THE MECHANISM OF XYLANASE TREATMENT ON ACIDIC HYDROGEN PEROXIDE BLEACHING OF SULFITE PULP
The mechanism of xylanase (X) treatment on the acidic hydrogen peroxide bleaching (i.e. POs) of magnesium sulfite bamboo/bagasse pulp was studied by X-ray diffraction analysis and FT-IR spectroscopy. Both of the ways can reflect the changes of cellulose crystallization structure of the sulfite pulp in POs bleaching and after X-POs treatment. The celluloses of the studying samples have the same lattice as cellulose-I. X-ray diffraction analysis shows that (002) peaks are sharper than (101) peaks and (101) peaks overlap (10 1 - ) peaks, which are in the form of round-blunt shape. IR spectroscopy analysis shows that conventional POs bleaching pulps and X-POs bleaching pulps are less crystalline than that of unbleached pulp. But X-POs bleaching pulps are more crystalline than POs bleaching pulps. The results indicate that X-POs bleaching is more effective in degrading the residual lignin and protecting carbohydrate than the conventional POs bleaching.
xylanase treatment sulfite pulp acidic hydrogen peroxide bleaching mechanism
Qiu Yugui Yun Na Chen Chunxia
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, Dongguan Quality Supervision Testing Center,Dongguan, 523808, China
国际会议
广州
英文
542-545
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）