| 초록 |
Recently, stretchable electronics have become a fascinating research trend due to its enormous potential to actuate a wide range of smart and wearable applications. Developing stretchable conductive materials for chemical sensors is of interest. For this purpose, a simple process for the synthesis of quasi-solid conductive composite hydrogels based on graphene oxide (GO), short-chain polyurethane (PU), and poly(3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS) is introduced. Through investigating their mechanical properties and electrochemical behaviors, it is found that the nanocomposite hydrogel with PEDOT:PSS has a better conductivity but decrease its deformation sustainability. By increasing the PU content, the composite hydrogels can turn into a quasi-solid state and be very stretchable (＞ 40%). For sensing performance, the hydrogels can be responsive with short response/recovery time towards ultralow concentrations of NH3 and NO2 at ambient conditions. The obtained results indicate that our highly stretchable and electro-responsive hydrogels are potential for the development of multifunctional materials and practical wearable applications. |
