Microwave-assisted extraction of high-molecular-weight hemicelluloses from spruce wood |
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| Affiliation: | 1. Sorbonne Université, Université de technologie de Compiègne, Laboratoire “Transformations intégrées de la matière renouvelable” (UTC/ESCOM, EA 4297 TIMR), Centre de recherches Royallieu, CS 60319, 60203 Compiègne cedex, France;3. Université de Lorraine – Faculté des sciences et technologies, Laboratoire d’étude et de recherche sur le matériau bois – EA 4370, boulevard des Aiguillettes, BP 70239, 54506 Vandœuvre-lès-Nancy cedex, France |
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| Abstract: | Microwave-assisted extraction (MAE) at atmospheric pressure has been demonstrated as an efficient technology for the extraction of polymeric hemicelluloses from spruce sawdust. This technology was shown to be more efficient than conventional extraction. MAE leads to a high solubilization of wood and a selective extraction of hemicellulose polymers with high molecular weights. To optimize MAE, different treatment powers (125–573 W) of presoaked spruce sawdust in water and 1 M sodium hydroxide solution for a period of 60 min were tested. The yield of hemicellulose extraction increased with the microwave power in both mediums, but with a clear advantage for presoaked samples in basic medium. The characterization of extracted hemicelluloses has shown high extraction selectivity depending on the medium of impregnation of sawdust before MAE: High-molecular-mass acetylated galactoglucomannans (Mw ∼ 41 kDa) were isolated after presoaking in water and higher molecular mass arabinoglucoronoxylans (Mw ∼ 66 kDa) in basic medium. |
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| Keywords: | Wood Spruce Microwave-assisted extraction Hemicelluloses Polymers Bois Épicéa Extraction assistée par micro-ondes Hémicelluloses Polymères Ac-GGM" },{" #name" :" keyword" ," $" :{" id" :" kwrd0065" }," $$" :[{" #name" :" text" ," _" :" Acetyl-Galactoglucomannan ARX" },{" #name" :" keyword" ," $" :{" id" :" kwrd0075" }," $$" :[{" #name" :" text" ," _" :" Arabinoglucoronoxylan DW" },{" #name" :" keyword" ," $" :{" id" :" kwrd0085" }," $$" :[{" #name" :" text" ," _" :" Dry wood kDa" },{" #name" :" keyword" ," $" :{" id" :" kwrd0095" }," $$" :[{" #name" :" text" ," _" :" kilo Dalton FTIR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0105" }," $$" :[{" #name" :" text" ," _" :" Fourier Transform InfraRed GGM" },{" #name" :" keyword" ," $" :{" id" :" kwrd0115" }," $$" :[{" #name" :" text" ," _" :" Galactoglucomannans HMF" },{" #name" :" keyword" ," $" :{" id" :" kwrd0125" }," $$" :[{" #name" :" text" ," _" :" Hydroxymethylfurfural HPLC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0135" }," $$" :[{" #name" :" text" ," _" :" High-performance liquid chromatography M" },{" #name" :" keyword" ," $" :{" id" :" kwrd0145" }," $$" :[{" #name" :" text" ," _" :" Mole MAE" },{" #name" :" keyword" ," $" :{" id" :" kwrd0155" }," $$" :[{" #name" :" text" ," _" :" Microwave-Assisted Extraction Molecular weight average NREL/TP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0175" }," $$" :[{" #name" :" text" ," _" :" National Renewable Energy Laboratory/ Technical Report PD" },{" #name" :" keyword" ," $" :{" id" :" kwrd0185" }," $$" :[{" #name" :" text" ," _" :" Polymerization degree W" },{" #name" :" keyword" ," $" :{" id" :" kwrd0195" }," $$" :[{" #name" :" text" ," _" :" Watts PDI" },{" #name" :" keyword" ," $" :{" id" :" kwrd0205" }," $$" :[{" #name" :" text" ," _" :" Polydispersity index |
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