Abstract: Mono-dispersed polymethyl methacrylate (PMMA) latex microspheres were prepared by emulsion polymerization using ammonium persulfate as initiator,sodium dodecyl sulfate as emulsifier and methyl methacrylate as monomer.The results show that the particle size of the as-synthesized PMMA microspheres can be effectively controlled and adjusted by changing the content of emulsifier.The PMMA microspheres with diameter distribution of 200~300 nm were obtained.The self-assembly of PMMA microspheres was accelerated by demulsification sedimentation method so as to obtain a tightly packed PMMA microsphere colloidal template.The solution of aluminum isopropoxide dissolved in ethanol (acidified by hydrochloric acid) was filled into the interspaces of the PMMA colloidal template.The macroporous material of alumina was then obtained by roasting the template.γ-Al₂O₃ three-dimensionally ordered macroporous material (3DOM) was obtained by calcination at 950 ℃ for 3 h.The results of SEM and TEM show that the material is 3DOM which has many porous channels.

Key words: polymethyl methacrylate microsphere, mono-dispersed, colloidal template, three-dimensionally ordered macroporous material