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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국트라이볼로지학회 KTS International Journal KSTLE International Journal Vol.6 No.1
발행연도
2005.6
수록면
28 - 32 (5page)

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The electrorheological (ER) fluids are composed of a colloidal dispersion of polarizable particles in insulating oil, and it's the rheological property changes by the applied electric field. These changed are reversible and occur fast within a few milliseconds. The ER properties of the ER fluid such as increment of viscosity and yield stress come from the particle chain structure induced by electric field. When formulating the ER fluid for a specific application, some requirement must be satisfied, which are high yield stress under electric field, rapid response, and dispersion stability. While this characteristic makes valuable ER fluids in various industrial applications, their long term and quiescent application has been limited because of problems with particle sedimentation. In an effort to overcome sedimentation problem of ER fluids, the anhydrous ER materials of monodispersed hollow polyaniline (PANI) and adipate derivative respectively with submicron-sized suspension providing wide operating temperature range and other advantages were synthesized in a four-step procedure. The ER fluids were characterized by FT-IR, TGA, DLS, SEM, and TEM. Stability of the suspensions was examined by an UV spectroscopy. The rheological and electrical properties of the suspension were investigated Couette-type rheometer with a high voltage generator, current density, and conductivity. And the behavior of ER suspensions was observed by a video camera attached to an optical microscope under 3㎸/㎜. The suspensions showed good ER properties, durability, and particle dispersion.

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Abstract

Introduction

Experimental

Results and Discussion

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