Pretreatment of willow using the alkaline-catalyzed sulfolane/water solution for high-purity and antioxidative lignin production
| Autor: | Xingxiang Ji, Jiachuan Chen, Jianzhen Mao, Gaojin Lyu, Feng Xu, Weikun Jiang, Lei Zhong, Chao Wang, Chang Geun Yoo, Miaomiao Xu, Guihua Yang, Lupeng Shao |
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| Rok vydání: | 2020 |
| Předmět: |
Magnetic Resonance Spectroscopy
Organosolv Carbohydrates Thiophenes macromolecular substances 02 engineering and technology Lignin complex mixtures Biochemistry Antioxidants Catalysis 03 medical and health sciences chemistry.chemical_compound Polysaccharides Structural Biology Spectroscopy Fourier Transform Infrared Molecular Biology 030304 developmental biology 0303 health sciences Salix matsudana biology Hydrolysis fungi Extraction (chemistry) technology industry and agriculture Water food and beverages General Medicine 021001 nanoscience & nanotechnology Biorefinery biology.organism_classification Molecular Weight Solutions chemistry Yield (chemistry) Solvents Antacids Sulfolane 0210 nano-technology Nuclear chemistry |
| Zdroj: | International Journal of Biological Macromolecules. 159:287-294 |
| ISSN: | 0141-8130 |
| DOI: | 10.1016/j.ijbiomac.2020.05.074 |
| Popis: | In this study, an alkaline-catalyzed sulfolane/water solvent system was developed for isolating high-purity and antioxidative lignin from willow (Salix matsudana cv. Zhuliu). Optimization of the pretreatment conditions such as temperature, sulfolane/water ratio, and alkaline catalyst (NaOH) dosage were comprehensively investigated for effective lignin extraction from willow. The 44.4% of lignin was recovered from the biomass with 54% of delignification in 50/50 (w/w) sulfolane/water system at 170 °C. As the addition of the alkaline catalyst (NaOH) increased to 4%, the delignification yield was increased up to 94% with about 70% of lignin recovery yield. The recovered lignin was comparatively investigated with its control, milled wood lignin (MWL). The β-O-4 linkages and phenolic hydroxyl were well preserved in the extracted lignin fractions with the sulfolane/water system. Furthermore, excellent radical scavenging ability was observed with the extracted lignins by sulfolane/water pretreatments owing to rich phenolic hydroxyl groups in the lignins. Hence, systematical investigation on the lignin properties and potential applications under sulfolane organosolv pretreatment would promote the utilization of lignin in biorefinery processes. |
| Databáze: | OpenAIRE |
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