Polyurethane composite foams synthesized using bio-polyols and cellulose filler / Katarzyna Uram, Milena Leszczyńska, Aleksander Prociak, Anna Czajka, Michał Gloc, Michał K. Leszczyński, Sławomir ... więcej

Polyurethane composite foams synthesized using bio-polyols and cellulose filler / Katarzyna Uram, Milena Leszczyńska, Aleksander Prociak, Anna Czajka, Michał Gloc, Michał K. Leszczyński, Sławomir Michałowski, Joanna Ryszkowska // Materials [Dokument elektroniczny]. – 2021, Vol. 14, Iss. 13, Spec. Iss., 17 s. : fot., tab., wykr. – Tryb dostępu: https://www.mdpi.com/1996-1944/14/13/3474. – Oznaczenie ref./art.: 3474. – Bibliogr. 50 poz., Abstr. – Special Issue: Development of Bio-Based Composite Foams. – doi: 10.3390/ma14133474. – ISSN 1996-1944

Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing ... więcej

Rigid polyurethane foams were obtained using two types of renewable raw materials: bio-polyols and a cellulose filler (ARBOCEL® P 4000 X, JRS Rettenmaier, Rosenberg, Germany). A polyurethane system containing 40 wt.% of rapeseed oil-based polyols was modified with the cellulose filler in amounts of 1, 2, and 3 php (per hundred polyols). The cellulose was incorporated into the polyol premix as filler dispersion in a petrochemical polyol made using calenders. The cellulose filler was examined in terms of the degree of crystallinity using the powder X-ray diffraction PXRD -and the presence of bonds by means of the fourier transform infrared spectroscopy FT-IR. It was found that the addition of the cellulose filler increased the number of cells in the foams in both cross-sections—parallel and perpendicular to the direction of the foam growth—while reducing the sizes of those cells. Additionally, the foams had closed cell contents of more than 90% and initial thermal conductivity coefficients of 24.8 mW/m∙K. The insulation materials were dimensionally stable, especially at temperatures close to 0 °C, which qualifies them for use as insulation at low temperatures.