Autor(es):
Cruz-Lopes, Luísa ; Rodrigues, Liliana ; Domingos, Idalina ; Ferreira, José ; Lemos, Luís Teixeira de ; Esteves, Bruno
Data: 2016
Identificador Persistente: http://hdl.handle.net/10400.19/4335
Origem: Repositório Científico do Instituto Politécnico de Viseu
Assunto(s): Bio-based polyol; mechanical tests; polyurethane foam; Pseudotsuga bark; renewable resources; Turkey oak bark; Bio-based polyol; Bio-based polyol; mechanical tests; mechanical tests; polyurethane foam; polyurethane foam; Pseudotsuga bark; Pseudotsuga bark; renewable resources; renewable resources; Turkey oak bark; Turkey oak bark
Descrição
Currently, the polyurethanes industry is dependent on fossil resources to obtain their basic raw materials (polyols and isocyanate), as these are obtained from petroleum products. The aim of this work was to use biopolyols from liquefied Pseudotsuga (Pseudotsuga menziesii) and Turkey oak (Quercus cerris) barks for the production of polyurethane foams and optimize the process. Liquefaction was done with glycerol catalyzed by KOH. Foams were produced following different formulations and using biopolyols from both barks. Subsequently, the foams were characterized according to their mechanical properties and the reaction of the foam formation was monitored by FTIR-ATR. The results show that it is possible to produce polyurethane foams using bio-based polyols and the liquefaction conditions are very important because they influence the characteristics of biopolyols and, consequently the characteristics of the foams. However, the process has to be further optimized so that it can obtain better quality foams
