论文部分内容阅读
采用聚苯乙烯磺酸钠(PSS)和聚二烯丙基二甲基氯化铵(PDDA)两种聚电解质,通过静电层层自组装成功地将MCM-41介孔二氧化硅纳米粒子包覆到聚苯乙烯(PS)微球表面.实验结果表明,当以尺寸为1.4μm的PS微球为核时,包覆了两个聚电解质双层(PDDA/PSS)2的PS(PDDA/PSS)2(PDDA/MCM-41)复合结构微粒与包覆了一个聚电解质双层(PDDA/PSS)的PS(PDDA/PSS)(PDDA/MCM-41)复合结构微粒相比,复合结构微粒之间的交联程度降低,但是MCM-41纳米粒子在聚苯乙烯微球表面的包覆都比较松散,且产物中存在大量杂质.而当以尺寸为5μm的聚苯乙烯微球为核时,MCM-41纳米粒子紧密地包覆在聚苯乙烯微球表面,复合结构微粒之间只有少量桥连物,且产物中杂质很少.
Two types of polyelectrolytes, sodium polystyrenesulfonate (PSS) and polydiallyldimethylammonium chloride (PDDA), were successfully used to self-assemble MCM-41 mesoporous silica nanoparticles Coated on the surface of polystyrene (PS) microspheres.Experimental results show that PS (PDDA / PSS) 2 coated with two polyelectrolyte bilayers (PDDA / PSS) (PDDA / PSS) 2 (PDDA / MCM-41) composite structure particles compared with PDDA / PSS (PDDA / PSS) composite structure particles coated with one polyelectrolyte double layer (PDDA / PSS) , But the degree of cross-linking between MCM-41 nanoparticles is loose on the surface of polystyrene microspheres, and there are a lot of impurities in the product.When polystyrene microspheres with a size of 5μm are used as the core , MCM-41 nanoparticles tightly coated on the surface of polystyrene microspheres, the composite structure between the particles only a small amount of bridging, and product impurities.