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COST Action FP1105: effect of raw materials and pulping conditions on the characteristics of dissolved kraft lignins by Antonia Svärd; Olena Sevastyanova; Galina Dobele; Vilhemina Jurkjane; Elisabet Brännvall is a Engineering article available to read on EtoBox.
What is COST Action FP1105: effect of raw materials and pulping conditions on the characteristics of dissolved kraft lignins about?
## Abstract The composition, molecular weight (MW), and chemical structure of technical lignins as byproducts of pulping influence their application in terms of physical and chemical properties, reactivity, and performance. It is important to know how the analytical data of technical lignins are influenced by the wood species and the parameters of pulping. The present study focuses on kraft pulping and how the wood species (eucalyptus, pine, and spruce) and variable cooking times influence the characteristics of dissolved lignins. The black liquor (BL) was recovered after three different cooking times and the precipitated lignin was characterized by total acid hydrolysis including the determination of the acid insoluble part (Klason lignin, KL) and the sugars in the hydrolysate, elemental analysis, ^31^P NMR spectroscopy, analytical pyrolysis (Py-GC/MS), gel permeation chromatography (GPC), thermogravimetry (TG), and differential scanning calorimetry (DSC). The results indicate that the phenolic OH content, MW and glass transition temperature increased with longer cooking times for the softwood (SW) lignins. These lignins had also a higher MW (M~w~ 5500–8000 g mol^-1^), than the eu
Who reads COST Action FP1105: effect of raw materials and pulping conditions on the characteristics of dissolved kraft lignins?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Antonia Svärd; Olena Sevastyanova; Galina Dobele; Vilhemina Jurkjane; Elisabet Brännvall
- Publisher
- Walter de Gruyter GmbH
- Published
- 2016
- Language
- EN
- Field
- Engineering (Physical Sciences)