The effect of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIPF 6 ) dispersion on the structure, thermal stability and electromechanical behavior of cellulose was investigated by infrared spectroscopy, X-ray diffraction, thermogravimetry and bending actuation test. Dispersion of BMIPF 6 in cellulose matrix was carried out by solution blending technique. Upon dispersion of 20 wt % BMIPF 6, the bending displacement of the actuator was enhanced by four times as compared to that of pristine cellulose. However, BMIPF 6 dispersion resulted in increased amorphous region and reduced its thermal stability of cellulose. This might be due to interruption of cellulose crystallization by entrapment of BMIPF 6 molecules between cellulose layers and weakening of the intra- and intermolecular hydrogen bonds of cellulose. Humidity effect and the durability of the BMIPF 6 dispersed cellulose actuator are discussed.
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Mahadeva et al. (2009) studied this question.
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