Low delay flexible paper-based electrode for capacitive sensor filled through carbon-based materials

Paper-based sensors have good application prospects due to their flexibility and environmental protection. However, paper-based materials are difficult to balance both conductivity and flexibility. This paper mainly reports a high porosity conductive paper based on bamboo wood mixed fiber materials through the wet-manufacture method. The crucial material properties, and long-chain structure of PEDOT:PSS, play an important role in conductivity and flexibility. The relevant experiments show that conductive paper has excellent physical properties and electrical signal transmission capacity. Among them, the conductivity of paper-based electrodes is up to 18.52 S/cm, and there is a low delay in the transmission of the electric signal, when the signal frequency is 300 kHz, the phase frequency angle changes by only 4.9 degrees, not only that, as an electrode, the human pulse signal measured in the capacitive sensor is normal. Under the action of other composite materials, the manufactured electronic paper has a certain mechanical strength, and the thickness is about 90 mu m, lower than ordinary paper products. The research shows that the paper-based electrode has the advantages of high conductivity, low hysteresis, light, and thinness, which provides the possibility to be used as a flexible electrode.