Duda Y
Instituto de Química de la UNAM, Coyoacán, D. F., 04510, Mexico
J Colloid Interface Sci. 1998 Dec 1;208(1):279-286. doi: 10.1006/jcis.1998.5834.
The effective interaction between colloids in a solvent of hard spheres, which can polymerize with the formation of cross-like molecular clusters, is studied on the basis of the solution of the associative Percus-Yevick/Ornstein-Zernike equation for spatial correlations in an infinitely dilute solution. It is found that at low solvent density and low temperature, the effective intermolecular potential between the colloidal particles is attractive, thus facilitating a phase separation or precipitation of the colloids. A depletion of the local solvent density around the colloidal particle is observed. If the solvent consists of extended associative complexes, compared with hard spheres, the correlation between the colloid particles are of longer range and barrier for flocculation shifts to the larger separations. The effect of size ratio of the colloid spheres and of solvent on the potential of mean force is also discussed. Copyright 1998 Academic Press.
在硬球溶剂中，研究了可聚合形成十字形分子簇的胶体之间的有效相互作用，该研究基于对无限稀溶液中空间相关性的缔合珀西 - 耶维克/奥恩斯坦 - 泽尼克方程的求解。研究发现，在低溶剂密度和低温下，胶体颗粒之间的有效分子间势是吸引性的，从而促进了胶体的相分离或沉淀。观察到胶体颗粒周围局部溶剂密度的耗尽。如果溶剂由伸展的缔合络合物组成，与硬球相比，胶体颗粒之间的相关性范围更长，絮凝障碍转移到更大的间距。还讨论了胶体球尺寸比和溶剂对平均力势的影响。版权所有1998年学术出版社。
