Fungicidal Potential of Polymeric Hydrogels Based on Carboxymethylcellulose and Yerba Mate Residues with the Incorporation of Garlic Oil

Fungicidal Potential of Polymeric Hydrogels Based on Carboxymethylcellulose and Yerba Mate Residues with the Incorporation of Garlic Oil

In the present study, hydrogels are developed from carboxymethylcellulose, with the addition of cellulose nanofibers (CNFs) obtained from yerba mate stick residues and garlic oil. CNFs are obtained via physical (steam explosion), chemical (bleaching), and mechanical (ultrafine friction milling) proc...

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Bibliographic Details
Published in:Starch Vol. 75; no. 3-4
Main Authors: Frühauf, Gabriela Oliveira, Beltrami, Lilian Vanessa Rossa, Francisquetti, Edson Luiz, Granada, Camille Eichelberger, Zattera, Ademir José, Catto, André Luis, Borsoi, Cleide
Format: Journal Article
Language:English
Published: Weinheim Wiley Subscription Services, Inc 01-03-2023
Subjects:
Alginic acid
Antifungal activity
Bleaching
Carboxymethylcellulose
Cellulose
Cellulose fibers
cellulose nanofibers
Citric acid
composites
Encapsulation
Fourier transforms
Fungicides
Fusarium
Garlic
garlic oil
Hydrogels
Infrared analysis
Infrared spectroscopy
Nanofibers
Residues
Scanning electron microscopy
Sodium
Sodium alginate
Spectrum analysis
Steam explosions
Swelling
Thermal degradation
Thermogravimetric analysis
Ultrafines
Water absorption
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Summary:In the present study, hydrogels are developed from carboxymethylcellulose, with the addition of cellulose nanofibers (CNFs) obtained from yerba mate stick residues and garlic oil. CNFs are obtained via physical (steam explosion), chemical (bleaching), and mechanical (ultrafine friction milling) processes. Garlic oil is encapsulated into sodium alginate for the evaluation of fungicidal potential. The samples are assessed for characteristics such as water absorption capacity (swelling) and inhibitory activity against Fusarium sp. FUS147 in vitro by Fourier‐transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). TGA and FTIR spectra confirm the cross‐linking mechanism for citric acid in sodium carboxymethylcellulose (CMC) in the hydrogel formation. The incorporation of CNFs, sodium alginate, and garlic oil reduces the temperature at the beginning of thermal degradation, to 47, 38, and 31 °C, respectively, in relation to a hydrogel sample with only carboxymethylcellulose (HC). The swelling analysis reveals an increase of 57% for a sample with CNF, and 42% for a sample with incorporation of garlic oil encapsulated in alginate, in relation to the HC sample. The sample with encapsulated garlic oil shows a high degree of swelling with broad antifungal activity against the Fusarium sp. FUS147, showing great potential for use in agriculture. This work proposes the use of cellulose nanofibers extracted from yerba mate residues in carbomethylcellulose hydrogels, along with sodium alginate capsules containing garlic oil. The addition of sodium alginate capsules containing garlic oil confers broad fungicidal activity to the hydrogel, indicating its potential application in agriculture.
ISSN:0038-9056
1521-379X
DOI:10.1002/star.202200182