In the paper , we use coupler kh570 to modify nanoparticles , bond coupler onto nanoparticles , and obtain alkylated nanoparticles ; then with the help of coupler on the surface of alkylated nanoparticles , we graft pmma onto nanoparticles through in - situ polymerization of mma monomer , and gain composited nanoparticles encapsulated by polymer , thereby nanoparticles are encapsulation modified 本论文采用偶联剂kh570对纳米粒子进行改性,使之键接于纳米粒子表面后,获得烷基化纳米粒子;然后在烷基化纳米粒子表面通过单体mma的原位聚合,接枝聚合物pmma ,实现聚合物包覆纳米粒子获得复合纳米粒子,以达到纳米粒子的聚合物包覆改性。