三维有序大孔聚苯乙烯的制备及表征

采用播种生长法制备了粒径为330 nm的单分散胶体二氧化硅（SiO2），并对单分散的SiO2颗粒表面进行改性，以提高颗粒对苯乙烯单体的亲和力.然后通过垂直沉积法组装出SiO2胶粒晶体模板.依靠毛细管力将苯乙烯前驱物快速填充进模板颗粒的间隙，加热原位聚合 ，用氢氟酸去除模板后制得三维有序大孔聚苯乙烯.扫描电子显微镜结果显示，所合成的孔材料高度有序，孔腔尺寸约为210 nm，孔腔之间由较小孔窗连接，形成非常开放的通道网络 .关键词：三维有序大孔材料(3DOM)聚苯乙烯模板二氧化硅

Synthesis and characterization of three-dimensionally ordered macroporous polystyrene

Three-dimensionally ordered macroporous polystyrene was successfully synthesized through using silica sphere colloid crystals as template and in-situ polymeriza tion of styrene inside the template. The silica spheres with a diameter of 330 n m and 2.75% relative standard deviation were prepared by seeding method. For th e purpose of improving the wetting ability between the silica particles and styr ene, the hydrophilic surface of silica particles was switched to hydrophobic by 3-Aminopropyl-triethoxysilan (APS). Three-dimensionally ordered colloidal crystal was prepared by assembling the modified particles through a vertical depositio n technique at 30℃ for 48h. Styrene monomer was filled into the void of the tem plate and the polymerization of the styrene was carried out at 60℃ for 6h, being used (put the initiator in here) as initiator. The three-dimensionally ordered macroporous polystyrene was thus obtained by removing the silica template from polystyrene materials with 04% HF. The macroporous polystyrene shows a beautif ul iridescence in reflected light, which resulted from Bragg diffraction. SEM im ages indicated that the pores with a diameter of about 210nm were arrayed period ically and connected with each other.