A Comparison of Alkaline and Organosolv Lignin Extraction Methods from Coconut Husks as an Alternative Material for Green Applications
| Autor: | Nur Hanis Abd Latif, Nicolas Brosse, Isabelle Ziegler-Devin, Laurent Chrusiel, Rokiah Hashim, M. Hazwan Hussin |
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| Přispěvatelé: | Universiti Sains Malaysia (USM), Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL), ANR-12-LABX-0001,ARBRE |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Organosolv lignin
Environmental Engineering [CHIM.ORGA]Chemical Sciences/Organic chemistry Alkaline lignin technology industry and agriculture food and beverages Bioengineering macromolecular substances complex mixtures 6. Clean water [SPI.MAT]Engineering Sciences [physics]/Materials [CHIM.POLY]Chemical Sciences/Polymers Coconut husk [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Waste Management and Disposal |
| Zdroj: | Bioresources Bioresources, North Carolina State University, 2021, 17 (1), pp.469-491. ⟨10.15376/biores.17.1.469-491⟩ |
| ISSN: | 1930-2126 |
| Popis: | International audience; Effects of alkaline (kraft and soda) and organosolv pulping were evaluated relative to the structural properties of lignin isolated from coconut husk (CH) biomass. The various types of functional groups within the isolated lignin samples were characterized and compared using a variety of complementary analyses including Fourier-transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography (GPC), and high-performance liquid chromatography (HPLC). All isolated CH lignin samples contained a significant quantity of non-condensed guaiacyl-type (G) and syringyl-type (S) units but a lesser amount of p-hydroxyphenyl (H) units, as demonstrated and supported by previous research. The alkaline CH lignin produced lignin with higher molecular weight (Mw SL: 959 g mol-1 > Mw KL: 769 g mol-1) than the organosolv lignin (Mw OL: 606 g mol-1) sample, resulting in smaller fragments and a higher degree of solubility in water or other solvents. Because of significant differences in the physicochemical characteristics of the various lignin polymers, their properties and structure were improved with respect to alternative approaches in lignin-based applications. |
| Databáze: | OpenAIRE |
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