Uram Katarzyna, Leszczyńska Milena, Prociak Aleksander, Czajka Anna, Gloc Michał, Leszczyński Michał K, Michałowski Sławomir, Ryszkowska Joanna
Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.
Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland.
Materials (Basel). 2021 Jun 22;14(13):3474. doi: 10.3390/ma14133474.
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.
生物多元醇和一种纤维素填料（ARBOCEL P 4000 X，德国罗森贝格的JRS Rettenmaier公司）。一种含有40 wt.%菜籽油基多元醇的聚氨酯体系用纤维素填料进行改性，添加量为1、2和3 php（每百份多元醇）。纤维素作为填料分散体在使用压延机制成的石化多元醇中加入到多元醇预混物中。使用粉末X射线衍射（PXRD）对纤维素填料的结晶度进行了检测，并通过傅里叶变换红外光谱（FT-IR）检测了化学键的存在情况。结果发现，添加纤维素填料增加了泡沫在平行和垂直于泡沫生长方向的两个横截面中的泡孔数量，同时减小了这些泡孔的尺寸。此外，这些泡沫的闭孔含量超过90%，初始导热系数为24.8 mW/m∙K。这些保温材料尺寸稳定，尤其是在接近0°C的温度下，这使其有资格用作低温保温材料。
