RT info:eu-repo/semantics/article
T1 Study of steam explosion pretreatment and preservation methods of commercial cellulose
A1 Lorenzo Hernando, Ana María
A1 Martín Juarez, Judit
A1 Bolado Rodríguez, Silvia
K1 Natural fiber
K1 Crystallinity
K1 Enzymatic hydrolysis
K1 Degree of polymerization
K1 Acetone drying
K1 Freezing
AB 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%.
PB Elsevier
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/29163
UL http://uvadoc.uva.es/handle/10324/29163
LA eng
NO Carbohydrate Polymers Volume 191, 1, Pages 234–241
DS UVaDOC
RD 19-sep-2024