Bates MA, Frenkel D
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Oct;62(4 Pt B):5225-9. doi: 10.1103/physreve.62.5225.
The phase behavior of model colloidal systems containing platelets and polymer is investigated using computer simulation and perturbation theory. For polymer coils with a diameter sigma(P) larger than 0.3sigma(D), where sigma(D) is the diameter of the platelets, isotropic fluid-fluid coexistence is observed, in addition to the usual isotropic-nematic transition for hard disk systems. For very small polymer coils (sigma(P)<0.1sigma(D)), a nematic-nematic demixing transition is observed, although this occurs at extremely high platelet density. The case of colloidal platelets and thin stiff rods is also examined. Demixing is observed in the isotropic phase for long rods and in the nematic phase for short rods, as for large and small polymer coils, respectively. However, the nematic-nematic demixing transition for platelet-rod mixtures occurs at a much lower platelet density than in the platelet-disk mixtures.
采用计算机模拟和微扰理论研究了含有血小板和聚合物的模型胶体系统的相行为。对于直径σ(P)大于0.3σ(D)的聚合物线圈（其中σ(D)是血小板的直径），除了硬磁盘系统通常的各向同性-向列相转变外，还观察到各向同性流体-流体共存。对于非常小的聚合物线圈（σ(P)<0.1σ(D)），观察到向列相-向列相分离转变，尽管这发生在极高的血小板密度下。还研究了胶体血小板和细刚性棒的情况。对于长棒，在各向同性相中观察到相分离；对于短棒，在向列相中观察到相分离，分别与大、小聚合物线圈的情况相同。然而，血小板-棒混合物的向列相-向列相分离转变发生时的血小板密度比血小板-盘混合物中的低得多。
