| 초록 |
Lignin, one of the most abundant natural polymers just after cellulose, has been noted as a sustainable chemical resource to replace petroleum-derived products since it contains a high density of aromatic carbon. In this research, we conducted the phenolation of Klason lignin. Klason lignin can be obtained from direct hydrolysis of lignocellulose biomass by sulfuric acid. During the process, lignin is condensed and crosslinked to highly insoluble Klason lignin. However, by the phenolation, Klason lignin become more soluble in the polar organic solvent and the reactivity for further chemical modification is increased. For the phenolation, two heating methods were tried; conventional oil bath heating and microwave assisted heating. Compared to oil bath heating method, microwave method decreased the reaction temperature and reaction time with a substantial degree. Phenolated lignin was analyzed using NMR, TGA, DSC, and then tested for the adhesion properties on various materials. |
