02237naa a2200301 a 450000100080000000500110000800800410001902400410006010000220010124500970012326000090022052012950022965000120152465300200153665300150155665300300157165300260160165300240162765300230165165300220167465300220169665300240171865300260174270000180176870000240178670000200181077301050183021112412019-08-12       2018    bl uuuu     u00u1 u    #d7 a10.1201/9781351019422-1400003072DOI1 aDELUCIS, R. de A.  aConstructionbrigid bio-based polyurethane foams for sandwich panels.h[electronic resource]  c2018  aPolyurethane (PU) foams are dominant materials in several markets due to their characteristics such as low cost, wide range of densities, low fragility, easy adhesion to coatings, thermal and acoustic insulation, and high versatility. Due to environmental concerns, bio-based polyester polyols have been used to partly replace traditional hydroxylated polyether polyols from petroleum. Biobased PU properties may be modified by chemically treating the polyol, or with the aid of chemical additives or synthetic and vegetable-based fillers, e.g., wood flour and its derivatives, which affect their rheological, morphological, thermal, and mechanical characteristics, even though this effect still lacks comprehensive studies, especially about filled foams. This review also encompasses the use of neat and filled PU foams as cores in structural insulation panels, including aspects such as processing, properties, advantages, and challenges. Indeed, although metallic profiles and composite plates are most used as face sheets of sandwich panels due to their high performance, solid wood and wood-based panels can be interesting alternatives to widen the range of applications of bio-based PU cores, retaining their sustainable character. Other applications are also discussed in this entry.  aMadeira  aBio-based foams  aCompósito  aEspuma de base biológica  aEspuma de poliuretano  aInsulation material  aLightweight panels  aMaterial isolante  aPolyether polyols  aSandwich structures  aWood-based composites1 aAMICOS, S. C.1 aMAGALHAES, W. L. E.1 aPETZHOLD, C. L.  tIn: MISHRA, M. Encyclopedia of polymer applications. Boca Raton: CRC Press, 2018.gv. 1, p. 624-638.