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A Pathway toward a New Era of Open-Cell Polyurethane Foams—Influence of Bio-Polyols Derived from Used Cooking Oil on Foams Properties
Content Provider | MDPI |
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Author | Maria, Kurańska Malewska, Elżbieta Polaczek, Krzysztof Prociak, Aleksander Kubacka, Joanna |
Copyright Year | 2020 |
Description | In order to create greener polyurethane (PUR) foams, modified used cooking oils (UCO) were applied as starting resources for the synthesis of bio-polyols. The bio-polyols were produced using transesterification of UCO with diethylene glycol (UCO_DEG) and triethanolamine (UCO_TEA). Next, open-cell PUR foams were synthesized by replacing 20, 40, 60, 80 and 100% of the petrochemical polyol with the bio-polyol UCO_DEG or UCO_TEA. It was observed that an increasing bio-polyol content (up to 60%) led to an increase of the closed cell content. However, a further increase in the bio-polyol content up to 100% resulted in foam cell opening. The bio-foams obtained in the experiment had an apparent density of 13–18 kg/m3. The coefficient of thermal conductivity was determined at three different average temperatures: 10, 0 and −10 °C. The PUR bio-foams modified with bio-polyol UCO_TEA had lower values of thermal conductivity, regardless of the average temperature (35.99–39.57 mW/m·K) than the foams modified with bio-polyol UCO_DEG (36.95–43.78 mW/m·K). The compressive strength of most of the bio-foams was characterized by a higher value than the compressive strength of the reference material (without bio-polyol). Finally, it was observed that the bio-materials exhibited dimensional stability at 70 °C. |
Starting Page | 5161 |
e-ISSN | 19961944 |
DOI | 10.3390/ma13225161 |
Journal | Materials |
Issue Number | 22 |
Volume Number | 13 |
Language | English |
Publisher | MDPI |
Publisher Date | 2020-11-16 |
Access Restriction | Open |
Subject Keyword | Materials Paper and Wood Green Open-cell Polyurethane Foams Bio-polyols Modified Used Cooking Oil Spray Foams |
Content Type | Text |
Resource Type | Article |