Study on Surface Discharge Characteristics of GO-Doped Epoxy Resin-LN2 Composite Insulation was written by Xing, Yunqi;Chen, Yuanyuan;Yuan, Ruiyi;Yang, Zhuoran;Yao, Tianyi;Li, Jiehua;Zhu, Wenbo;Wang, Xiaoxue. And the article was included in Polymers (Basel, Switzerland) in 2022.Name: 4,4′-Methylenediphenol The following contents are mentioned in the article:
Superconducting power lead equipment for epoxy insulation, such as high-temperature superconducting DC power or liquefied natural gas energy pipelines, as well as high-temperature superconducting cables, has long been used in extreme environments, from liquid nitrogen temperatures to normal temperatures It is easy to induce surface discharge and flashover under the action of strong elec. field, which accelerates the insulation failure of current leads. In this paper, two-dimensional nano-material GO was used to control the elec. properties of epoxy resins. The DC surface discharge and flashover characteristics of the prepared epoxy resin-GO composite insulation materials were tested at room temperature with liquid nitrogen. The surface discharge mechanism of the epoxy resin-GO composite insulation materials was analyzed. The exptl. results show that the insulation properties of epoxy composites doped with GO changed. Among them, the surface flashover voltage of 0.05 wt% material is the best, which can inhibit the discharge phenomenon and improve its insulation properties in extreme environments, from room temperature to liquid nitrogen temperature It is found that the development process of surface discharge of composite insulating materials under liquid nitrogen is quite different from that under room temperature Before critical flashover, the repetition rate and amplitude of surface discharge remain at a low level until critical flashover. Furthermore, the voltage of the first flashover is significantly higher than that of the subsequent flashover under the action of the desorption gas on the surface of the composite insulating material and the gasification layer produced by the discharge. Given that the surface flashover voltage of 0.05 wt% epoxy composite is the best, the research and anal. of 0.05 wt% composite is emphasized. In the future design of superconducting power lead insulation, the modification method of adding GO to epoxy resin can be considered in order to improve its insulation performance. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Name: 4,4′-Methylenediphenol).
4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Name: 4,4′-Methylenediphenol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts