Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Sugarcane Light-Colored Lignin: A Renewable Resource for Sustainable Beauty

Inês F. Mota
ORCID logo ,
Filipa Antunes
,
Joana F. Fangueiro
,
Carina A.E. Costa
,
Alírio E. Rodrigues
ORCID logo ,
Manuela Pintado
ORCID logo ,
Patrícia S. Costa
*
Version 1 : Received: 12 October 2023 / Approved: 13 October 2023 / Online: 13 October 2023 (07:57:18 CEST)

A peer-reviewed article of this Preprint also exists.

Mota, I.F.; Antunes, F.; Fangueiro, J.F.; Costa, C.A.E.; Rodrigues, A.E.; Pintado, M.E.; Costa, P.S. Sugarcane Light-Colored Lignin: A Renewable Resource for Sustainable Beauty. Int. J. Mol. Sci. 2023, 24, 15941. Mota, I.F.; Antunes, F.; Fangueiro, J.F.; Costa, C.A.E.; Rodrigues, A.E.; Pintado, M.E.; Costa, P.S. Sugarcane Light-Colored Lignin: A Renewable Resource for Sustainable Beauty. Int. J. Mol. Sci. 2023, 24, 15941.

Abstract

Lignin has emerged as a promising eco-friendly multifunctional ingredient for cosmetic applications, due to its ability to protect against ultraviolet radiation, antioxidant, and antimicrobial properties. However, its typical dark color and low water solubility limit its application in cosmetics. This study presents a simple process for obtaining light-colored lignin (LCLig) from alkaline black liquor of sugarcane bagasse (SCB), involving an oxidation treatment with hydrogen peroxide, followed by precipitation with sulfuric acid. The physico-chemical characterization, antioxidant and emulsifying potential, safety and stability in an oil-in-water emulsion were performed. A high-purity lignin (81.6%) with improved water solubility was obtained, as result of the balance between the total aromatic phenolic units and the carboxylic acids. In addition, the antioxidant and emulsifying capacities of the LCLig were demonstrated. The color reduction treatment did not compromise the safety of lignin for topical cosmetic applications. The emulsion was stable in terms of organoleptic properties (color, pH, and viscosity) and antioxidant activity, over 3 months at 4, 25 and 40°C.

Keywords

light-colored lignin; cosmetics; sugarcane bagasse

Subject

Engineering, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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