Water Resistance of Porous Carbon Materials made from Rice Hull

抄録

The authors have investigated a new utilization of rice-hull from a viewpoint of the recycling. The rice-hull carbon-material (RHS carbon) is manufactured by mixing the rice-hull particles with a phenol resin, pressure forming, drying, and then carbonizing in the temperature range from 1173K to 1773K. Since the most of the inorganic component is Si in the rice hull, the most of the produced inorganic component in the RHS carbon is Si02, which is stable under wet or water-ret conditions. Therefore, the RHS carbon is expected to be a high water-resistant material.
In this study, the authors measure the compressive strength of the RHS carbon after water immersing and hygroscopic expansion in a deionized water. The compressive strength did not decrease after the water immersing. Moreover, the hygroscopic expansion of the RHS carbon was considerably low. These results clearly showed the advantage of the RHS carbon, comparing to the similar porous carbon materials made from rice bran.