高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (5): 1042.doi: 10.7503/cjcu20190709

• 物理化学 • 上一篇    下一篇

偶极Janus粒子的相态结构调控及应用

李红红1,耿科颖1,田芙月1,顾芳1,*(),王海军1,2,*()   

  1. 1. 河北大学化学与环境科学学院
    2. 河北省化学生物学重点实验室, 保定 071002
  • 收稿日期:2019-12-25 出版日期:2020-05-10 发布日期:2020-02-17
  • 通讯作者: 顾芳,王海军 E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • 基金资助:
    国家自然科学基金(21374028);河北省高层次人才资助项目(A2016015001);河北省普通高校青年拔尖人才计划项目(BJ2017017)

Regulation of Phase State of Dipolar Janus Particles and Its Application

LI Honghong1,GENG Keying1,TIAN Fuyue1,GU Fang1,*(),WANG Haijun1,2,*()   

  1. 1. College of Chemistry and Environmental Science
    2. Chemical Biology Key Laboratory of Hebei Province, Hebei University, Baoding 071002, China
  • Received:2019-12-25 Online:2020-05-10 Published:2020-02-17
  • Contact: Fang GU,Haijun WANG E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(21374028);the Project for Talent Engineering of Hebei Province, China(A2016015001);the Top Young Talent Project for General Colleges of Hebei Province, China(BJ2017017)

摘要:

基于热力学微扰理论研究了偶极Janus粒子的聚集态结构及相态特征, 考察了粒子间的缔合作用、 偶极作用及外电场对体系相态结构的调控机制. 结果表明, 在偶极Janus粒子的聚集过程中, 粒子间的链型结构与支化结构之间存在竞争, 致使其平衡相行为显著有别于常规流体的相行为. 作为应用, 计算了偶极Janus粒子体系的介电常数, 得到其类气相及类液相的介电常数与缔合作用、 偶极作用及外电场的依赖关系.

关键词: 偶极Janus粒子, 相平衡, 聚集态结构, 介电常数

Abstract:

The aggregation and phase states of dipolar Janus particles were presented based on the thermodynamic perturbation theory. An attempt was made to find how the association, dipole-dipole interaction and external electric field regulate the cluster structures and properties of the system. It was shown that there existed a competition between chainlike and branched structures in a cluster, which resulted in an entirely different phase behavior from the common fluids. As an application, the dielectric constants for the gas-like and liquid-like phases were carried out, which demonstrated a significant dependence on the association, dipole-dipole interaction and external electric field. Interestingly, the reproducibility of dielectric constant with changeable temperature for the liquid-like phase was found, which could be useful for designing the relevant materials.

Key words: Dipolar Janus particle, Phase equilibria, Aggregation state, Dielectric constant

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