Abstract
Cellulose electro-active paper (EAPap) is an attractive material of electro-active polymers (EAPs) family due to its smart characteristics. EAPap is thin cellulose film coated with metal electrodes on both sides. Its large displacement output, low actuation voltage and low power consumption can be used for biomimetic sensors/actuators and electromechanical system. Because cellulose EAPap is ultra-lightweight, easy to manufacture, inexpensive, biocompatible, and biodegradable, it has been employed for many applications such as bending actuator, vibration sensor, artificial muscle, flexible speaker, and can be advantageous in areas such as micro-insect robots, micro-flying objects, microelectromechanical systems, biosensors, and flexible displays.
Highlights
In last few decades, electro-active polymers (EAPs) have received significant attention due to their ability to fabricate large displacement actuators
The shear piezoelectricity in polymers of biological origin such as cellulose and collagen was reported very early in 1950; Fukada experimentally demonstrated the piezoelectric coefficients of wood and verified that oriented cellulose crystallites are responsible for the observed piezoelectricity (Fukada, 2000)
Kim et al (2006a) studied a micro-patterning technique regarded as micro transfer printing, a gold (Au) electrode pattern for a surface acoustic wave (SAW) MEMS device on cellulose electro-active paper (EAPap)
Summary
Electro-active polymers (EAPs) have received significant attention due to their ability to fabricate large displacement actuators. The piezoelectric effect exhibited by cellulose film depends on various factors, type of wood, environmental conditions, and orientation of samples. The early investigation on EAPap actuator characterized by chemically treated paper with thin electrodes on its both sides shows reasonable performance (Kim and Seo, 2002).
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