Effect of the particle shape on the particle dynamics in a spheronization process

Effect of the particle shape on the particle dynamics in a spheronization process
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滚圆过程中颗粒形状对颗粒动力学的影响

DOI:
10.1051/epjconf/201714015005
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Sergiy
Sergiy
中科院分区:
--
文献类型:
--
作者:
Dominik;Niesing;Thommes;Markus;Antonyuk;Sergiy

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具有窄尺寸分布的球形颗粒广泛用于许多药物应用中。挤出-滚圆是生产这种药物丸剂的成熟方法。在滚圆机中将来自挤出步骤的圆柱形挤出物滚圆。球化器内部的形成机制强烈地依赖于粒子动力学。为了描述复杂的颗粒流动和相互作用,可以使用离散单元法。在我们以前的工作中,球形粒子在最后一部分的滚圆过程中进行了研究。由于颗粒在开始时具有圆柱形形状,并且在成圆过程中经历不同的变形阶段,因此本研究的目的是描述颗粒形状对颗粒动力学的影响。为了预测颗粒之间的相互作用,用适当的接触模型描述了颗粒的主要塑性行为,并用压缩和冲击试验校准了材料参数。
Spherical granules with a narrow size distribution are widely used in many pharmaceutical applications. Extrusion-spheronization is a well-established process to produce such pharmaceutical pellets. The cylindrical extrudates from the extrusion step are rounded in the spheronizer. The formation mechanisms inside of a spheronizer depend strongly on the particle dynamics. To describe the complex particle flow and interactions, the Discrete Element Method can be used. In our previous works the spherical particles during the last part of the spheronization process were studied. Since the pellets have a cylindrical shape at the beginning and undergo different stages of deformation during the rounding process, the objective of this study was the description of the influence of the particle shape on the particle dynamics. To predict the interactions of the pellets, their dominant plastic behaviour was described with an appropriate contact model and the material parameters were calibrated with compression and impact tests.
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