Mixed Ionic-Electronic Covalent Organic Frameworks as a Platform for High-Performance Electro-Responsive Smart Materials

被引:4
作者
Ma, Ruijing [1 ,2 ]
Nie, Wuyang [1 ]
Wang, Yudong [1 ]
Hu, Xufeng [1 ]
Zhao, Xiaopeng [1 ]
Yin, Jianbo [1 ,3 ]
机构
[1] Northwestern Polytech Univ, Sch Phys Sci & Technol, Dept Appl Phys, Smart Mat Lab, Xian 710129, Shaanxi, Peoples R China
[2] Yuncheng Univ, Dept Phys & Elect Engn, Yuncheng 044000, Shanxi, Peoples R China
[3] Northwestern Polytech Univ, Shaanxi Basic Discipline, Sch Phys Sci & Technol, Liquid Phys Res Ctr, Xian 710129, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
POLY(IONIC LIQUID) PARTICLES; TRIAZINE FRAMEWORKS; ELECTRORHEOLOGY; FLUID; POLARIZATION; CONDUCTIVITY; SUSPENSIONS; MECHANISMS; TRANSPORT; PROPERTY;
D O I
10.1021/acs.chemmater.4c01052
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ionic covalent organic framework (iCOF) materials are providing a potential platform to develop next-generation electro-responsive smart materials because of ion movement-induced interfacial polarization. However, it is challenging to achieve strong interfacial polarization while reducing electrode polarization due to the nature of pure ions as charge carriers in iCOF. In this article, we developed a mixed ionic-electronic covalent organic framework (ieCOF), which can overcome this challenge. This ieCOF was prepared by thermal cracking of task-specific ionic liquids. It shows that ieCOF is composed of a positively charged slight-carbonized framework attracted with fluoric counteranions. Through changing the heating target temperature, ieCOF with different ion contents and different carbonized level frameworks can be obtained. We find that compared with the ion-dominated system, the mixed ionic-electronic ieCOF can achieve a stronger interfacial polarization but a weaker electrode polarization. Consequently, the ieCOF has a higher electro-responsive electrorheological (ER) effect but lower leaking current density. In particular, increasing the temperature can promote the interfacial polarization intensity, resulting in a higher ER effect. The present result shows that ieCOF can provide a platform to design and develop high-performance electro-responsive smart materials.
引用
收藏
页码:6961 / 6972
页数:12
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