High voltage electric discharges treatment for high molecular weight hemicelluloses extraction from spruce

Morad Chadni; Nabil Grimi; Isabelle Ziegler-Devin; Nicolas Brosse; Olivier Bals

doi:10.1016/j.carbpol.2019.115019

High voltage electric discharges treatment for high molecular weight hemicelluloses extraction from spruce

Carbohydr Polym. 2019 Oct 15:222:115019. doi: 10.1016/j.carbpol.2019.115019. Epub 2019 Jun 21.

Authors

Morad Chadni¹, Nabil Grimi², Isabelle Ziegler-Devin³, Nicolas Brosse³, Olivier Bals⁴

Affiliations

¹ Sorbonne University, Université de technologie de Compiègne, ESCOM, EA 4297 TIMR, Centre de recherche Royallieu, CS 60 319, 60 203, Compiègne cedex, France; Sofren Groupe, 1 rue Royale, 92210, Saint-Cloud, France. Electronic address: morad.chadni@utc.fr.
² Sorbonne University, Université de technologie de Compiègne, ESCOM, EA 4297 TIMR, Centre de recherche Royallieu, CS 60 319, 60 203, Compiègne cedex, France. Electronic address: nabil.grimi@utc.fr.
³ Université de Lorraine, Faculté des Sciences et Techniques, Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Bld des Aiguillettes, F-54500, Vandoeuvre-les-Nancy, France.
⁴ Sorbonne University, Université de technologie de Compiègne, ESCOM, EA 4297 TIMR, Centre de recherche Royallieu, CS 60 319, 60 203, Compiègne cedex, France.

PMID: 31320084
DOI: 10.1016/j.carbpol.2019.115019

Abstract

The aim of this work is to extract hemicelluloses polymers from spruce sawdust using High Voltage Electrical Discharges (HVED) pretreatment. HVED pretreatment was carried out in order to improve deconstruction of the wood matrix and to allow easier release of high molecular mass hemicelluloses. The results revealed the advantage of HVED activation step in the process of extraction. The yield of hemicellulose extraction increased with HVED treatment time. In fact, after 4 ms of HVED treatment time in 1 M NaOH solution, the yield obtained was higher as compared to the untreated sample (19 mg/g of dry matter and 15.8 mg/g of dry matter respectively). The molecular weights of extracted hemicelluloses are very high (55 kDa and 47 kDa for 4 ms of HVED-treatment in 1 M NaOH solution and water respectively). The use of different mediums of extraction with HVED pretreatment have revealed a selective solubilization of spruce hemicelluloses.

Keywords: Extraction; Hemicelluloses; High voltage electric discharges; Polymers; Spruce.