Abstract:
Electrically-induced bending of Selemion IPMC is caused by the charge induced into the IPMC. This
induced charge quantity is susceptible to the absolute humidity of environment. There are two
types of charges, the charge causing bending and the rest of charge that causes no bending. In the
high humidity environments, where absolute humidity is above 10 gm−3, the quantity of charge
causing no bending accounts for the large part of whole charge induced into the Selemion IPMC,
while quantity of such charge is negligibly small at the absolute humidity of less than 10 gm−3. Estimating
the quantity of those two types of charges individually, we successively analyzed the
bending stability of Selemion IPMC at the absolute humidity above 10 gm−3. Consequently, we deduced
the following conclusions. 1) There exists a large time delay in the current in response to
the voltage input, 2) Current is highly dumping, and 3) Bending behavior is marginally stable under
the input of any frequency.
