Mechanisms of phase separation and aggregation in colloid-polymer mixtures.
Mechanisms of phase separation and aggregation in colloid-polymer mixtures.
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DOI：
10.1103/physreve.65.011403
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发表时间：
2001-12
期刊：
影响因子：
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通讯作者：
V. J. Anderson;E. D. de Hoog;H. Lekkerkerker
中科院分区：
文献类型：
--
作者：
V. J. Anderson;E. D. de Hoog;H. Lekkerkerker
胶体体系的最终结构很大程度上受到相分离和聚集发生的机制的影响。通过改变聚合物浓度，可以改变胶体-聚合物混合物中相分离的驱动（由于耗尽相互作用而相分离）。在这里，我们使用小角度光散射来跟踪这种混合物中的相分离，并在先前显微镜研究结果所指示的框架内分析结果。发现扩散限制簇聚集、反应限制簇聚集、成核和生长的机制可以很好地描述相分离机制。在成核和生长状态下的生长速率取决于聚合物的浓度。
The final structure of a colloidal system is greatly influenced by the mechanisms by which phase separation and aggregation occur. The drive to phase separate can be altered in colloid-polymer mixtures (which phase separate due to the depletion interaction) by varying the polymer concentration. Here, we use small angle light scattering to follow the phase separation in such mixtures and analyze the results within a framework indicated by previous results from microscopy investigations. The mechanisms of diffusion-limited cluster aggregation, reaction-limited cluster aggregation, and nucleation and growth are found to provide good descriptions of the phase separation regimes. The growth rate in the nucleation and growth regime is shown to be dependent on the polymer concentration.