| 二元胶体的熵驱动相变 |
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| 引用本文： | 李延龙,陈玉红,冯旺军. 二元胶体的熵驱动相变[J]. 兰州理工大学学报, 2004, 30(2): 133-135 |
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| 作者姓名： | 李延龙 陈玉红 冯旺军 |
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| 作者单位： | 兰州理工大学,理学院,甘肃,兰州,730050;兰州理工大学,理学院,甘肃,兰州,730050;兰州理工大学,理学院,甘肃,兰州,730050 |
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| 基金项目： | 甘肃省自然科学基金(ZS022-A25-020) |
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| 摘 要： | 利用二元胶体的硬球模型,讨论了胶体的熵驱动相变机制,排斥体积发挥了重要作用,增加小球的自由体积,导致系统的平移熵增加,同时系统的混合熵减少,随着溶液浓度增加,必须保证小球有足够的平移熵,导致系统相分离的发生,溶液呈现宏观有序.
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| 关 键 词： | 胶体 熵驱动 相变 晶化 |
| 文章编号： | 1000-5889(2004)02-0133-03 |
| 修稿时间： | 2003-04-07 |
Entropy-driven phase transitions in binary colloidal mixture |
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| LI Yan-long,CHEN Yu-hong,FENG Wang-jun. Entropy-driven phase transitions in binary colloidal mixture[J]. Journal of Lanzhou University of Technology, 2004, 30(2): 133-135 |
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| Authors: | LI Yan-long CHEN Yu-hong FENG Wang-jun |
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| Abstract: | Making use of the hard sphere model in binary colloid, the mechanism of entropy-driven phase transitions was discussed, where the excluded volume plays an important role. Increasing the free volume of small spheres (namely, the excluded volume decreasing) will raise the translational entropy of binary colloid system, at the expense of lowering the mixing entropy. As the solution concentration increasing, it is necessary for the small spheres to have a high enough translational entropy to make,the phase separation occur and the suspension be macroscopically orderly. |
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| Keywords: | binary colloidal entropy-driven phase transition crystal |
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