Influence of liquid phase on nanoparticle-based giant electrorheological fluid

被引:49
作者
Gong, Xiuqing [1 ]
Wu, Jinbo [1 ]
Huang, XianXiang [1 ]
Wen, Weijia [1 ]
Sheng, Ping [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China
关键词
D O I
10.1088/0957-4484/19/16/165602
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We show that the chemical structures of silicone oils can have an important role in the giant electrorheological ( GER) effect. The interaction between silicone oils and solid nanoparticles is found to significantly influence the ER effect. By increasing the kinematic viscosity of silicone oils, which is a function of siloxane chain length, sol-like, gel-like and clay-like appearances of the constituted ER fluids were observed. Different functional-group-terminated silicone oils were also employed as the dispersing media. Significant differences of yield stress were found. We systematically study the effect of siloxane chain lengths on the permeability of oils traveling through the porous spaces between the particles ( using the Washburn method), oils adsorbed on the particles' surface ( using FT-IR spectra), as well as their particle size distribution ( using dynamic light scattering). Our results indicate the hydrogen bonds are instrumental in linking the silicone oil to GER solid particles, and long chain lengths can enhance the agglomeration of the GER nanoparticles to form large clusters. An optimal oil structure, with hydroxyl-terminated silicone oil and a suitable viscosity, was chosen which can create the highest yield stress of similar to 300 kPa under a 5 kV mm(-1) DC electric field.
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页数:7
相关论文
共 60 条
[1]  
AGGARWAL SL, 1975, POLYM HDB, pR5
[2]  
ALAIN S, 1997, J COLLOID INTERF SCI, V186, P60
[3]   Electrorheological properties of suspensions of silica nanoparticles modified by urea and N,N-dimethylformamide [J].
Belza, Tomas ;
Pavlinek, Vladimir ;
Saha, Petr ;
Quadrat, Otakar .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2007, 297 (1-3) :142-146
[4]   Wettability alteration by CTAB adsorption at surfaces Of SiO2 film or silica gel powder and mimic oil recovery [J].
Bi, ZC ;
Liao, WS ;
Qi, LQ .
APPLIED SURFACE SCIENCE, 2004, 221 (1-4) :25-31
[5]   Investigations on zeolite-based ER fluids supported by experimental design [J].
Böse, H .
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1999, 13 (14-16) :1878-1885
[6]   Preparation and electrorheological properties of triethanolamine-modified TiO2 [J].
Cao, J. G. ;
Shen, M. ;
Zhou, L. W. .
JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (05) :1565-1568
[7]   Dynamics of liquid penetration into capillary tubes [J].
Chebbi, R. .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 315 (01) :255-260
[8]   Electrorheological response of modified silica suspensions [J].
Cherif, Khaled ;
Moalla, Salma ;
Sassi, Sadok ;
Zarrouk, Hedi .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (2-3) :1199-1202
[9]   Enhanced electrorheology of conducting polyaniline confined in MCM-41 channels [J].
Cho, MS ;
Choi, HJ ;
Ahn, WS .
LANGMUIR, 2004, 20 (01) :202-207
[10]   Synthesis and electrorheology of mesoporous particle suspensions [J].
Choi, HJ ;
Cho, MS ;
Ahn, WS .
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2002, 16 (17-18) :2514-2520