TY - JOUR AU - 김선정 DA - 2018/09 PY - 2018 UR - https://pubs.acs.org/doi/10.1021/acsami.8b12426 UR - https://repository.hanyang.ac.kr/handle/20.500.11754/120060 AB - Graphene-based actuators are of practical interest because of their relatively low cost compared with other nanocarbon materials, such as carbon nanotubes. We demonstrate the simple fabrication of graphene oxide (GO)-based fibers with an infiltrated nylon-6,6 polymer by wet spinning. These fibers could be twisted to form torsional actuators and further coiled to form tensile actuators. By controlling the relative twisting and coiling direction of the GO/nylon fiber, we were able to realize reversible contraction or elongation actuation with strokes as high as -80 and 75%, respectively, when the samples were heated to 200 degrees C. The tensile actuation showed a remarkably little hysteresis. Moreover, this GO/nylon actuator could lift loads over 100 times heavier than itself and generate a stable actuation at high temperatures over the melting point of the polymer. This novel kind of GO-based actuator, which has a multidirectional actuation, has potential for a wide range of applications such as artificial muscles, robotics, and temperature sensing. PB - AMER CHEMICAL SOC KW - graphene oxide KW - nylon KW - torsion KW - tensile KW - actuation KW - temperature TI - Thermally Responsive Torsional and Tensile Fiber Actuator Based on Graphene Oxide IS - 38 VL - 10 DO - 10.1021/acsami.8b12426 T2 - ACS APPLIED MATERIALS & INTERFACES ER -