Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7782843 | Carbohydrate Polymers | 2018 | 8 Pages |
Abstract
Steam explosion (150-200â¯Â°C, 5-30â¯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 150â¯Â°C samples, but 200â¯Â°C 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. Freezing dramatically decreased enzymatic accessibility of pretreated samples down to 15.8%.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Ana Lorenzo-Hernando, Judit MartÃn-Juárez, Silvia Bolado-RodrÃguez,