Tannin-based foams are new, ecological, cheap and versatile cellular materials. In this paper, we present the last advances concerning these foams, which offer various promising perspectives in the fields of heat insulation, fire safety, shock absorption and other applications such as precursors of smart cellular ceramics. Some of these foams are natural at the 95% level, others are as insulating as are PUR, and others are extremely hard or even elastic. The history of these materials is described, from the first brittle samples designed in the nineties for the market of flower foams, to the present, 5th, viscoelastic and flexible, generation.
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