Record number :
1796391
Title of article :
Structural and electrorheological properties of mesoporous silica modified with triethanolamine
Author/Authors :
Cheng، نويسنده , , Qilin and Pavlinek، نويسنده , , Vladimir and He، نويسنده , , Ying and Lengalova، نويسنده , , Anezka and Li، نويسنده , , Chunzhong and Saha، نويسنده , , Petr، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
6
From page :
169
To page :
174
Abstract :
In this work, mesoporous silica (MCM-41) was modified by triethanolamine (TEA) by a wet impregnation method. The structure and morphology of modified MCM-41 particles were characterized by X-ray diffraction, N2 adsorption/desorption, Fourier-transform infrared spectra, scanning electron microscopy, particle size analyzer and thermogravimetric analysis. The results show that the interior channels of MCM-41 are modified by TEA without destroying its mesoporous structure. Further, pure MCM-41and TEA-modified particles were adopted as dispersed phase in silicone oil for electrorheological (ER) investigation. The TEA-MCM-41 (modified with 7 wt.% TEA)-based ER fluid with a volume fraction of 5% exhibits stronger ER activity than pure MCM-41 fluid. The possible mechanism related to dielectric properties is also provided.
Keywords :
Triethanolamine , dielectric properties , mesoporous silica , Electrorheological fluid
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Serial Year :
2008
Link To Document :
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