The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Enhancing the solubility and antioxidant activity of high-molecular-weight lignin by moderate depolymerization via in situ ethanol/acid catalysis
Abstract
Abstract Lignin, a by-product obtained from the pulping industry and cellulosic ethanol production, has received considerable attention for its antioxidant activity owing to its polyphenol structure. In this work, high-molecular-weight lignin obtained by ethanol-water fractionation of enzymatic hydrolysis lignin, was moderately depolymerized via in situ ethanol/acid catalysis to improve its solubility and antioxidant activity. The depolymerized products showed significant reduction in molecular weight and improvement in solubility in an 80% ethanol-water (v/v) solution owing to the cleavage of ether linkages; this was confirmed by gel permeation chromatography (GPC), fourier transform-infrared spectroscopy (FT-IR), pyrolysis-gas chromatography/ mass spectrometer (Py-GC/MS), carbon-13 nuclear magnetic resonance spectrometry (13C NMR), and heteronculear single quantum coherence nuclear magnetic resonance spectrometry (HSQC NMR) analyses. In addition, the total phenolics content of the depolymerized products increased sharply, leading to a significant enhancement in the free radical scavenging capacity of 1,1-diphenyl-2-picrylhydrazyl (DPPH). In particular, D-200 (depolymerized product at 200 °C) with IC50 = 66.0 ± 2.6 μg/mL was comparable to the positive control butylated hydroxytoluene (BHT) with IC50 = 53.3 ± 4.5 μg/mL, indicating the potential application of lignin as a high-value-added antioxidant. In conclusion, the depolymerization of high-molecular-weight lignin via moderate ethanol/acid catalysis may effectively improve its solubility and antioxidant activity.
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Citations
Cites
Catalytic Transformation of Lignin for the Production of Chemicals and Fuels
Li, C., Zhao, X., Wang, A., Huber, G. W., & Zhang, T. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00155 · Cited by 2,951
Chemical modification of lignins: Towards biobased polymers
Laurichesse, S., & Avérous, L. (2014) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2013.11.004 · Cited by 2,058
Rashid, T., Gnanasundaram, N., Appusamy, A., Kait, C. F., & Thanabalan, M. (2018) · Industrial Crops and Products · doi:10.1016/j.indcrop.2018.02.056 · Cited by 95
Cited by
Rumpf, J., Burger, R., & Schulze, M. (2023) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2023.123470 · Cited by 830
Biomass Fractionation and Lignin Fractionation towards Lignin Valorization
Xu, J., Li, C., Dai, L., Xu, C., Zhong, Y., Yu, F., & Si, C. (2020) · ChemSusChem · doi:10.1002/cssc.202001491 · Cited by 317
Self-citationUsing green γ-valerolactone/water solvent to decrease lignin heterogeneity by gradient precipitation
Wang, G., Liu, X., Yang, B., Si, C., Parvez, A. M., Jang, J., & Ni, Y. (2019) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.9b01641 · Cited by 111
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Metadata
- Authors
- An, L., Si, C., Wang, G., Sui, W., & Tao, Z.
- Venue
- Industrial Crops and Products
- Publisher
- Elsevier BV
- Published
- 2019-02
- Volume
- 128
- Pages
- 177-185
- ISSN
- 0926-6690 (ISSN-L)
- OpenAlex
- W2900611521
- Cited by
- 170
- References
- 3
- FWCI
- 6.42
- Type
- journal article
- Language
- en
- Open access
- closed
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- An, L., Si, C., Wang, G., Sui, W., & Tao, Z. (2019). Enhancing the solubility and antioxidant activity of high-molecular-weight lignin by moderate depolymerization via in situ ethanol/acid catalysis. Industrial Crops and Products. https://doi.org/10.1016/j.indcrop.2018.11.009
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