X-ray radioscopy validation of a polyol functionalized with graphene oxide for producing rigid polyurethane foams with improved cellular structures

[Display omitted] •Polyols functionalized with GO (GO-f) and filled with GO (GO-d) are used.•The foaming of RPU foams with GO-f or GO-d is followed by X-Ray radioscopy.•The cellular structure of RPU foams are improved by incorporation of GO-f.•GO-f offers better results than GO-d. Fillers can be dis...

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Bibliographic Details
Published in:European polymer journal 2019-09, Vol.118, p.404-411
Main Authors: Santiago-Calvo, Mercedes, Pérez-Tamarit, Saúl, Cimavilla-Román, Paula, Blasco, Victoria, Ruiz, Carolina, París, Rodrigo, Villafañe, Fernando, Rodríguez-Pérez, Miguel Ángel
Format: Article
Language:English
Subjects:
Cellular structure
Density
Dispersion
Filler agglomeration
Fillers
Foaming
Graphene
Graphene oxide
Nanocomposites
Nucleation
Organic chemistry
Plastic foam
Polyols
Polyurethane
Polyurethane foam
X-ray radioscopy
X-rays
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Summary:[Display omitted] •Polyols functionalized with GO (GO-f) and filled with GO (GO-d) are used.•The foaming of RPU foams with GO-f or GO-d is followed by X-Ray radioscopy.•The cellular structure of RPU foams are improved by incorporation of GO-f.•GO-f offers better results than GO-d. Fillers can be dispersed in polyurethane (PU) components to produce PU foams with improved properties by different methods. Herein, graphene oxide (GO) is chemically linked to polyol chains in order to suppress fillers agglomeration. Then the foaming behaviour of rigid polyurethane (RPU) foams from polyols functionalized with GO (GO-f) is compared with the one of RPU foams containing GO dispersed in the polyol (GO-d) by high shear mixing. Relative density, cell size, and cell nucleation density of the RPU foam nanocomposites are monitored during the foaming process by using X-ray radioscopy. The results obtained demonstrate that the use of polyol functionalized with GO-f offers a high improvement of the cellular structure and also makes the results more reproducible.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2019.06.012