Effect of structural features of wood Biopolymers on hardwood pulping and bleaching performance

authors	Pinto, PC; Evtuguin, DV; Neto, CP
nationality	International
journal	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
keywords	EUCALYPTUS-GLOBULUS LABILL; LIGNIN; BLEACHABILITY; BEHAVIOR
abstract	Industrial hardwoods such as Eucalyptus species, Betula pendula, and Acacia mangium required different chemical charges during kraft pulping and presented distinct profiles of polysaccharides removal. The corresponding kraft, pulps showed different chlorine dioxide consumption during bleaching. Woods and corresponding kraft pulps were characterized by chemical methods, H-1 and C-13 NMR spectroscopy, X-ray diffraction analysis, and gel permeation chromatography. The ease of lignin degradation and dissolution was essentially determined by differences in the proportion of syringyl and guaiacyl units and in the degree of condensation. The bleaching response was shown to be related also to the content of beta-O-4 structures in the residual lignin. The relative stability of xylans during the pulping was suggested to be associated with differences in structure and molecular weight. The higher retention of Eucalyptus xylans was attributed essentially to their peculiar structure, including O-2-substituted uronic acid groups linked to other cell wall polysaccharides.
publisher	AMER CHEMICAL SOC
issn	0888-5885
year published	2005
volume	44
issue	26
beginning page	9777
ending page	9784
digital object identifier (doi)	10.1021/ie0580760o
web of science category	Engineering, Chemical
subject category	Engineering
unique article identifier	WOS:000234104600001