Ultrasonic-assisted water extraction from Eucalyptus globulus leaves and branches, to obtain natural textile dyes with antioxidant properties

• Type: Article in International Scientific Journal
• Date: 2025

Authors

Santos, J (Author) Other; Freitas, B (Author) Other; Fernandes, RA (Author) Other; Escobar-Avello, D (Author) Other; Gomes, T (Author) Other; Magalhaes, P (Author) Other; Magalhaes, FD (Author) Other; Martins, JM (Author) Other; Luísa Carvalho (Author) FEUP

Journal

Title: Industrial Crops and Products

Vol. 228

ISSN: 0926-6690

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-018-F7B

DOI: 10.1016/j.indcrop.2025.120885

Abstract (EN): Forestry is an interesting source of fibres and metabolites with high applicability for the textile industry and one of the main alternatives to reduce its high environmental impact. In recent years, the use of forest raw-materials as sources of dyes and natural fibres for the textile industry has gained interest due to environmental and sustainability concerns. The feasibility of the valorisation of Eucalyptus globulus small branches and leaves (BLE) as a raw material in the production of extracts that allows the production of functional dyed textiles with antioxidant properties was evaluated. The ultrasound-assisted extraction (UAE) in water methodology was used, as it is environmentally friendly, and the impact of the BLE particle size distribution on the phenolic content and antioxidant activity of the extracts was determined. Chemical characterisation of the extracts was performed by LC-ESI-LTQ-Orbitrap-MS and FTIR. The extracts obtained were used to dye and functionalise cotton textile samples, evaluating the effect of using alum as a mordant and NaOH as a pH modifier on the properties of the dyed textile products. It has been shown that it is possible to obtain dyed textile products with interesting colour and light fastness properties only by using BLE extracts as natural textile dyes. Furthermore, the dyed textile products obtained showed interesting antioxidant properties, with the best results obtained when only BLE extracts were used as dyes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14