TY - JOUR
T1 - Color evolution of poplar wood chips and its response to lignin and extractives changes in autohydrolysis pretreatment
AU - Wang, Xiaodi
AU - Hou, Qingxi
AU - Zhang, Xin
AU - Zhang, Yongchao
AU - Liu, Wei
AU - Xu, Chunlin
AU - Zhang, Fangdong
N1 - Har kontaktat [email protected], [email protected] 19.2.20 /MF
accepted manuscript
embargo 12 mån
CC-BY-NC-ND
PY - 2020/8/15
Y1 - 2020/8/15
N2 - Combining chemi-mechanical pulping with autohydrolysis pretreatment is an efficient and value-added utilization approach for lignocellulosic biomass in paper industry. To further promote the utilization of autohydrolyzed biomass in chemi-mechanical pulping, the color evolution of poplar wood chips in autohydrolysis pretreatment and its chromogenic mechanism were investigated by using CIELab color system, FT-IR, NMR and GPC. The results showed that the total color difference ΔE* increased obviously, which were remarkable as the combined hydrolysis factor (CHF) increased. The lignin content led to a more significant influence on the color of poplar wood chips than the extractives. The autohydrolysis pretreatment with a higher CHF accelerated the degradation and subsequent condensation of lignin, resulting in the formation of chromophoric groups, such as Hibbert ketone, quinones and quinone methides. It is of great significance for biomass refinery and paper industry to reveal the color evolution of poplar wood chips caused by autohydrolysis pretreatment from the point of view of chemical components' structure.
AB - Combining chemi-mechanical pulping with autohydrolysis pretreatment is an efficient and value-added utilization approach for lignocellulosic biomass in paper industry. To further promote the utilization of autohydrolyzed biomass in chemi-mechanical pulping, the color evolution of poplar wood chips in autohydrolysis pretreatment and its chromogenic mechanism were investigated by using CIELab color system, FT-IR, NMR and GPC. The results showed that the total color difference ΔE* increased obviously, which were remarkable as the combined hydrolysis factor (CHF) increased. The lignin content led to a more significant influence on the color of poplar wood chips than the extractives. The autohydrolysis pretreatment with a higher CHF accelerated the degradation and subsequent condensation of lignin, resulting in the formation of chromophoric groups, such as Hibbert ketone, quinones and quinone methides. It is of great significance for biomass refinery and paper industry to reveal the color evolution of poplar wood chips caused by autohydrolysis pretreatment from the point of view of chemical components' structure.
KW - Chromogenic mechanism
KW - Color evolution
KW - Chromogenic mechanism
KW - Color evolution
KW - Chromogenic mechanism
KW - Color evolution
U2 - 10.1016/j.ijbiomac.2019.11.224
DO - 10.1016/j.ijbiomac.2019.11.224
M3 - Article
SN - 0141-8130
VL - 157
SP - 673
EP - 679
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -