偶极Janus粒子的相态结构调控及应用  

Regulation of Phase State of Dipolar Janus Particles and Its Application

作　　者：李红红 耿科颖 田芙月 顾芳[1] 王海军[1,2] LI Honghong;GENG Keying;TIAN Fuyue;GU Fang;WANG Haijun(College of Chemistry and Environmental Science;Chemical Biology Key Laboratory of Hebei Province,Hebei University,Baoding 071002,China)

机构地区：[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

出　　处：《高等学校化学学报》2020年第5期1042-1047,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21374028)、河北省高层次人才资助项目(批准号:A2016015001);河北省普通高校青年拔尖人才计划项目(批准号:BJ2017017)资助.

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.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.

关 键 词：偶极Janus粒子 相平衡 聚集态结构 介电常数 

分 类 号：O642[理学—物理化学] O631[理学—化学]