1, Yonsei University, Seoul, SE, Korea (the Republic of)
Polymer/nanoparticle (NP) composite is well known methodology to improve physical and chemical properties depending on its polymerization conditions and kind of NPs such as TiO2, SiO2, Al2O3 and BaTiO3. However, when we applied high amount of NPs, the aggregation was occurred due to its dispersion. To overcome this problem, we optimized the dispersion by choosing the suitable dispersion method according to the viscosity of composites. In less than 10,000 CPs, homogenizer and Ultrasonicator were used to mix NPs into polymers. Higher than 10,000 CPs, however, it is almost impossible to mix NPs into polymer so we changed mixer to plenary machine in the high viscous condition. As a result, a well dispersed polymer/NP composite was fabricated with higher than dielectric constant of 4 via its equipment and observed by HR-SEM and TEM. Furthermore, the high dielectric constant layers were applied to an electrical adhesion robot gripper comprised of robot arm, skin layer and EA layer based on stretchable polymer. The gripper was controlled with voltage ON/OFF to attach and detach target materials.