particle composite material, inhibits the aggregation of the active centre, solves the problem that the polyion liquid viscosity is large, realizes synergistic catalytic effect, and reduces the dosage of the catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is includes for a method for preparing nano-material modified by the polyionic liquid, which involves: a. coupling the nanoparticles with a bromosilane coupling agent to obtain pretreated nanoparticles; and b. mixing pretreatment nano particles, acidic vinyl ionic liquid, cuprous halide catalyst, N,N-dimethylformamide and organic ligands for atom transfer radical polymerization to obtain a product.