Structural features of dioxane lignin from Eucalyptus globulus and their relationship with the pulp yield of contrasting genotypes

作者: María Graciela Aguayo , José Ruiz , Marcela Norambuena , Regis Teixeira Mendonça

DOI: 10.4067/S0718-221X2015005000055

关键词: Pulp and paper industryPulp (paper)Kraft paperLigninKraft processKappa numberEucalyptus globulusMaterials scienceChemical structurePulpwood

摘要: The chemical structure of dioxane lignins isolated from two groups Eucalyptus globulus genotypes with contrasting pulpwood characteristics were evaluated. Six selected and separated in (G1 G2) based on differences wood density, pulp yield characteristics. Lignin was both milled kraft pulps produced at kappa number 16, characterized by different techniques such as FTIR, elemental analysis, molar mass distribution 31P NMR spectroscopy. From the evaluated, some determined more relevant, syringyl (S) guaiacyl (G) amounts, S/G ratio condensed biphenyl units, correlated yield. High correlations found between units (R2 = 0,69), syringyl/guaicyl 0,88). 5-5 presented a negative correlation 0,76). information obtained explained part difference pulpability can be used for selection improvement species paper industry.

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