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Tailored organosolv banana peels lignins: Improved thermal, antioxidant and antimicrobial performances by controlling process parameters.
- Source :
-
International journal of biological macromolecules [Int J Biol Macromol] 2021 Jun 30; Vol. 181, pp. 241-252. Date of Electronic Publication: 2021 Mar 26. - Publication Year :
- 2021
-
Abstract
- There is a growing environmental concern in the world for replacing the traditional petroleum-based products. The aim of this work was to evaluate the structure - property relationship of banana peel lignins (BPLs) as antioxidant and antimicrobial agents by controlling the parameters of organosolv process. The milled banana peel was hydrolyzed using an aqueous acetic acid solution (70, 80 and 90% v/v) and 2.0% v/v HCl at 110 °C for 1, 2 and 3 h. BPLs were characterized by FTIR, <superscript>1</superscript> H NMR, <superscript>1</superscript> H <superscript>13</superscript> C HSQC, <superscript>31</superscript> P NMR, GPC and TGA. The antioxidant capacity of BPLs was evaluated by DPPH, ABTS and H <subscript>2</subscript> O <subscript>2</subscript> assays, comparing their performance with that of ascorbic and gallic acid. The antimicrobial activity of BPLs was evaluated against E. coli. The reaction time and acetic acid/water ratio had significant effects on the yield and purity of BPLs. The composition of organosolv solution also affected their total amount of hydroxyls (0.71-0.82 mmol g <superscript>-1</superscript> ), M <subscript>w</subscript> (2759-3954 g mol <superscript>-1</superscript> ), T <subscript>onset</subscript> (232-254 °C), antioxidant and antimicrobial activities. It can be concluded that the control of organosolv parameters can be a useful tool for tuning the structural features of lignins and to maximize their performance.<br /> (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Subjects :
- Bacteria drug effects
Benzothiazoles chemistry
Biphenyl Compounds chemistry
Fungi drug effects
Hydrogen Peroxide chemistry
Inhibitory Concentration 50
Lignin chemistry
Magnetic Resonance Spectroscopy
Microbial Sensitivity Tests
Molecular Weight
Picrates chemistry
Solutions
Spectroscopy, Fourier Transform Infrared
Sulfonic Acids chemistry
Thermogravimetry
Anti-Infective Agents pharmacology
Antioxidants pharmacology
Lignin pharmacology
Musa chemistry
Solvents chemistry
Temperature
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0003
- Volume :
- 181
- Database :
- MEDLINE
- Journal :
- International journal of biological macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 33781810
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2021.03.156