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Download Electro-Active Polymers (Issac Garza)
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Electro-Active Polymers By: Isaac Garza MEEN 3344 What are Electro-Active Polymers? First discovery were in 1880 by Wilhelm Röntgen Two types of electro-active polymers Natural Artificial A lightweight strip of highly flexible plastic that bends and functions similarly to a human finger when an electrical voltage is applied to it. How are they Used? Artificial Muscles Small Robotic Devices Two Categories of EAP Dry Polymers Electrostrictive, Electrostatic, Piezoelectric, Ferroelectric Require high activation voltage (>100 V/µm) They can also be made to hold DC voltage which would allow robotic applications They also have a greater mechanical energy density Wet Polymers Ion exchange, conductive polymers, gels Only a 1-2 drive voltage is required There is a need to maintain their wetness It is difficult to sustain DCsustained displacements EAP Materials Dry Polymers Electrostrictive graft elastomers, electrostrictive paper, electro-viscoelastic elastomers, liquid crystal elastomer materials Wet Polymers Carbon nanotubes, conductive polymers, electrorheological fluids, ionic polymer gels References http://ndeaa.jpl.nasa.gov/ndeaapub/Japan/biomimetic-polymers-handbook.pdf http://ndeaa.jpl.nasa.gov/nasa-nde/lommas/aahp.htm
