Jo Yejin, Jeong Du Won, Lee Jeong-O, Choi Youngmin, Jeong Sunho
Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT) 19 Sinseongno, Yuseong-gu Daejeon 305-600 Korea
Department of Chemical Convergence Materials, Korea University of Science and Technology (UST) 217 Gajeongno, Yuseong-gu Daejeon 305-350 Korea.
RSC Adv. 2018 Jun 20;8(40):22755-22762. doi: 10.1039/c8ra04082f. eCollection 2018 Jun 19.
Recently, three-dimensional (3D) printing has garnered tremendous amounts of attention in various applications. In this study, we suggest a facile means of creating 3D-printed foldable electrodes on paper the direct printing of composite pastes consisting of conductive fillers and a thermoplastic elastomer. The 3D-printability of the prepared composite pastes is investigated depending on the rheological properties. It is revealed that the composite paste with a high storage modulus would enable the formation of highly conductive features with a resistance of 0.4 Ω cm on three-dimensional paper structures. The mechanical bending/folding stability levels of the printed electrodes are evaluated to judge the possibility of realizing 3D-printed origami electronics. The resistance is changed slightly with a normalized resistance value of 2.3, when the printed electrodes are folded with a folding angle of 150°. It is demonstrated that the 3D-printed composite electrodes are applicable to various origami electronics, including electrical circuits, strain sensors and electrochemical sensors.
近年来，三维（3D）打印在各种应用中受到了极大关注。在本研究中，我们提出了一种在纸上创建3D打印可折叠电极的简便方法——直接打印由导电填料和热塑性弹性体制成的复合浆料。根据流变特性研究了制备的复合浆料的3D打印性能。结果表明，具有高储能模量的复合浆料能够在三维纸质结构上形成电阻为0.4Ω·cm的高导电特征。评估了打印电极的机械弯曲/折叠稳定性水平，以判断实现3D打印折纸电子产品的可能性。当打印电极以150°的折叠角折叠时，电阻略有变化，归一化电阻值为2.3。结果表明，3D打印复合电极适用于各种折纸电子产品，包括电路、应变传感器和电化学传感器。
