Effect of functionalized halloysite nanotubes on fire resistance and water tolerance of intumescent fire-retardant coatings for steel structures
Article
Article Title | Effect of functionalized halloysite nanotubes on fire resistance and water tolerance of intumescent fire-retardant coatings for steel structures |
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ERA Journal ID | 1373 |
Article Category | Article |
Authors | Zhang, Qi, Shu, Yongjun, Zhang, Yinghao, Huo, Siqi, Ye, Guofeng, Wang, Cheng and Liu, Zhitian |
Journal Title | Progress in Organic Coatings |
Journal Citation | 197 |
Article Number | 108843 |
Number of Pages | 13 |
Year | 2024 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0300-9440 |
1873-331X | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.porgcoat.2024.108843 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S0300944024006350 |
Abstract | To improve the comprehensive performance of intumescent fire-retardant coatings, the functionalized halloysite nanotubes (HNTs-D, HNTs@Fe3O4, and HNTs-D@Fe3O4) were synthesized as synergistic flame retardants and incorporated into intumescent fire-retardant coatings (IFRC) for steel structures, demonstrating significant flame retardant properties. Among these modified halloysite nanosheets, HNTs-D@Fe3O4 showed the best flame retardancy and water resistance. Adding the optimal addition amount (3 wt%) of HNTs-D@Fe3O4 can increase the residual weight of coating from 28.10 % to 38.40 % and reduce the backside temperature of the coated steel plate from 288 °C to 177 °C, indicating that HNTs-D@Fe3O4 can effectively improve the thermal stability and insulation performances of intumescent fire-retardant coatings. Cone calorimetric analysis showed HNTs-D@Fe3O4 can effectively suppress the heat and smoke release of the intumescent fire-retardant coatings. Compared with the unmodified coating sample, the total heat release (THR) and total smoke release (TSR) of the HNTs-D@Fe3O4-containing coating sample were reduced by 66.04 % and 11.36 %. HNTs-D@Fe3O4 facilitates the formation of dense char layers confirmed by the micro morphology characterization. Further mechanism analysis shows that HNTs-D@Fe3O4 has obvious catalytic carbonization effect and is helpful to construct the dense expanded char layer with higher graphitization degree. The uniformly dispersed HNTs-D@Fe3O4 improved the water resistance of intumescent fire-retardant coatings, which is mainly due to the hydrophobicity and barrier effect, thus effectively preventing the loss of water-soluble components. |
Keywords | Functionalized halloysite nanotubes; Intumescent fire-retardant coatings; Fire resistance; Water tolerance |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400507. Fire safety engineering |
Public Notes | The accessible file is the accepted version of the paper. Please refer to the URL for the published version. |
Byline Affiliations | Wuhan Institute of Technology, China |
School of Engineering | |
Centre for Future Materials |
https://research.usq.edu.au/item/z9vy1/effect-of-functionalized-halloysite-nanotubes-on-fire-resistance-and-water-tolerance-of-intumescent-fire-retardant-coatings-for-steel-structures
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