Chadni Morad, Grimi Nabil, Ziegler-Devin Isabelle, Brosse Nicolas, Bals Olivier
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.
Sorbonne University, Université de technologie de Compiègne, ESCOM, EA 4297 TIMR, Centre de recherche Royallieu, CS 60 319, 60 203, Compiègne cedex, France.
Carbohydr Polym. 2019 Oct 15;222:115019. doi: 10.1016/j.carbpol.2019.115019. Epub 2019 Jun 21.
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.
这项工作的目的是使用高压放电（HVED）预处理从云杉锯末中提取半纤维素聚合物。进行HVED预处理是为了改善木材基质的解构，并使高分子量半纤维素更容易释放。结果揭示了HVED活化步骤在提取过程中的优势。半纤维素提取率随HVED处理时间的增加而提高。事实上，在1M NaOH溶液中进行4毫秒的HVED处理后，与未处理样品相比，得到的提取率更高（分别为19毫克/克干物质和15.8毫克/克干物质）。提取的半纤维素的分子量非常高（在1M NaOH溶液和水中分别进行4毫秒的HVED处理后，分子量分别为55 kDa和47 kDa）。使用不同的提取介质并结合HVED预处理已揭示了云杉半纤维素的选择性溶解。
