A New Porous Carbon Material made from Rice Bran

概要

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A new porous carbon material has been developed utilizing a natural porous structure of rice bran. The original porous carbon material (rice bran carbon, RBC) are manufactured by mixing the defatted rice bran with a phenol resin, pressure forming, drying, and then carbonizing at 900 °C. Therefore, the RBC has a porous structure. In this study, the authors investigated new manufacturing processes to strengthen the RBC. As a preliminary, the RB carbon particles are manufactured impregnating a phenol resin (25wt.%) with the defatted rice bran and carbonizing at 900°C. In the first strengthening process, the mixture of the carbonized RB carbon particles and a phenol resin are then pressure formed to make a disk-shape RB carbon (CRB). Since the RB carbon particles are brittle and therefore they are broken during the pressure forming, the pore size can be smaller in the CRB than in the RBC. In the second strengthening process, the mixture is injection molded to make a rectangular RB carbon (IMCRB). The pore size is also smaller in the IMCRB. The compressive strength, bending strength and fracture toughness are increased in the both strengthened materials.
秋田大学の論文