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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()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。
Copper pyrithione (CPT) was synthesized by spray co-precipitation in a T-type mixed reactor. The morphology and size of copper pyrithione in the dispersion were investigated by scanning electron microscopy and small-angle light scattering. The primary copper pyrithione particles obtained by the spray co-precipitation method are rod-like and the rod-like particles tend to agglomerate in the dispersion to form agglomerates with a fractal dimension of 2.1. The average size of the agglomerates in the dispersion was characterized by the average radius of gyration (Rg). The effects of reaction temperature and reactant stoichiometry (sodium pyrithione / copper sulphate) on the size of the agglomerates were investigated. As the reaction temperature Decreased, the radius of gyration of agglomerates gradually decreased; excess sodium pyrithione also reduced the size of agglomerates. When the excess amount of sodium pyrithione reached ~ 25%, the excess amount of sodium pyrithione was further increased, Aggregate radius of gyration no longer significant changes.