酚／間苯二酚共溶劑液化之酚化柳杉木材之性質

Characteristics of Phenolated Cryptomeria japonica Wood Liquefied with Phenol/Resorcinol Co-solvent

本研究將柳杉（Cryptomeria japonica；Japanese cedar）木材以重量比100／0、75／25、50／50之酚／間苯二酚混合液為溶劑，H2SO4為催化劑，於130℃加熱90min進行液化處理，探討添加間苯二酚對柳杉木材之液化效果及其液化產物之性質。由結果顯示，酚／間苯二酚共溶劑可應用於木材之液化處理，添加間苯二酚者其液化產物之結合酚含量較高，然其液化效果降低，未液化之木材殘渣含量較高，且粘度大幅提升；FT-IR分析顯示液化過程木材之化學組成分被降解，而兩種酚類化合物在液化過程均可與降解之木材組成分結合形成衍生物；GPC分子量分析顯示液化產物之重量平均分子量在1243-1464之間，其中添加間苯二酚為共溶劑者之分子量大於單獨以酚為液化溶劑者；TGA熱重分析顯示液化柳杉之熱裂解行為與柳杉木材不同，其熱裂解溫度較低，此乃由於液化藥劑與木材形成衍生物之鍵結在加熱過程易斷裂，然液化柳杉加熱至800℃之焦炭殘留率則較柳杉木材高。 Cryptomeria japonica D. Don (Japanese cedar) wood was liquefied using the mixture of phenol and resorcinol as a co-solvent, which had the weight ratio of phenol to resorcinol as 100/0, 75/25 and 50/50. The wood liquefaction was underwent at 130℃ for 60 min with H2SO4 as a catalyst. The influence of resorcinol that added into the solvent on the efficiency of liquefaction and the properties of liquefied products were investigated. The results showed that the co-solvent could be used to liquefy wood. The product that liquefied with the co-solvent containing resorcinol had higher combine phenol content. However, the efficiency of the liquefaction would be reduced. They had much amount of un-liquefied wood residue and higher viscosity than that liquefied with phenol as the solvent. FT-IR analysis showed that wood components were degraded during the period of liquefaction and could react with both the phenol and the resorcinol to form derivatives. GPC analysis showed that liquefied products had the weight average molecular weight between 1243 and 1464. Among which, liquefied with the phenol/resorcinol co-solvent had higher molecular weight than that liquefied with phenol alone. TGA analysis showed that the thermal degradation behavior of the liquefied wood was dissimilar to un-liquefied wood. They had a lower thermal degradation temperature due to the weak bonding between the liquefaction reagent and wood component of the derivatives, which would be easy to break during the heat process. However, the liquefied wood had higher char content than wood when heated to 800℃.

Cryptomeria japonica D. Don (Japanese cedar) wood was liquefied using the mixture of phenol and resorcinol as a co-solvent, which had the weight ratio of phenol to resorcinol as 100/0, 75/25 and 50/50. The wood liquefaction was underwent at 130℃ for 60 min with H2SO4 as a catalyst. The influence of resorcinol that added into the solvent on the efficiency of liquefaction and the properties of liquefied products were investigated. The results showed that the co-solvent could be used to liquefy wood. The product that liquefied with the co-solvent containing resorcinol had higher combine phenol content. However, the efficiency of the liquefaction would be reduced. They had much amount of un-liquefied wood residue and higher viscosity than that liquefied with phenol as the solvent. FT-IR analysis showed that wood components were degraded during the period of liquefaction and could react with both the phenol and the resorcinol to form derivatives. GPC analysis showed that liquefied products had the weight average molecular weight between 1243 and 1464. Among which, liquefied with the phenol/resorcinol co-solvent had higher molecular weight than that liquefied with phenol alone. TGA analysis showed that the thermal degradation behavior of the liquefied wood was dissimilar to un-liquefied wood. They had a lower thermal degradation temperature due to the weak bonding between the liquefaction reagent and wood component of the derivatives, which would be easy to break during the heat process. However, the liquefied wood had higher char content than wood when heated to 800℃.