Recyclability of tannin-furanic foams

•Tannin-Furanic foams can be ground to powder and used as additive for new foams.•Replacing up to 10% of tannin with recycled material, does not decrease strength.•More than 25% replacement is not possible, as the foaming is disturbed.•Leaching shows, that the recycled material is incorporated in th...

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Bibliographic Details
Published in:Materials letters 2023-08, Vol.345, p.134483, Article 134483
Main Authors: Sepperer, Thomas, Cătălin Barbu, Marius, Mariana Tudor, Eugenia, Fürmann, Sebastian, Petutschnigg, Alexander
Format: Article
Language:English
Subjects:
Biogenic foam
Circular economy
Flavonoid polymer
Polyphenol
Recirculation
Reuse
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Summary:•Tannin-Furanic foams can be ground to powder and used as additive for new foams.•Replacing up to 10% of tannin with recycled material, does not decrease strength.•More than 25% replacement is not possible, as the foaming is disturbed.•Leaching shows, that the recycled material is incorporated in the polymer. Tannin-furanic foams are biogenic, lightweight material comprising of up 95% renewable resources. Replacing 5 to 30% of the tannin powder in the formulation for new foam with finely grinded, recycled tannin-furanic polymer powder was investigated. While 5% and 10% of recycled material did not have a significant influence on the mechanical properties (bending strength, modulus of elasticity, tensile strength and compression resistance) a slight decrease is observed for 15 to 25% replacement, but within these groups, results are not significantly different. An overall decrease of 30% for mechanical properties was observed for foams made with 15% to 25% recycled material. The addition of 30% recycling material in the production of tannin foams is not feasible, as the foaming process is disturbed.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.134483