Lookup NU author(s): Professor Geoffrey Gibson,
Wan Wan Jusoh,
Dr George Kotsikos
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
Passive fire protection materials (PFP) have been characterised quantitatively using a constant heat flux propane burner test, with the PFP attached to a steel substrate. The burner test was able to produce a large, constant heat flux, to simulate a severe fire condition. The heat transferred through the PFP was calculated from the temperature rise of the steel. A simplified model is discussed, to account for different combinations of substrate thickness, PFP thickness, heat flux and exposure time. It was found that, despite the complex processes of resin decomposition and intumescence, heat transmission could be modelled, to a reasonable approximation, by treating the PFP as a material with single point values of apparent thermal diffusivity and conductivity. This leads to an equation that can be used to characterise PFPs and indeed to specify their required thickness.The burner test was employed to interpret the effects of adding small quantities of three nano-materials: halloysite nanotubes (HNT), multi-walled carbon nanotubes (MWCNT) and graphene nanoplatelets (GNP), to a standard PFP formulation. It was found that HNT addition resulted in a significant performance improvement, whereas the other nano-materials did not produce an improvement.
Author(s): Gibson AG, Wan-Jusoh WNB, Kotsikos G
Publication type: Article
Publication status: Published
Journal: Polymer Degradation and Stability
Print publication date: 01/02/2018
Online publication date: 17/01/2018
Acceptance date: 13/01/2018
Date deposited: 22/01/2018
ISSN (print): 0141-3910
ISSN (electronic): 1873-2321
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