A green degumming approach for lignocellulosic kenaf bast using ethanolamine deep eutectic solvent

Song, Yan; Nie, Kai; Ji, Pingping; Sun, Changchun; He, Puliao; Zhang, Shuai; Jiang, Wei; Zhang, Yuanming; Tobimatsu, Yuki; Han, Guangting; Ragauskas, Arthur; Ma, Junzhi

doi:10.1016/j.ijbiomac.2025.143717

A green degumming approach for lignocellulosic kenaf bast using ethanolamine deep eutectic solvent

Journal Article · Wed Apr 30 00:00:00 EDT 2025 · International Journal of Biological Macromolecules

DOI:https://doi.org/10.1016/j.ijbiomac.2025.143717· OSTI ID:3001748

Song, Yan ^[1]; Nie, Kai ^[2]; Ji, Pingping ^[3]; Sun, Changchun ^[4]; He, Puliao ^[4]; Zhang, Shuai ^[4]; Jiang, Wei ^[5]; Zhang, Yuanming ^[5]; Tobimatsu, Yuki ^[3]; Han, Guangting ^[5]; ^[6]; Ma, Junzhi ^[4]

Dezhou University (China); Qingdao University (China)
Qingdao University (China); Kyoto University (Japan)
Kyoto University (Japan)
Dezhou University (China)
Qingdao University (China)
University of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Traditional chemical degumming methods for lignocellulosic bast fibers pose substantial challenges, especially when dealing with kenaf bast, which has a high lignin content. Here, these challenges include severe pollution and low efficiency, etc. Therefore, this study developed a novel, green, and efficient degumming approach for lignocellulosic kenaf bast, leveraging choline chloride-ethanolamine (ChCl-ETA) alkaline deep eutectic solvent (DES). The efficacy of the ChCl-ETA DES based degumming method was validated through comprehensive chemical composition analysis, scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TG), and two-dimensional (2D) nuclear magnetic resonance (NMR) spectroscopy. Subsequently, the optimal degumming conditions, with a choline chloride to ethanolamine ratio of 1:6 and a degumming temperature of 120 °C, were determined based on the results of the residual gum content. Significantly, the recycled ChCl-ETA DES mixtures could maintain a degumming capacity (revealed by the residual gum content of degummed fibers) comparable to that of the conventional double-boiling method for at least five degumming cycles without purification. Given its low-pollution process and high efficiency, this developed method holds great potential for industrial-scale applications of lignocellulosic bast fibers.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 3001748

Journal Information:: International Journal of Biological Macromolecules, Journal Name: International Journal of Biological Macromolecules Vol. 311; ISSN 0141-8130

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

Choline chloride
Deep eutectic solvent
Degumming
Ethanolamine
Kenaf fiber
Lignin

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