| 초록 |
The biodegradable electro active shape memory actuators were developed by polyurethane based PLA composite with multi walled carbon nanotube were prepared by the melt mixer process, which was followed by hot compression molding. The morphology of carbon nanotube filler in polyurethane matrix and resulting conductivity of the composites were investigated. Their thermal and mechanical properties and electro active shape memory behavior were studied by Fourier transform infrared (FTIR), Differential Scanning Calorimetry (DSC), wide angle X-ray diffraction (WAXD), tensile and dynamic mechanical analysis (DMA). The Tgs of these composites were in range of 33 – 53oC and influenced by ratio of PLA in addition of self and hard segment. These materials can restore their shapes almost completely attain 100% original position with apply 50 v in 10 sec. Therefore these PU/PLA/ MWNT composites are expected to find out medical application |
