Department of Chemical Engineering, Faculty of Engineering, Minia University, El-Minya, Egypt.
Department of Biomedical Engineering, Faculty of Engineering, Minia, University, El-Minya, Egypt.
IET Nanobiotechnol. 2019 Feb;13(1):1-5. doi: 10.1049/iet-nbt.2018.5125.
It is time for electrodes prepared from graphene oxide (GO) to replace the traditional electrodes. However, GO is an electrically insulating material. However, in this study, a conductive electrode was prepared from GO modification with glycerol (GL) under the esterification reaction at 90°C for 3 h with sulphuric acid as a catalyst under vacuum conditions. Polyvinyl alcohol (PVA) acts as a polymer host. It was mixed with GO and modification was carried out under heating conditions. The mixture of the GO/GL/PVA nanocomposite was rapidly cooled and poured into the electrode mould. Finally, it is placed in a desiccator at room temperature for two days. The characterisation (Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy) proved that the ester bond was formed and a complete distribution of GO/GL into the matrix of PVA was verified. The GO/GL/PVA nanocomposite was tested for electrocardiogram (ECG) electrodes. The biopic instrument was used to compare the behaviour of the GO/GL/PVA plastic electrode and the commercial one. The results indicated that the GO/GL/PVA plastic electrode efficiently detected ECG signals after two months with high conductivity and lower noise than the commercial electrode. The GO/GL/PVA plastic electrode has been reported for the first time in the literature.
是时候用氧化石墨烯（GO）制备的电极来取代传统电极了。然而，GO 是一种电绝缘材料。然而，在这项研究中，通过在 90°C 下用硫酸作为催化剂在真空条件下进行酯化反应 3 小时，用甘油（GL）对 GO 进行改性，制备了一种导电电极。聚乙烯醇（PVA）作为聚合物主体。将其与 GO 混合，并在加热条件下进行改性。GO/GL/PVA 纳米复合材料的混合物被迅速冷却并倒入电极模具中。最后，将其放置在室温下的干燥器中两天。通过傅里叶变换红外光谱、X 射线衍射和扫描电子显微镜对其进行了表征，证明了酯键的形成，并且证实了 GO/GL 完全分布在 PVA 基质中。对 GO/GL/PVA 纳米复合材料进行了心电图（ECG）电极测试。使用生物电仪器比较了 GO/GL/PVA 塑料电极和商用电极的性能。结果表明，GO/GL/PVA 塑料电极在两个月后能够高效地检测 ECG 信号，具有较高的导电性和比商用电极更低的噪声。GO/GL/PVA 塑料电极在文献中首次被报道。
