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Title: Study of steam explosion pretreatment and preservation methods of commercial cellulose
Authors: Lorenzo Hernando, Ana
Martin Juarez, Judit
Bolado Rodríguez, Silvia
Issue Date: 2018
Publisher: Elsevier
Citation: Carbohydrate Polymers Volume 191, 1, Pages 234–241
Abstract: Steam explosion (150 – 200 ºC, 5 – 30 min) was performed on a commercial cellulose presented in two configurations (fiberized and compact sheet) and its effect on their chemical and physical properties was studied, along with the influence of two different preservation methods (acetone drying and freezing) after pretreatment. No degradation compounds were produced during pretreatment, although solid recovery (RS) decreased with temperature from 90% to 62%. Similar particle size and surface conditions (increased porosity) were found for both types of pretreated samples despite the extremely different initial configuration. Crystallinity diminished for 150 ºC samples, but 200 ºC pretreatment promoted recrystallization. Pretreatment also reduced polymerization degree, although enzymatic accessibility did not improve. Both acetone and freezing processes extremely affected cellulose properties. Acetone drying counterbalanced crystallinity and enzymatic accessibility variations of pretreated samples, while decreasing polymerization degree to 302. Freezing dramatically decreased enzymatic accessibility of pretreated samples down to 15.8%.
Classification: Natural fiber
enzymatic hydrolysis
degree of polymerization
acetone drying
Peer Review: SI
DOI: 10.1016/j.carbpol.2018.03.021
Sponsor: UIC-Consejería de Educación Junta de Castilla y León, University of Valladolid
Language: eng
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:GTA - Artículos de revista
DEP48 - Artículos de revista

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