抄録
Carbonization behavior of the mulberry silk, the tussah silk and the component amino acids have been investigated. From the silk, non-graphitizing carbon could be obtained with a yield of 30%, which was much higher than the value measured for the cellulose-based carbon. The tussah silk showed a higher thermolysis temperature than the mulberry silk, while there was no marked difference in the yield of carbon between these silks. At early stage of carbonization of the silk, amide bonding was dissociated at temperatures higher than 300oC, and the amorphous sericin and fibroin were liquefied. The degummed crystalline fibroin fiber, however, was not liquefied during carbonization. The activated carbon from mulberry silk did not show adsorption of methylene blue (MB), while that from tussah silk showed adsorption of MB of about 60 mg/g.
