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by yummypaint 1116 days ago
This sounds like an "electroactive polymer." there are some squishy tapes made by 3m that incidentally have this property out of the box. Make a spot of conductive carbon paint on each side, apply a few kV, and watch the spots double in area as the electrostatic forces squish the material.
1 comments

The article mentiones "conductive grease" that is added to the membrane.