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폐목재 바이오매스로부터 Carboxymethyl Cellulose의 제조
임부국,이종윤,김부연 한국폐기물자원순환학회 2003 한국폐기물자원순환학회지 Vol.20 No.2
Steam explosion process is one of the most efficient pretreatment method for the utilization of lignocellulose biomass. The carboxymethyl cellulose(CMC) was prepared with steam exploded oak wood by standard method using isopropyl alcohol and monochloroacetic acid. The range of water solubility of carboxymethylated ask exploded wood(EXW) was 60.9 ~84.7 %. The degree of substitution of carboxymethylated oak exploded wood was 0.48 ~ 0.59. The color of carboxymethylated oak wood was brown. When carboxymethylated EXW was purified by sulfuric acid, the yield of carboxymenthylated EXW was lower than non-treated one. However, the color was still brown. In carboxymethylated EXW prepared after delignification, the water solubility and degree of substitution of oak exploded wood were 76.2 ~ 89.5 % and 0.79 ~ 1.05. The values were higher than non-treated. The degree of substitution of purified carboxymethylated wood prepared with delignified EXW, oak exploded wood were 0.70 ~0.88. The color of carboxymethylated wood was white. In prepared carboxymethyl cellulose after delignification treatment from EXW, swelling ratio and water retention value were 76.2 ~ 89.5 and 124.3 ~ 307.6. The spectrum of the FT-IR spectra revealed that absorption band caused by carbonyl group were confirmed.
초산펄프화법에 의해 신문고지로부터 제조된 셀룰로오스 아세데이트의 분석
임부국,이종윤,양재경,장준복 한국펄프종이공학회 2003 펄프.종이기술 Vol.35 No.1
Recently, interest in utilization plan of recycling paper have been enhanced. Therefore, this research aimed to develop the manufacture process of cellulose acetate using old newsprint by acetosolv pulping process. And the manufactured cellulose acetate was also analyzed, especially based on chemical properties. The summarized results in this research were as follows; Reaction time, kind and amount of catalyst, and ratio of liquor to material were varied during acetosolv pulping process of old newsprint. Ratio of liquor to material did not give the significant difference in reaction product. Delignification rate was increased with increasing reaction time during acetosolv pulping, but yield and degree of substitution decreased with increasing reaction time. Sulfuric acid are better catalyst than hydrochloric acid in acetosolv pulping process for old newsprint, and optimal addition amount of catalyst was 1% based on reaction material. Delignification, yield, and degree of substitution were influenced by the catalyst and reaction time. Under pulping condition of $120^{\circ}C$ in 1/12 liquor to material ratio and 60min, degree of substitution was about 0.7. The acetylation reaction was not completely caused by these reaction condition. The examination of the FT-IR spectra revealed that absorption band(1200$\textrm{cm}^{-2}$, 1,750$\textrm{cm}^{-1}$) caused by carbonyl group were confirmed.