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ELECTRORHEOLOGICAL PROPERTIES OF POLYANILINE/PUMICE COMPOSITE SUSPENSIONS

Chinese Journal of Polymer Science 2007年第4期25卷 347-355页

作者： Mustafa Yavuz Department of Chemistry Faculty of Arts and ScienceSüleyman Demirel University32260 IspartaTurkey

Electrorheological （ER） properties of polyaniline （PAni）, pumice and polyaniline/pumice composites （PAPC） were investigated. Polyaniline and PAni/pumice composite were prepared by oxidative polymerization. PAni/pumice particlesbased ER suspensions were prepared in silicone oil （SO）, and their ER behavior was investigated as a function of shear rate, electric field strength, concentration and temperature. Sedimentation stabilities of suspensions were determined. It has been found that ER activity of all the suspensions increases with increasing electric field strength, concentration and decreasing shear rate. It has shown that the suspensions have a typical shear thinning non-Newtonian viscoelastic behavior. Yield stress of composite suspensions increased linearly with increasing applied electric field strength and with concentrations of the particles. The effect of high temperature on ER activity of purrfice/silicone oil systems was also investigated.

关键词： electrorheology Yield stress Pumice Composite Suspension

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Research on the Influence of Spring Stiffness on the Electrorheological Isolator

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Journal of Beijing Institute of Technology 2007年第4期16卷 409-413页

作者：张振华王娟张少华 School of Mechanical and Vehicular Engineering Beijing Institute of Technology

The problem of electrorheological(ER) technology’s application in the vibration isolation system is emphatically studied. Based on the particular characteristics of the electrorheological fluid (ERF) tunable damping, a metal-spring ER isolator is designed and its working principle is mainly discussed. By theoretical analysis of its simplified physical model, the dynamic response of an ER isolator is sensitive to the system equivalent spring stiffness K and ERF damping coefficient C. According to the dynamic performance tests, the result confirms that applying different electric field strength can change the dynamic peculiarity of the metal-spring ER isolator. The configuration design parameters of the ER equipment, such as the stiffness ratio of two fluid chambers and the size of the electric field, are important factors for the tunable range of ER isolator.

关键词： electrorheology vibration control isolator stiffness ration

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热氧化的导电聚合物纳米纤维基电流变液(英文)

热氧化的导电聚合物纳米纤维基电流变液(英文)

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第六届全国电磁流变液及其应用学术会议

作者：尹剑波夏翔王笑笑畅润田向礼琴赵晓鹏西北工业大学应用物理系智能材料实验室

Electrorheological (ER) fluid, which can be transformed rapidly from a fluid-like state to a solid-like state under an external electric field, is considered to be one of the most important smart fluids. However, the traditional microparticle-based ER fluid subjected to challenges in practical applications due to the lack of versatile performances. Recent researches of using nanoparticles as the dispersal phase have led to new interest in the development of non-conventional ER fluid with improved performances. In this topic, we especially introduce our recent researches on ER fluid based on various thermal- oxidative conducting polymer nanofibers. The goal is to highlight the advantages of using the anisotropic nanostructured materials as dispersal phase to improve ER performances.

关键词： electrorheology nanofibers conducting polymer thermal-oxidation treatment

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