Effect of bridged DOPO/polyurethane nanocomposites on solar absorber coatings with reduced flammability
| Autor: | Ivan Jerman, Žiga Štirn, Jelena Vasiljević, Matic Šobak, Marija Čolović, Barbara Simončič, Gregor Žitko, N. Čelan Korošin |
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| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Nanocomposite Materials science Renewable Energy Sustainability and the Environment business.industry Polymer Polyethylene Solar energy chemistry.chemical_compound chemistry General Materials Science Thermal stability Composite material business Fire retardant Flammability Polyurethane |
| Zdroj: | Solar Energy. 231:104-114 |
| ISSN: | 0038-092X |
| DOI: | 10.1016/j.solener.2021.11.046 |
| Popis: | In households, considerable costs are related to energy losses, which are a consequence of maintaining comfortable living temperatures. Improved isolation and utilization of energy harvesting devices is the key to reducing energy losses and the related costs. Polymeric solar absorbers are cost-effective solar energy harvesters that can significantly reduce the energy cost for individual households. One of the concerns related to polymers is their flammability. To mitigate the flammability risk, the present work explores the development of solar absorber paints with flame-retardant properties. Bridged 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives (NED and PHED) in concertation ranges of 10–15 wt% were used in a polyurethane-based matrix to demonstrate the effect of additives on the fire retardancy of the material. Additionally, the rheological and thermal properties of the composite materials were evaluated and described. Furthermore, aluminium and PPS (polyethylene sulphide) substrates were coated with solar absorber paint based on a 15% FR (fire retardant) additive formulation, for which the thermal stability at 150 °C for 655 h was evaluated. It was discovered that PHED is more compatible with the polyurethane matrix than NED, and as expected, a greater amount of FR additives resulted in improved flame retardancy. The long-term stability of absorber paint coatings on Al and PPS was also successfully confirmed by confirming stable solar absorptance and thermal emittance. In future prospects, we believe that the flame retardancy of polyurethane-based coatings could be further improved, and the utilization of covalently bonded FRs should also be considered. |
| Databáze: | OpenAIRE |
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