Structural analysis of open-column fractionation of peracetic acid-treated kraft lignin
Journal of the Korean Wood Science and Technology, ISSN: 2233-7180, Vol: 48, Issue: 6, Page: 769-779
2020
- 7Citations
- 2Captures
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Article Description
This study investigates the selective fractionation of lignin with uniform structures and lower molecular weight. Lignin solubilization was first performed using a solution of acetic acid (AA) and hydrogen peroxide (HP) (4:1, (v/v)) to form peracetic acid (PAA), which is a strong oxidant. After the PAA-induced solubilization that occurred at 80°C, totally soluble lignin was extracted by ethyl acetate (EA) and divided into organic-and water-soluble fractions. The EA fraction was then fractionated by open-column using three solutions (chloroform-ethyl acetate, methanol, and water) sequentially. With an increase in the solvent polarity during the fractionation step, the molecular weight of the lignin-derived compounds in the fraction increased. Remarkably, some lignin fractions did not have aromatic structures. These fractions were identified as carboxylic acid-containing polymers like poly-carboxylates. These results conclude that the selective production of lignin-derived polymers with specific molecular weight and structural characteristics could be possible through open-column fractionation.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85097561639&origin=inward; http://dx.doi.org/10.5658/wood.2020.48.6.769; http://www.woodj.org/archive/view_article?doi=10.5658/WOOD.2020.48.6.769; https://dx.doi.org/10.5658/wood.2020.48.6.769; https://www.woodj.org/archive/view_article?pid=wood-48-6-769
The Korean Society of Wood Science Technology
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