期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 210, 期 -, 页码 716-741出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.04.228
关键词
Lignin antioxidants; Antioxidant activity; Applications
资金
- National Natural Science Foundation of China [21774059]
- China Scholarship Council (CSC) [202108320294]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas) [2019-00904]
- Swedish Research Council [2019-04941]
- Formas [2019-00904] Funding Source: Formas
- Swedish Research Council [2019-04941] Funding Source: Swedish Research Council
This review summarizes the research progress on lignin antioxidants extracted from biomass resources, methods to improve their antioxidant activity, and their applications. Phenolic content is considered as the most important factor affecting lignin antioxidant activity, and studies have focused on pretreatments and post-processing methods to enhance their activity. Lignin is regarded as a potential natural antioxidant alternative and has the potential for application as an inexpensive antioxidant additive.
Lignin, a biopolymer obtained from agricultural/forestry residues or paper pulping wastewater, is rich in aromatic structure, which is central to its adoption as a candidate to natural antioxidants. Through insight into its structural features from biomass, different functional groups would influence lignin antioxidant activity, wherein phenolic content is the most important factor, hence massive studies have focused on its improvement via different pretreatments and post-processing methods. Besides, lignin nanoparticles and chemical modifications are also efficient methods to improve antioxidant activity via increasing free content and decreasing bond dissociation enthalpy of phenolic hydroxyl. Lignin samples exhibit comparable radicals scavenging ability to commercial ones, showing their potential as renewable alternatives of synthesized antioxidants. Besides, their applications have also been discussed, which demonstrates lignin potential as an inexpensive antioxidant additive and consequent improvements on multiple functionalities. This review is dedicated to summarize lignin antioxidants extracted from biomass resources, methods to improve their antioxidant activity and their applications, which is beneficial for realizing lignin valorization.
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