Microstructure and thermal characterization of aerogel–graphite polyurethane spray-foam composite for high efficiency thermal energy utilization

Seunghwan Wi, Umberto Berardi, Sam Di Loreto, Sumin Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Aerogel is a superinsulating material with an extremely low thermal conductivity (<0.015 W/m·K), high porosity (>99 %), and extremely low density. In this study, a new closed-cell spray polyurethane (PU) foam with aerogel was developed and investigated. In particular, a PU foam with aerogel and graphite (PUAG) was prepared by mixing aerogel for reducing the thermal conductivity of the foam and a small concentration of graphite for improving its flame-retardancy performance. The performance of the prepared PUAG was analyzed via several tests, including density measurements, thermal-conductivity measurements, morphology examination, flame-retardancy evaluation, thermogravimetric analysis, and dynamic heat transfer analysis. A 20 % reduction in the thermal conductivity compared with traditional PU was observed. Additionally, the PUAG exhibited a reduction in the total smoke production and a 10 % reduction in the surface peak temperature.

Original languageEnglish
Article number122656
JournalJournal of Hazardous Materials
Volume397
DOIs
Publication statusPublished - 2020 Oct 5

Bibliographical note

Funding Information:
The authors are thankful for the financial support of the Natural Sciences and Engineering Research Council of Canada (NSERC) for the financial support through the Discovery Grant and the Center for Excellence for the VIP 1 project n. 27195. This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2019R1A2C4100284 ).

Publisher Copyright:
© 2020 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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