| 초록 |
Carbon aerogels are novel mesoporous carbon materials with many interesting properties, such as low mass densities, continous pore structures, high surface areas, great mesopore volume and high electrical conductivity. Carbon aerogel was prepared by a sol-gel polymerization of resorcinol with formaldehyde, and sodium carbonate was added as a catalyst. Physical properties of carbon areogel were characterized by infrared spectroscopy (IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). It is found that carbon aerogel is amorphous materials with a pearly network structure, and it consists of one or two diffuse X-ray peaks. With the addition of sodium carbonate, an CO2 supercritical drying technique was developed for the fabrication of carbon arogels. As a result, the addition of sodium carbonate increases the size of carbon nanoparticles and the pore size of the aerogels. |
