Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility

dc.creatorTroncoso-Ortega, Eduardo
dc.creatorCastillo, Rosario del P.
dc.creatorReyes-Contreras, Pablo
dc.creatorCastano-Rivera, Patricia
dc.creatorTeixeira Mendonca, Regis
dc.creatorSchiappacasse, Nicolas
dc.creatorParra, Carolina
dc.date2021
dc.date2021-10-04T18:54:33Z
dc.date2021-10-04T18:54:33Z
dc.date.accessioned2022-10-18T14:52:22Z
dc.date.available2022-10-18T14:52:22Z
dc.identifierBIOMOLECULES,Vol.11,,2021
dc.identifierhttp://repositoriodigital.uct.cl/handle/10925/4355
dc.identifier10.3390/biom11040507
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4444071
dc.descriptionThe objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S-0), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 98.5% of original glucans were retained in the pre-treated material. Glucose yields after the enzymatic hydrolysis of pre-treated material improved from 19.4% to 85.1% when S-0 was increased from 8.53 to 10.42. One of the main reasons for the increase in glucose yield was the redistribution of lignin as micro-particles were deposited on the surface and interior of the fibre cell wall. This information was confirmed by laser scanning confocal fluorescence and FT-IR imaging; these microscopic techniques show changes in the physical and chemical characteristics of pre-treated fibres. In addition, the results allowed the construction of an explanatory model for microscale understanding of the enzymatic accessibility mechanism in the pre-treated lignocellulose.
dc.languageen
dc.publisherMDPI
dc.sourceBIOMOLECULES
dc.subjectsteam explosion
dc.subjectEucalyptus globulus
dc.subjectlignin droplets
dc.subjectenzymatic hydrolysis
dc.subjectFT-IR imaging
dc.subjectchemometric analysis
dc.subject
dc.titleEffects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility
dc.typeArticle


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