Effect of feeding condition on crystal size distributions of mono-dispersed SrSO4 particles produced via PEI-Assisted double-jet reactive crystallization
Effect of feeding condition on crystal size distributions of mono-dispersed SrSO4 particles produced via PEI-Assisted double-jet reactive crystallization
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DOI：
10.1252/jcej.09we113
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发表时间：
2010-03
影响因子：
0.8
通讯作者：
T. Mikami;T. Sakuma;I. Hirasawa
中科院分区：
文献类型：
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作者：
T. Mikami;T. Sakuma;I. Hirasawa
采用双射流半间歇反应结晶器制备了单分散/窄分布的微米级SrSO4颗粒。在短时间内缓慢的摩尔加料维持了适当的过饱和水平，并且由于防止了小的初生析出物的团聚生长而导致分布狭窄。此外，聚乙烯亚胺（PEI）是硫酸盐沉淀（如SrSO4和PbSO4）的合适生长/团聚抑制剂，可以有效地降低颗粒尺寸，从而获得单微米产品。除了加料条件外，本文还研究了PEI用量对晶体尺寸分布（CSDs）的影响。使用聚电解质添加剂（如PEI）的受控双射流进料将是获得无团聚均匀微粉末作为最终固体产品的有力方法。
Micron-sized SrSO4 particles having mono-dispersed/narrow distributions have been produced with a double-jet semi-batch reactive crystallizer. Slow molar feedings over a short time maintained proper supersaturation levels and result in narrow distributions due to the prevention of agglomeration growth of small primary precipitates. Furthermore, polyethylenimine (PEI) is a suitable growth/agglomeration inhibitor for sulfate precipitation, e.g., SrSO4 and PbSO4, and effectively reduced particle sizes leading to single-micron products. Besides feeding conditions, in the present work, the influence of PEI dosage on crystal size distributions (CSDs) is investigated. The controlled double-jet feeding using a polyelectrolyte additive such as PEI will be a powerful methodology to obtain agglomeration-free uniform micro-powders as a final solid product.