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Tailoring morphology and bulk density of magnesium ethoxide particles by adding n-hexane and silicone oil
Particuology ( IF 4.1 ) Pub Date : 2020-04-16 , DOI: 10.1016/j.partic.2020.02.002
Zhou Lan , Yangcheng Lu

In this work, we used the inert substances silicone oil and n-hexane to modulate the solvent environment, and in so doing tailor the preparation of magnesium ethoxide (Mg(OEt)2) particles. We found the following: (1) nonpolar n-hexane mainly modulates the polarity of the solvent to control the precipitation rate and size of the Mg(OEt)2 seeds, thereby triggering accelerated nucleation to form small primary particles; and (2) silicone oil (relatively high polarity and viscosity) facilitates the growth and agglomeration stage, to improve inter-particle dispersion and obtain relatively uniform Mg(OEt)2 particles. We summarized these findings in a common mechanism for preparing Mg(OEt)2 particles with uniform morphology, small size, and high bulk density as per the synergistic effect of n-hexane and silicone oil. The ratios of silicone oil and n-hexane are flexible, and afford various regular and well-dispersed Mg(OEt)2 particles that are 5–30 μm in size and 0.2–0.7 g/cm3 in bulk density. The nanoparticles thus have the potential to serve in diverse applications such as catalysis.



中文翻译:

通过添加乙醇镁粒子的剪裁的形态和堆积密度Ñ正己烷和硅油

在这项工作中,我们所用的惰性物质硅油和Ñ己烷以调制溶剂的环境中,并在这样做裁缝乙醇镁(Mg(上OET)的制备2)的颗粒。我们发现如下:(1)非极性Ñ己烷主要调制来控制的Mg(OET)的沉淀速率和大小的溶剂的极性2个种子,从而触发加速成核以形成小的一次颗粒; (2)硅油(相对较高的极性和粘度)促进了生长和附聚阶段,改善了颗粒间的分散并获得了相对均匀的Mg(OEt)2颗粒。我们在制备Mg(OEt)2的通用机制中总结了这些发现。颗粒具有均匀的形态,小尺寸和高的堆积密度为每协同效应Ñ正己烷和硅油。硅油和比率Ñ正己烷是柔性的,并且得到各种规则和良好分散的Mg(OET)2个颗粒,其5-30微米的尺寸和0.2-0.7克/厘米3的堆积密度。因此,纳米颗粒具有在多种应用例如催化中发挥作用的潜力。

更新日期:2020-04-16
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