Abstract
Lignin in non-edible woody biomass is a natural aromatic compound containing phenolic structure, and the effective use of lignin is expected as an alternative to petroleum-derived thermosetting resins. Utilizing the hydrothermal treatment of Japanese cedar powder in acetone/water (1:1) solution, low molecular lignin and crystalline cellulose were efficiently isolated in high yields. The obtained lignin showed good melting and curing properties, and a melamine decorative sheet with the lignin revealed practical flexural strength and boiling resistance. From these results, it is expected lignin will be utilized to various practical applications as plant-derived thermosetting resin materials near future.
