Polymeric tannin/furanic foams fortified with polyurethane (PUR) and 4,4’ diphenylmethane diisocyanate (pMDI) were prepared. The thermo-physical and mechanical properties of the produced foams were investigated experimentally. It was found that since there were a number of active isocyanate groups on the PUR that was used, there was no difference in adding PUR or pMDI to the foams, and so only the results for pMDI were presented. It was found that ...
Author(s): Alain Celzard, Antonio Pizzi, M. C. Basso, V. Fierro, X. Li
Si-SiC composite foams were prepared using tannin-based foams as templates. The foams were prepared by four different methods for the determination of which method would best produce a foam with a pore size under 200 µm. The foam samples were characterized by SEM, XRD, and Raman spectroscopy, and the thermal conductivity of one of the foams was investigated by the transient plane source method. It was found that direct infiltration of ...
Author(s): A. Ortona, Alain Celzard, Antonio Pizzi, C. Zollfrank, G. Amaral-Labat, S. Pusterla, V. Fierro
A variety of tannin-formaldehyde aerogels were produced in order to examine the effects of pH and dilution during their manufacture. The authors produced a phase diagram that could describe them. Extensive physical property characterization was performed on the sample aerogels, including porosity, thermal conductivity, volume shrinkage, BET surface area and microscopic texture. Conditions under which the highest surface area and pore volumes were produced were identified. The TPS instrument was ...
Author(s): Alain Celzard, Andrzej Szczurek, Antonio Pizzi, Gisele Amaral-Labat, Vanessa Fierro
The purpose of this study was to produce an environmentally friendly foam using tannins, that did not contain any formaldehyde or blowing agents. Two experimental tannin foams were compared to two conventional foams, one containing both formaldehyde and blowing agents, and the other containing only a blowing agent. A variety of physical properties were assessed to determine if the new green formulation would be an appropriate replacement, this included thermal ...
Author(s): Alain Celzard, Antonio Pizzi, M. C. Basso, S. Giovando, V. Fierro
Rigid foams were prepared using quebracho tannins and their physical and thermal properties were determined experimentally. These properties were then compared to those of rigid foams derived from mimosa tannins and pine tannins to determine if the nature of the flavonoid affects the properties of the foams. It was found that the preparation of the quebracho tannin-based foams involved the same formulation as that of mimosa tannin-based foams, whereas the ...
Author(s): A. Martinez de Yuso, Alain Celzard, Antonio Pizzi, M.C. Lagel, V. Fierro
