Kamińska Klaudia, Barczewski Mateusz, Kurańska Maria, Malewska Elżbieta, Polaczek Krzysztof, Prociak Aleksander
Department of Chemistry and Technology of Polymers, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.
Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland.
Materials (Basel). 2022 Sep 2;15(17):6087. doi: 10.3390/ma15176087.
This article presents an ecological approach based on climate neutrality to the synthesis of open-cell polyurethane foams with modified used cooking rapeseed oils. Water was used as a chemical blowing agent in the amount of 20-28 wt.% in relation to the weight of the bio-polyol. The influence of water on the physical and mechanical properties of the synthesized foams was investigated. The resultant porous materials were tested for the content of closed cells, cell structure, apparent density, thermal conductivity, compressive strength, and dimensional stability. It was found that the apparent density decreased in the range of 11-13 kg/m when the amount of the foaming agent was increased. In the next step, a foam with a water content of 22% was selected as having the most favorable physico-mechanical properties among all the foams with various water contents. The isocyanate index of the selected foam was then changed from 0.6 to 1.1 and it was observed that the compressive strength increased by an average of 10 kPa. The thermal conductivity coefficients of the final materials with different water contents and isocyanate indices were comparable and in the range of 40-43 mW/m·K.
本文提出了一种基于气候中和的生态方法，用于合成含有改性废菜籽油的开孔聚氨酯泡沫。相对于生物多元醇的重量，水用作化学发泡剂，用量为20-28 wt.%。研究了水对合成泡沫物理和力学性能的影响。对所得多孔材料进行闭孔含量、泡孔结构、表观密度、热导率、抗压强度和尺寸稳定性测试。发现当发泡剂用量增加时，表观密度在11-13 kg/m范围内降低。下一步，在所有不同含水量的泡沫中，选择含水量为22%的泡沫，其具有最有利的物理力学性能。然后将所选泡沫的异氰酸酯指数从0.6改变到1.1，观察到抗压强度平均增加了10 kPa。不同含水量和异氰酸酯指数的最终材料的热导率系数相当，在40-43 mW/m·K范围内。
