1, Yonsei University, Seoul, SE, Korea (the Republic of)
The polymer layers could be easily deformed by external force because of its intrinsic elasticity. In the case of multi-layered polymer thin films, however, it could bring a certain problem. If the adhesion between the interfaces isn't sufficient, slip may be occurred. Particularly, the nanoparticles such as TiO2, SiO2, Al2O3 and BaTiO3 dispersed polymers are further modified and affects to the adhesive force. Therefore, it is necessary to predict the relationship among deformation, composites and interfacial adhesion. In this study, the modulus and interfacial strength of whole layers were measured by Universal Test Machine (UTM) in the ASTM-638. Based on this result, the maximized interfacial adhesion value was confirmed less than 10 N with 200 μm thickness. For the test, the pristine polymer and NP embedded polymer were spin coated to form bilayer shape with single layer tail. As a result, the NP contained polymer showed similar mechanical strength with double error range 1 N compared to the pristine polymer’s modulus. Furthermore, we also introduced an adhesive layer such as primer and polyethylene imine (PEI) added PDMS to improve the interfacial adhesion. With NP/PDMS composites, we applied to electroadhesion (EA) robot gripper. NPs have higher dielectric constant than polymer so that it can increase EA force in the same potentials. Furthermore, the critical parts of robot gripper are skin layer and EA layer. Both of skin and EA layers are composed of stretchable polymers so that our achievement could be used for it. As a result, highly adhesive EA gripper was investigated by solving interfacial adhesive problem.