| 초록 |
In many cases, when polymers are heated in Ar at temperatures over 300 °C, they lose much of their non-carbon content as gases, thus forming carbon. This process is known as carbonization. Numerous precursors [e.g. polyacrylonitrile, polyvinyl chloride, poly(furfuryl alcohol), cellulose, etc.] have been used in attempts to develop carbon. In this study, we fabricated different types of carbon using microcrystalline cellulose (MCC) and cellulose nanocrystals (CNs). Rod-shaped CNs were isolated by acid hydrolysis of MCC and freeze-dried. Both MCC and freeze-dried CNs were carbonized, after which they were activated. We investigated the morphological and thermal properties of MCC, CNs, and carbon based on MCC (CMCC) and CNs (CCNs). Interestingly, unlike CMCC, CCNs made it possible to fabricate carbon materials with controlled morphology, and they had high yield at high temperatures. We also examined the structural and chemical changes of CMCC and CCNs as a function of activation process. |
