A1 Journal article (refereed)
Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes (2019)
Willberg-Keyriläinen, P., Ropponen, J., Lahtinen, M., & Pere, J. (2019). Improved Reactivity and Derivatization of Cellulose after Pre-Hydrolysis with Commercial Enzymes. BioResources, 14(1), 561-574. https://doi.org/10.15376/biores.14.1.561-574
JYU authors or editors
Publication details
All authors or editors: Willberg-Keyriläinen, Pia; Ropponen, Jarmo; Lahtinen, Manu; Pere, Jaakko
Journal or series: BioResources
ISSN: 1930-2126
eISSN: 1930-2126
Publication year: 2019
Volume: 14
Issue number: 1
Pages range: 561-574
Publisher: North Carolina State University
Publication country: United States
Publication language: English
DOI: https://doi.org/10.15376/biores.14.1.561-574
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/60863
Abstract
Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment method on crystallinity and monosaccharide composition of the resulting pulps were investigated. Both enzymatically treated and ozone-treated pulps were esterified using homogeneous and heterogeneous methods, and the degrees of substitution for these treated pulps were much higher than the esters when the untreated pulp was used. Cellulose esters from the pretreated pulps formed films with good mechanical properties by solvent casting.
Keywords: cellulose; enzymes; ozonisation; esters
Free keywords: enzymatic treatment; ozone treatment; cellulose esters
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2019
JUFO rating: 1
