ESTUDO DA EXTRAÇÃO DE CORANTE NATURAL QUE CONFERE PROTEÇÃO ULTRAVIOLETA EM FIBRAS NATURAIS

Adriana Célia Lucarini; Alex Sthefan Franco Zelada Tabu; Felipe de Freitas Roque da Silva; Gabriela de Andrade Moraes; Gabriela Iervolino Piazon; Mariana Pimenta Zurawski

doi:10.18540/jcecvl3iss2pp082-094

Authors

Adriana Célia Lucarini FEI University
Alex Sthefan Franco Zelada Tabu FEI University
Felipe de Freitas Roque da Silva FEI University
Gabriela de Andrade Moraes FEI University
Gabriela Iervolino Piazon FEI University
Mariana Pimenta Zurawski FEI University

DOI:

https://doi.org/10.18540/jcecvl3iss2pp082-094

Keywords:

Natural Dye, Extraction, UV Protection, Bixin, Norbixin

Abstract

It was studied parameters that influence the solid-liquid extraction of natural dye from annatto and the ultraviolet protection (UV) conferred by its application in a natural fiber. Annato is one of the natural dyes most used worldwide and its main pigment is the carotenoid bixin, which is converted by alkaline hydrolysis into norbixin. Different organic solvents and alkaline solutions were studied for extraction: acetone, ethyl acetate, KOH in solution and ethanol. It was analyzed the effect of the parameters: temperature, solid particle size, extraction time and solid/solvent mass ratio. The results obtained revealed that an ideal extraction was verified using ethanol:acetone 50% (v/v), 55ºC and particle size of 100 MESH. It was observed that the solvent saturated in 20 minutes of extraction, meaning that the solid can be used for more than one extraction cycle. The dye conferred an ultraviolet protection in bleached cotton of about 89% of the absorbed ultraviolet radiation