Simulating multifaceted interactions between kaolinite platelets

Simulating multifaceted interactions between kaolinite platelets
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模拟高岭石片晶之间的多方面相互作用

DOI:
10.1016/j.powtec.2022.118062
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发表时间:
2023
期刊:
影响因子:
5.2
通讯作者:
De Bono J
De Bono J
中科院分区:
工程技术2区
文献类型:
--
作者:
De Bono J

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众所周知,高岭石薄片容易聚集成具有面对面接触的“堆叠”。高岭土的传统观点是,在酸性环境中,片晶面带负电荷,边缘带正电荷,但在接近的某个近距离范围内,面之间可能存在某种吸引力。本文中的粒子尺度模拟表明,这是不足以解释在沉积过程中的聚集。最近,它已被确定,高岭石血小板的二氧化硅和氧化铝面在酸性条件下具有相反的电荷,并考虑到这些发现,离散元模拟,复制和解释的面对面的聚集,发生在沉降过程中。结果表明,在任何基于颗粒的模型中,正确建模个体血小板的各种表面之间的相互作用的重要性。
It is well known that kaolinite platelets readily aggregate into ‘stacks’, having face-to-face contact. The traditional view of kaolin has been that the platelet faces are negatively charged and the edges are positively charged in an acidic environment, but that some attraction between faces may exist at some close range of approach. Particle-scale simulations in this paper show that this is insufficient to explain aggregation during sedimentation. Recently it has been established that the silica and alumina faces of kaolinite platelets have opposite charges in acidic conditions, and taking these findings into account, discrete element simulations are presented which replicate and explain the face-to-face aggregation that occurs during sedimentation. The results demonstrate the importance of correctly modelling the interactions between the various surfaces of individual platelets in any particle-based model.
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DOI: --
发表时间: 2016
期刊:
影响因子: --
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DOI: 10.1016/j.jmps.2022.104847
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发表时间: 2018
影响因子: 5.3
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