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Abstract: Polyflavenoid tannin-furanic rigid foams have widespread industrial applications. The chemical and physical properties of the five main tannin-based foams are tested and compared in this paper. A Hot Disk TPS 2500 measured the thermal conductivity of the tannin-based foams using the transient plane source (TPS) method. Results showed that the tannin foam containing formaldehyde and a low-boiling blowing agent (STD) had the highest thermal conductivity, and the foams without formaldehyde and surfactant (MN65 and MSF) were the only samples with thermal conductivities low enough to be effective environmentally friendly thermal insulators.

Reference: Industrial Crops and Products, 51 (2013) 396-400

DOI: 10.1016/j.indcrop.2013.09.013