| F127反相微乳液的组成对AgCl纳米粒子形成及AgCl/F127-PMMA杂化膜结构和性能的影响 |
| Formation of AgCl Nanoparticles in F127 Microemulsion and the Relationship of Structure-Performance of AgCl/F127-PMMA Hybrid Membranes |
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| 摘要: 以F127为表面活性剂构成的反相微乳液制备AgCl纳米粒子和AgCl/F127-PMMA杂化膜，通过紫外可见光谱(UV-visible)、透射电镜(TEM)研究了微乳液的增容水量(ω)和盐浓度(Csalt)对AgCl粒子形成与形貌的影响；结合表面ζ电位测定、扫描电镜(SEM)分析和溶胀实验等考察了AgCl/F127-PMMA杂化膜的结构和性能。研究结果表明，低ω下盐浓度增加，胶束中AgCl反应速率增大，导致大量小粒径AgCl粒子的形成；高ω下盐浓度增加，将加快AgCl粒子的生长，从而导致胶束中的AgCl粒子粒径增大；各种ω下盐浓度的增加，都会引起胶束中单质Ag的形成。杂化膜的SEM分析显示，AgCl粒子粒径越小，在杂化膜中的分散性越好，膜表面的ζ电位也越高，膜在苯中的溶胀性能也越高；单质Ag的出现和AgCl粒子数目的增多，杂化膜中将显现明显的粒子团聚现象，这极大地影响了杂化膜在苯中的溶胀性能；而杂化膜在环己烷中的溶胀性能较低，且随ω和盐浓度的变化极小。 |
| 关键词: F127 微乳液 AgCl纳米粒子 杂化膜 |
| 基金项目: |
| Abstract: The formation and morphology of AgCl nanoparticles in F127 microemulsion were first explored with ultraviolet-visible spectrum and transmission electron microscopy (TEM). Then, the swelling adsorption measurement, ζ potential and SEM were employed to evaluate the influence of molar ratio of water to surfactant (ω) and salts concentration (Csalt) on structure and performance of AgCl/F127-PMMA hybrid membranes. The results of ultraviolet-visible spectrum and TEM shown that the increase of Csalt would promoted the formation of many AgCl nanoparticles with small size in the microemulsion at low ω. Under high ω, the growth rate of AgCl nanoparticles increased, and the mean size of AgCl nanoparticle increased with Csalt rising. Furthermore, Ag nanoparticles appeared in the microemulsion while Csalt was high. The structure and performance of the membranes analysis indicated that AgCl nanoparticles maintained well dispersion in the hybrid membranes, the membranes surface had high ζ potential, and the swelling performance of the membranes in benzene was high while the size of AgCl nanoparticles was small. The generation of Ag particles and the increase of the number of AgCl nanoparticle would led to the aggregate of particle in the hybrid membranes, which depressed greatly the swelling performance of the membranes in benzene. The swelling performance of the hybrid membranes in cyclohexane was low at different ω and Csalt. |
| Keywords: F127 microemulsion AgCl nanoparticle hybrid membranes |
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| 王 健,王 挺,吴礼光.F127反相微乳液的组成对AgCl纳米粒子形成及AgCl/F127-PMMA杂化膜结构和性能的影响[J].无机化学学报,2012,28(5):989-994. |
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