Development of cryogenic electrical insulation using bamboo pulp-ice composite system

In recent years, biomaterials have attracted attention in various fields in response to environmental problems. We pay attention to bamboo because it is naturally decomposed and characterized by its excellent elasticity and water absorption properties. We had proposed a bamboo-ice composite system as a substitute for glass fiber reinforced plastics (GFRP) for electrical insulation systems at cryogenic temperatures. In this paper we will report the AC breakdown properties of a bamboo pulp-ice composite system at liquid nitrogen temperature. The bamboo pulp-ice composite system had an AC breakdown strength comparable with GFRP, and can be easily molded in various shapes. We consider that the bamboo pulp-ice composite system is promising as a substitute for GFRP for electrical insulating systems at cryogenic temperatures