Data/hora: 05/06/2024 13:18:01

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	12/08/2019	
Data da última atualização: 	12/08/2019	
Autoria: 	DELUCIS, R. de A.; AMICOS, S. C.; MAGALHAES, W. L. E.; PETZHOLD, C. L.	
Afiliação: 	Rafael de Avila Delucis, Pós-graduando da UFRGS; Sandro Campos Amicos, Pós-graduando da UFRGS; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Cesar Liberato Petzhold, UFRGS.	
Título: 	Construction: rigid bio-based polyurethane foams for sandwich panels.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	In: MISHRA, M. Encyclopedia of polymer applications. Boca Raton: CRC Press, 2018. v. 1, p. 624-638.	
DOI: 	10.1201/9781351019422-140000307	
Idioma: 	Inglês	
Conteúdo: 	Polyurethane (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.	
Palavras-Chave: 	Bio-based foams; Compósito; Espuma de base biológica; Espuma de poliuretano; Insulation material; Lightweight panels; Material isolante; Polyether polyols; Sandwich structures; Wood-based composites.	
Thesagro: 	Madeira.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (56900-1) - UPC - PL - DD -  -  -  - DIS