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Development of Water Repellent, Non-Friable Tannin-Furanic-Fatty Acids Biofoams
Elham Azadeh1, Ummi Hani Abdullah2,3, Nurul Basirah Md Ali2
1Faculty of Science and Technology, LERMAB, University of Lorraine, Bd. des Aiguillettes, BP 70239, 54506 Vandoeuvre Les Nancy, France.
Polymers
|November 26, 2022
Summary
New tannin-furanic foams exhibit reduced friability and enhanced water repellence. Esterification of tannin extracts with fatty acids improves foam properties for advanced material applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Chemistry
Background:
- Tannin-based foams are explored as sustainable alternatives to synthetic foams.
- Improving the mechanical properties and water resistance of tannin foams is crucial for broader applications.
Purpose of the Study:
- To synthesize novel tannin-furanic foams with enhanced properties.
- To investigate the effect of fatty acid esterification on tannin structure and foam performance.
Main Methods:
- Polyflavonoid tannin extract was esterified with palmitic, oleic, or lauric acid.
- Fourier-transform infrared (FTIR) spectroscopy confirmed esterification.
- Matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry identified oligomers.
- Foam properties including friability, density, and water repellence (wetting angle, surface energy) were evaluated.
Main Results:
- Esterified tannin extracts yielded tannin-furanic foams with good efficiency.
- The synthesized foams showed significantly reduced or no surface friability.
- Foams exhibited improved water repellence, demonstrated by high and stable wetting angles.
- Lower densities compared to standard foams were achieved.
Conclusions:
- Fatty acid esterification effectively modifies tannin structure for improved foam properties.
- The developed tannin-furanic foams offer enhanced mechanical stability and water resistance.
- These findings suggest potential for these novel foams in applications requiring durable and water-repellent materials.
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