Ionic-liquid-modified TiO2 spheres and their enhanced electrorheological responses

被引：15
作者：
Zhang, Guangchen [1 ]
Zhao, Xiuhu [1 ]
Jin, Xiao [1 ]
Zhao, Zhenjie [1 ]
Ren, Yongming [1 ]
Wang, Li-Min [1 ]
Liu, Ying Dan [1 ]
Choi, Hyoung Jin [2 ]
机构：
[1] Yanshan Univ, Coll Mat Sci & Engn, State Key Lab Metastable Mat & Technol, Qinhuangdao 066004, Hebei, Peoples R China
[2] Inha Univ, Dept Polymer Sci & Engn, Incheon 402751, South Korea
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2021年 / 338卷
基金：
中国国家自然科学基金;
关键词：
Ionic liquid; Titanium dioxide; Electrorheological fluid; Dielectric relaxation; ORGANICALLY MODIFIED SILICA; SOLID-STATE; PERFORMANCE; PARTICLES; BEHAVIOR; NANOPARTICLES; MICROSPHERES; FLUID; SUSPENSIONS; IONOGELS;
D O I：
10.1016/j.molliq.2021.116696
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：
An ionic liquid functionalised silane agent, 1-(3-triethoxysilylpropyl)-3-methylimidazolium chloride (TESPM-IL), was prepared and used to fabricate ionic liquid (IL)-grafted titanium dioxide (IL-TiO2) spheres via a sol-gel process. Thermogravimetric analysis and Fourier transform infrared spectroscopy confirmed that TESPM-IL was attached to TiO2 spheres. Morphologies of the IL-TiO2 spheres were observed by scanning electron microscopy and transmission electron microscopy, indicating the rough surface and smaller size of the IL-TiO2 particles caused by the modification of TESPM-IL. The IL-TiO2 particles were applied as a new dispersed-phase material of electrorheological (ER) fluids. The ER effect of IL-TiO2 particles was studied and compared with that of pure TiO2 particles. It was found that, upon the introduction of TESPM-IL, both yield stress and storage modulus of the IL-TiO2 ER fluid were enhanced significantly, thus improving the ER effect of TiO2- or inorganic-based ER materials effectively. Dielectric analysis was also used to observe the interfacial polarization process of the particles, which confirmed the effect of the IL layer on the surface of the TiO2 particles. (C) 2021 Published by Elsevier B.V.
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页数：11
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