Formation and Characterization of Silver Nanoparticle Composite with Poly(<I>p</I>-Br/F-phenylsilane)
作者:Sung-Hee Roh、Ji Eun Noh、Hee-Gweon Woo、Myong-Shik Cho、Honglae Sohn
DOI:10.1166/jnn.2015.9329
日期:2015.2.1
The one-pot production and structural characterization of composites of silver nanoparticles with poly(p-Br/F-phenylsilane), Br/F-PPS, have been performed. The conversion of Ag+ ions to stable Ag0 nanoparticles is mediated by the copolymer Br/F-PPS having both possibly reactive Si—H bonds in the polymer backbone and C—Br bonds in the substituents along with relatively inert C—F bonds. Transmission electron microscopy and field emission scanning electron microscopy analyses show the formation of the composites where silver nanoparticles (less than 30 nm of size) are well dispersed over the Br/F-PPS matrix. X-ray diffraction patterns are consistent with that for face-centered-cubic typed silver. The polymer solubility in toluene implys that the cleavage of C—Br bond and the Si—F dative bonding may not be occurred appreciably at ambient temperature. Nonetheless, thermogravimetric analysis data suggest that some sort of cross-linking could take place at high temperature. Most of the silver particles undergo macroscopic aggregation without Br/F-PPS, which indicates that the polysilane is necessary for stabilizing the silver nanoparticles.
银纳米颗粒与聚(对溴/氟苯基硅烷)、Br/F-PPS复合材料的一锅法生产和结构表征已经完成。 Ag+离子向稳定的AgO纳米粒子的转化是由聚合物主链中可能具有反应性的Si-H键和取代基中的C-Br键以及相对惰性的CF键的共聚物Br/F-PPS介导的。透射电子显微镜和场发射扫描电子显微镜分析显示复合材料的形成,其中银纳米颗粒(尺寸小于 30 nm)很好地分散在 Br/F-PPS 基质上。 X射线衍射图与面心立方型银的X射线衍射图一致。聚合物在甲苯中的溶解度意味着C-Br键和Si-F配位键的断裂在环境温度下可能不会明显发生。尽管如此,热重分析数据表明,在高温下可能会发生某种交联。大多数银颗粒在没有 Br/F-PPS 的情况下会发生宏观聚集,这表明聚硅烷对于稳定银纳米颗粒是必要的。