A_a型Patchy胶体粒子的相态结构

发布时间：2018-06-24 13:12

本文选题：Patchy胶体粒子 + 相图　；参考：《高等学校化学学报》2017年10期

【摘要】：根据热力学微扰理论研究了Aa型Patchy胶体的相态结构,考察了Patch之间的缔合强度及Patch数目对体系相态结构的调控机制.利用相平衡原理给出了Patchy胶体的流体、玻璃态固体和面心立方晶体之间转变及溶胶-凝胶转变的相图,讨论了玻璃态和晶态固相的成核机制、临界现象和相变问题.研究结果表明,Patchy胶体粒子之间的缔合作用和Patch数目可以显著地调控体系的三相点、临界温度和临界密度等特征.在高温条件下,Patchy胶体以一次成核方式结晶;而在低温条件下则以两步成核方式逐步成核结晶,中间经过非晶态的玻璃态固相作为过渡.说明Patchy粒子之间的缔合作用对其相态结构具有决定性影响,因而成为调控体系聚集态结构的重要因素.
[Abstract]:Based on the thermodynamic perturbation theory, the phase structure of a type Patchy colloid was studied, and the association strength between Patch and the regulation mechanism of Patch number on the phase structure of the system were investigated. Based on the phase equilibrium principle, the phase diagrams of the transition between Patchy colloid fluid, glass state solid and face-centered cubic crystal and sol-gel transition are given. The nucleation mechanism, critical phenomena and phase transition of glass and crystalline solid phase are discussed. The results show that the association between the colloidal particles and the number of Patch can significantly regulate the characteristics of the three-phase point, critical temperature and critical density of the system. At high temperature, Patchy colloid crystallizes in a single nucleation mode, while at low temperature, it is nucleated in a two-step nucleation mode, with the transition of amorphous glass solid phase in the middle. It is shown that the association between Patchy particles has a decisive effect on the structure of the phase state, and thus becomes an important factor in the structure of the aggregate state of the system.
【作者单位】：河北大学化学与环境科学学院;河北农业大学理学院;河北大学河北省化学生物学重点实验室;
【基金】：国家自然科学基金(批准号:21374028,21306034) 河北省自然科学基金(批准号:B2014201103) 河北省高层次人才资助项目(批准号:A2016015001) 河北省青年拔尖人才项目河北省普通高校青年拔尖人才计划项目(批准号:BJ2017017)资助~~
【分类号】：O648.11

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