Aggregation of growing crystals in suspension: III. Accounting for adhesion and repulsion
Aggregation of growing crystals in suspension: III. Accounting for adhesion and repulsion
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悬浮液中生长晶体的聚集：III．
DOI：
10.1016/j.ces.2014.12.055
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发表时间：
2015
影响因子：
4.7
通讯作者：
Pitt K
中科院分区：
文献类型：
--
作者：
Pitt K
在这篇文章中，我们修正了我们以前发表的描述悬浮液中晶体聚集行为的模型。该模型仅从胶结的角度来考虑凝聚，即碰撞粒子之间的颈部生长。在当前的工作中，我们在我们的模型中引入了在粒子间作用力存在的情况下生长晶体的聚集。这里我们假定，碰撞的粒子之间的粘合可以增强聚集，或者粒子的排斥可以减小聚集。在新的模型中，我们通过沿线性接触作用的表面能来表征粘附力或排斥力，并随后定义了粘附力Mumtaz数，MA。在同时胶结和粘结的情况下，Mumtaz数简单地等于单独的胶结和粘结数之和。在本工作中，研究了两种一水草酸钙(COM)和一种方解石在低离子强度和高离子强度条件下的晶型。方解石晶体被发现证明了碰撞粒子之间的粘合，无论是高离子强度还是低离子强度。此外，离子强度也影响固井参数。不同形式的胶凝材料表现出不同的胶凝和颗粒间行为。这些效应归因于纳米尺度上体系之间的差异，聚集行为取决于生长晶体的各向异性。
In this paper we modify our previously published model describing the aggregation behaviour of crystals growing in suspensions. That model considered aggregation only in terms of cementing, i.e. the growth of a neck between colliding particles.In this current work, we introduce into our model the case of aggregation of growing crystals in the presence of inter-particle forces. Here we postulate that aggregation may be augmented by adhesion between the colliding particles, or diminished by repulsion of particles. In the new model we characterise the adhesive or repulsive force by a surface energy acting along a linear contact and subsequently define anadhesionMumtaz number,MA. In the case of simultaneous cementing and adhesion the Mumtaz number is simply the sum of the separate cementing and adhesion numbers.In this work, two crystallographic forms of calcium oxalate monohydrate (COM) and one form of calcite under both low and high ionic strength conditions were studied. Calcite crystals were found to evidence adhesion between the colliding particles, both a high and low ionic strength. Furthermore, the ionic strength also influenced the cementing parameter. The different forms of COM exhibited both different cementing and inter-particle behaviour. These effects were attributed to differences between the systems at the nano-scale and that aggregation behaviour depends on the anisotropic nature of growing crystals.
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悬浮液中生长晶体的聚集：I. Mumtaz 重温
影响因子：
4.7
作者：
Hounslow M
通讯作者：
Hounslow M
DOI：
--
发表时间：
1984
期刊：
影响因子：
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作者：
M. Ishikawa;M. Ichikuni
通讯作者：
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影响因子：
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作者：
R. Eriksson;J. Merta;J. Rosenholm
通讯作者：
J. Rosenholm
影响因子：
4.7
作者：
Pitt K
通讯作者：
Pitt K
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
G. Tarı̀;J. Ferreira
通讯作者：
J. Ferreira