| T型混合反应器内共沉淀法制备吡啶硫酮铜 |
| Synthesis of Copper Pyrithione by Co-Precipitation Method in Tee Mixer Reactor |
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| 摘要: 在T型混合反应器内通过喷射共沉淀方法合成了吡啶硫酮铜(CPT)。利用扫描电镜和小角度光散射实验手段研究了分散液中吡啶硫酮铜的形貌和大小。通过喷射共沉淀方法获得的初级吡啶硫酮铜颗粒为棒状,在分散液中这些棒状颗粒易发生团聚,形成分形维数为2.1的团聚体。用平均回转半径(<Rg>)表征分散液中团聚体的平均大小,考察了反应温度和反应物化学计量比(吡啶硫酮钠/硫酸铜)对团聚体大小的影响,随着反应温度的降低,团聚体的回转半径逐渐减小;过量的吡啶硫酮钠也有利于降低团聚体的大小,当吡啶硫酮钠过量量达到~25%时,进一步增大吡啶硫酮钠的过量量,团聚体的回转半径不再发生明显变化。 |
| 关键词: 吡啶硫酮铜 T型喷射反应器 共沉淀 棒状 小角度光散射 分形结构 |
| 基金项目: 国家自然科学基金(No.21006011)和江苏省自然科学基金(No.BK2010410)资助项目。 |
| Abstract: This work aims to develop a jet co-precipitation process in a tee mixer reactor to synthesize copper pyrithione (CPT). The morphology and size of CPT in dispersion were investigated by using SEM and small angle light scattering (SALS). The rod-like primary particles were obtained via the jet co-precipitation process. These primary particles tend to form aggregates with a fractal dimension of 2.1 in aqueous solutions. The effect of the reaction temperature and stoichiometry ratio of sodium pyrithione (SPT)/CuSO4 on the size of particles aggregates was studied. Decreasing the reaction temperature can reduce the size of the aggregates in terms of average radius of gyration, <Rg>. The excess of SPT is also beneficial to reducing <Rg>. When SPT excess reaches a certain value, e.g. ~25%, <Rg> decreases slightly with a further SPT excess. |
| Keywords: copper pyrithione tee mixer reactor co-precipitation rod-like small angle light scattering fractal structure |
| 投稿时间：2013-03-07 修订日期：2013-05-05 |
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| 骆培成,施磊,项国兆,赵素青,焦真.T型混合反应器内共沉淀法制备吡啶硫酮铜[J].无机化学学报,2013,29(8):1738-1744. |
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