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以反相微乳液体系制备二氧化硅包覆银纳米粒子核壳微球,从中探讨了不同R值(R=n水/n表面活性剂)所形成的微乳液滴的粒径分布;以及柠檬酸三钠稳定的银离子浓度和正硅酸乙酯(TEOS)浓度对二氧化硅包覆银纳米粒子核壳微球粒径和形貌的影响。结果表明:R越大,微乳液滴粒径越小。当R=10时,0.15m L的0.0123mol/L柠檬酸三钠溶液、0.25m L的0.02467mol/L硝酸银溶液、0.15m L的0.0924mol/L硼氢化钠溶液、0.05m L的正硅酸乙酯和0.1m L氨水所得到的核壳微球形貌和单分散性较好。
The particle size distribution of the microemulsion droplets formed by different R values (R = n water / n surfactant) was discussed by preparing the silica-coated silver nanoparticle core-shell microspheres by reverse microemulsion system. Effect of Stabilized Silver Ion Concentration and TEOS Concentration on Particle Diameter and Morphology of Silica - Coated Silver Nanoparticle Core - Shell Microspheres. The results show that the larger the R is, the smaller the particle size of the microemulsion droplets is. 0.15m L 0.0123mol / L sodium citrate trisodium solution, 0.25m L 0.02467mol / L silver nitrate solution, 0.15m L 0.0924mol / L sodium borohydride solution, 0.05m L positive The morphology and monodispersity of core-shell microspheres obtained from ethyl silicate and 0.1m ammonia water are better.