Extraction and Characterization of Lignin from Instant Coffee and its Anti-UV Application in Stabilized Pickering Emulsion

In recent years, there has been an increasing demand for environmentally friendly products. In this context, lignin has garnered significant attention as a natural and renewable biomass material. It is suspected that certain instant coffee species contain a certain amount of green and non-toxic edib...

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Bibliographic Details
Published in:Waste and biomass valorization 2024, Vol.15 (6), p.3651-3658
Main Authors: Xin, Hanwen, Xu, Jingyu, Zhou, Jinghui, Wang, Xing
Format: Article
Language:English
Subjects:
Acids
Coffee
Emulsions
Engineering
Environment
Environmental Engineering/Biotechnology
Green products
Industrial Pollution Prevention
Instant coffee
Lignin
Original Paper
Pigskins
Renewable and Green Energy
Sun screens
Ultraviolet radiation
Waste Management/Waste Technology
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Summary:In recent years, there has been an increasing demand for environmentally friendly products. In this context, lignin has garnered significant attention as a natural and renewable biomass material. It is suspected that certain instant coffee species contain a certain amount of green and non-toxic edible lignin due to the similarity between the extraction process of instant coffee and the hydrothermal extraction process of lignin. However, there is currently no research available on these lignin samples. This study aims to fill this gap by extracting and analyzing lignin from five common instant coffee brands. The acid precipitation method was used to extract lignin, and the contents of acid-insoluble and acid-soluble lignin were calculated. Subsequently, the acid-insoluble lignin was structurally characterized, and the samples were tested for their antioxidant, UV protection, and antibacterial properties. The results showed that these coffee lignin exhibited excellent properties. To further apply these excellent properties, they were prepared them into stable Pickering emulsions and tested their UV resistance. The emulsions were successful in maintaining the colour of pigskin even after 4 h of exposure to 254 and 365 nm UV light. This suggests that coffee lignin has potential for use in the development and production of non-toxic, environmentally friendly sunscreen products.
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-023-02404-0