A sustainable solvent based on lactic acid and l -cysteine for the regeneration of keratin from waste wool
| Autor: | Hafez Jafari, Nelson De Laet, Parinaz Hobbi, Lei Nie, Erika Zago, Amin Shavandi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
animal structures
02 engineering and technology 010402 general chemistry 01 natural sciences Environnement et pollution chemistry.chemical_compound Keratin Environmental Chemistry Dissolution Sodium sulfite chemistry.chemical_classification integumentary system food and beverages Sciences bio-médicales et agricoles 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences Deep eutectic solvent Lactic acid Technologie de l'environnement contrôle de la pollution chemistry Wool Sodium hydroxide Urea 0210 nano-technology Nuclear chemistry |
| Zdroj: | Green chemistry Green chemistry, 23 (3 |
| ISSN: | 1463-9270 1463-9262 |
| DOI: | 10.1039/d0gc04314a |
| Popis: | Keratin dissolution is the first step toward reusing protein-rich biomass such as waste wool, hair, and feather. This paper reports an efficient and environmentally friendly method for the complete recycling of waste wool using a mixture of lactic acid andl-cysteine as a new green deep eutectic solvent (DES) for isolation of keratin. The dissolution time for a 90% dissolubility was 3.5 hours at 95 °C where 22 mg of wool was dissolved per 1 g of the DES. Keratin was obtained after dialysis of the DES mixture followed by lyophilization. In comparison with the raw wool, the α-helix content of keratin decreased while its β content increased. The keratin isolation with the proposed DES only requires water,l-cysteine, and lactic acid and does not require conventional chemicals such as urea, sodium sulfite, and sodium hydroxide. SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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