Department of Mechanical Engineering, Faculty of Engineering
Department of Hydrogen Energy Systems, Graduate School of Engineering
Department of Mechanical and Aerospace Engineering, Mechanical Engineering Course, School of Engineering
Rubbers and polymeric materials are used as sealing devices of high-pressure hydrogen gas in equipments for hydrogen energy systems. For example, rubber O-ring for hydrogen gas sealing could be broken by high-pressure hydrogen exposure.
In our laboratory, we are going to clarify the fracture phenomenon of rubber and polymeric materials exposed to the high-pressure hydrogen gas. In order to clarify the influence of dissolved hydrogen on the fracture behavior of the materials, we have been performing thermal desorption analyses and nuclear magnetic resonance measurements of the dissolved hydrogen gas in the materials. To establish material design guideline for high-pressure hydrogen sealing materials, we are continuously discussing about the relationship between fracture behavior of the materials and their composition or molecular structure.
Blister fracture of rubber O-ring for high-pressure hydrogen gas seal
Prof. Shin Nishimura