Synthesis and Characterization of Transparent Biodegradable Chitosan: Exopolysaccharide Composite Films Plasticized by Bio-Derived 1,3-Propanediol
| Autor: | Nishant Gopalan, Parameswaran Binod, Satyajit Das, Kesavan Madhavan Nampoothiri, Narisetty Vivek, Keerthi Sasikumar, Ashok Pandey, Raveendran Sindhu |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Aqueous solution Materials science 010405 organic chemistry exopolysaccharides Composite number Plasticizer 02 engineering and technology plasticizer 021001 nanoscience & nanotechnology composites 01 natural sciences 0104 chemical sciences Chitosan Solvent chemistry.chemical_compound chemistry Chemical engineering Ultimate tensile strength chitosan Fourier transform infrared spectroscopy 0210 nano-technology 1 3-propanediol |
| Zdroj: | Sustainable Chemistry Volume 2 Issue 1 Pages 4-62 |
| ISSN: | 2673-4079 |
| Popis: | In this study, chitosan-based composite films blended with a dextran like exopolysaccharide derived from lactic acid bacteria were prepared using the solvent casting method. Later, these composite films were plasticized with 1,3-propanediol (1,3-PDO) produced biologically using biodiesel derived crude glycerol. Further, their physical properties, such as tensile strength, water vapor barrier, thermal behavior, and antioxidant properties, were tested. In comparison to the control chitosan-exopolysaccharide films, 1,3-PDO plasticized films increased tensile strengths (20.08 vs. 43.33 MPa) with an elongation percentage (%E) of 20.73, which was two times more than the control films. As a polymer composite, the Fourier transform infrared (FTIR) spectrum displayed the characteristic peaks at 1000 cm−1, 1500 cm−1, and 3000–3500 cm−1 to describe the functional groups related to chitosan, exopolysaccharide, and 1,3-PDOThe thermogravimetric analysis displayed a significant three-step degradation at 100–105 °C, 250–400 °C, and 600 °C, where 100% of the films were degraded. The plasticized films were observed to have enhanced water solubility (51%) and rate of moisture absorption (193%). The plasticized films displayed enhanced physico-chemical properties, anti-oxidant properties, and were100% biodegradable. |
| Databáze: | OpenAIRE |
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