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Related Concept Videos

Induced Electric Fields: Applications01:27

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An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
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The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...
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When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
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Cellulose-Based Smart Fluids under Applied Electric Fields.

Kisuk Choi1, Chun Yan Gao2, Jae Do Nam3

  • 1Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea. kisuk929@skku.edu.

Materials (Basel, Switzerland)
|September 12, 2017
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Summary

This review explores cellulose-based electrorheological (ER) fluids, smart materials that change properties under electric fields. These environmentally friendly fluids show promise for industrial applications like dampers and haptic devices.

Keywords:
cellulosecompositedielectric propertyelectrorheological

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Rheology

Background:

  • Cellulose and its derivatives are abundant, eco-friendly materials with diverse applications.
  • Electrorheological (ER) fluids are smart suspensions that exhibit tunable rheological properties in response to applied electric fields.
  • Cellulose-based materials offer unique characteristics suitable for ER fluid formulations.

Purpose of the Study:

  • To review the essential properties of various cellulose types and their derivatives.
  • To highlight the application of these cellulose-based materials in electrorheological suspensions.
  • To discuss the potential of cellulose-based ER fluids in industrial devices.

Main Methods:

  • Literature review of cellulose properties and their derivatives from various sources.
  • Analysis of cellulose-based materials used in electrorheological (ER) fluid systems.
  • Examination of the electrorheological and dielectric responses of these smart fluids.

Main Results:

  • Cellulose particles and their derivatives possess environmentally benign features and natural abundance.
  • These materials form ER suspensions that transition from a liquid-like state to a controllable solid-like state under an electric field.
  • The rheological and dielectric properties of cellulose-based ER fluids are actively controllable.

Conclusions:

  • Cellulose-based smart ER fluids offer tunable characteristics due to their responsive nature.
  • Their controllable rheological and dielectric properties make them suitable for advanced applications.
  • Potential industrial applications include dampers, haptic devices, and other smart fluid systems.