Data/hora: 15/06/2024 01:11:33

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 12/12/2017
Data da última atualização: | 21/05/2018
Autoria: | DELUCIS, R. de A.; MAGALHAES, W. L. E.; PETZHOLD, C. L.; AMICO, S. C.
Afiliação: | Rafael de Avila Delucis, Pós-graduando da UFRGS; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Cesar Liberato Petzhold, UFRGS; Sandro Campos Amico, Pós-graduando da UFRGS.
Título: | Forest-based resources as fillers in biobased polyurethane foams.
Ano de publicação: | 2018
Fonte/Imprenta: | Journal of Applied Polymer Science, v. 135, n. 3, artigo 45684, Jan. 2018.
Páginas: | 7 p.
DOI: | 10.1002/APP.45684
Idioma: | Inglês
Conteúdo: | Six fillers from forestry wastes (wood, bark, cones and needles from young pine trees, kraft lignin, and recycled paper sludge from industry wastes) were incorporated into polyurethane (PU)-based foams prepared via free-rise pouring method. Variable filler contents (1, 5, and 10 wt %) and NCO/OH ratios (0.6, 0.9, and 1.2) were investigated. A simple mixture (1:3) of castor oil and crude glycerin (byproduct from biodiesel production) was used as biobased polyol. The foam composites were investigated through spectroscopy, morphological, mechanical, and hygroscopic analyses. The addition of fillers decreased water uptake and yielded rigid PU systems with more homogenous cell structure. The 1% and 5% reinforcement wood were the most effective among the studied compositions, with better mechanical and hygroscopic performance, probably due the higher compatibility of the wood with the PU system, which promote urethanic bonds between filler and isocyanate, as indicated by wet chemical results and micrographs.
Palavras-Chave: | Compósitos; Thermosets.
Thesagro: | Celulose; Madeira.
Thesaurus Nal: | Cellulose; Composite materials; Composite wood products.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (56148-1) - UPC - AP - DD -  -  -  - DIS