Variable Rigidity Module with a Flexible Thermoelectric Device for Bidirectional Temperature Control
- Variable Rigidity Module with a Flexible Thermoelectric Device for Bidirectional Temperature Control
- 김승원; Choong Sun Kim; Ock Kyun Oh; Hyeongdo Choi; Yong Jun Kim; Gyu Soup Lee; Hyun Jung Kim; Carmel Majidi; Byung Jin Cho
- variable stiffness; phase change materials; thermoelectric cooler; active temperature control; low melting point material; flexible thermoelectric device
- Issue Date
- Soft Robotics
- VOL 게재예정, 게재예정
- Dynamic stiffness tuning is a promising approach for shape reconfigurable systems that must adapt their flexibility in response to changing operational requirements. Among stiffness tuning technologies, phase change materials are particularly promising because they are size scalable and can be powered using portable electronics. However, the long transition time required for phase change is a great limitation for most applications. In this study, we address this by introducing a rapidly responsive variable rigidity module with a low melting point material and flexible thermoelectric device (f-TED). The f-TED can conduct bidirectional temperature control; thereby, both heating and cooling were accomplished in a single device. By performing local cooling, the phase transition time from liquid to solid is reduced by 77%. The module in its rigid state shows 14.7 x higher bending stiffness than in the soft state. The results can contribute to greatly widening the application of phase transition materials for variable rigidity.
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