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Fire Retardant Treatment of Wood – State of the Art and Future Perspectives

  • Philipp SauerbierEmail author
  • Aaron Kilian Mayer
  • Lukas Emmerich
  • Holger Militz
Conference paper
  • 28 Downloads

Abstract

Outdoor and indoor exposed wooden structures are prone to the hazard of fire. Thisr is often inevitable and hardly avoidable by factors such as the design. However, wood is widely used as a structural element in buildings, it is present all-over public places and the main source for indoor furniture. Thus, and due to recent incidents, the demand for an effective and leaching-resistant fire protection is rising. In addition, fire protection technologies are desired, which survive mechanical processing. Considering the latter, protective surface coatings show a high fire protection, while on opposite they are very sensitive to mechanical damages. Therefore, various approaches based on a full impregnation of timber with fire retardants have been studied. In the past aluminum, boron, halogens (e.g. bromine) and more recently phosphorus and nitrogen, were shown to be effective fire retardants in wood. Nowadays, most conventional fire retardant systems are halogen-free, while boron is still used. However, boron shows a low resistance to leaching and is classified as a SVHC candidate, which brings up health and environmental issues. The same is true for formaldehyde. Concerning environmental issues, nitrogen and phosphorus were found to be promising alternatives and highly effective fire retardants. Leaching in service was slightly reduced compared to boron but a decrease in strength properties was detected after treatment of wood with those compounds. In general, an increased hygroscopicity of wood was found after any of the listed treatments, together with a leaching of the flame-retardant chemical which was still too high to guarantee a long-term fire protection in wood exposed outside. The overall aim of this study is to (1) give an overview about the past developments and most established fire retardant chemicals and (2) review recent findings and developments in terms of permanent fire retardant treatments of wood.

Keywords

Chemical wood modification Fire retardant Impregnation Review 

References

  1. 1.
    Odeen K (1985) Fire resistance of wood structures. Fire Technol 21:34–40.  https://doi.org/10.1007/BF01095562CrossRefGoogle Scholar
  2. 2.
    Cisek T, Piechocki J (1985) Influence of fire retardants on smoke generation from wood and wood derived materials. Fire Technol 21:122–133.  https://doi.org/10.1007/BF01040154CrossRefGoogle Scholar
  3. 3.
    Rowell RM (ed) (2013) Handbook of wood chemistry and wood composites. CRC Press, Boca RatonGoogle Scholar
  4. 4.
    Barber D, Gerard R (2015) Summary of the fire protection foundation report - fire safety challenges of tall wood buildings. Fire Sci Rev 4.  https://doi.org/10.1186/s40038-015-0009-3
  5. 5.
    Buschow KHJ (ed) (2001) Encyclopedia of materials: science and technology. Elsevier, AmsterdamGoogle Scholar
  6. 6.
    Lowden L, Hull T (2013) Flammability behaviour of wood and a review of the methods for its reduction. Fire Sci Rev 2:4.  https://doi.org/10.1186/2193-0414-2-4CrossRefGoogle Scholar
  7. 7.
    Green J (1996) Mechanisms for flame retardancy and smoke suppression-a review. J Fire Sci 14:426–442.  https://doi.org/10.1177/073490419601400602CrossRefGoogle Scholar
  8. 8.
    Browne F (1958) Theories of the combustion of wood and its control a survey of the literature. Report #2136, Forest Products Laboratory, Madison (Wi)Google Scholar
  9. 9.
    Deveci I, Baysal E, Toker H, Yuksel M, Turkoglu T, Peker H (2017) Thermal characteristics of oriental beech wood treated with some leaching resistant bor ates. Wood Res 62:12Google Scholar
  10. 10.
    Boric acid - Registry of SVHC intentions until outcome – ECHA. https://echa.europa.eu/de/registry-of-svhc-intentions/-/dislist/details/0b0236e180e4b39c
  11. 11.
    Tondi G, Haurie L, Wieland S, Petutschnigg A, Lacasta A, Monton J (2014) Comparison of disodium octaborate tetrahydrate-based and tannin-boron-based formulations as fire retardant for wood structures: dot and tannin-boron as fire retardant. Fire Mater 38:381–390.  https://doi.org/10.1002/fam.2186CrossRefGoogle Scholar
  12. 12.
    Alaee M (2003) An overview of commercially used brominated flame retardants, their applications, their use patterns in different countries/regions and possible modes of release. Environ Int 29:683–689.  https://doi.org/10.1016/S0160-4120(03)00121-1CrossRefGoogle Scholar
  13. 13.
    Marney DCO, Russell LJ, Mann R (2008) Fire performance of wood (Pinus radiata) treated with fire retardants and a wood preservative. Fire Mater 32:357–370.  https://doi.org/10.1002/fam.973CrossRefGoogle Scholar
  14. 14.
    Hirata T, Kawamoto S, Nishimoto T (1991) Thermogravimetry of wood treated with water-insoluble retardants and a proposal for development of fire-retardant wood materials. Fire Mater 15:27–36.  https://doi.org/10.1002/fam.810150106CrossRefGoogle Scholar
  15. 15.
    Lewin M (1997) Flame retarding of wood by chemical modification with bromate-bromide solutions. J Fire Sci 15:29–51.  https://doi.org/10.1177/073490419701500103CrossRefGoogle Scholar
  16. 16.
    Horacek H, Grabner R (1996) Advantages of flame retardants based on nitrogen compounds. Polym Degrad Stab 54:205–215.  https://doi.org/10.1016/S0141-3910(96)00045-6CrossRefGoogle Scholar
  17. 17.
    Stevens R, van Es DS, Bezemer R, Kranenbarg A (2006) The structure–activity relationship of fire retardant phosphorus compounds in wood. Polym Degrad Stab 91:832–841.  https://doi.org/10.1016/j.polymdegradstab.2005.06.014CrossRefGoogle Scholar
  18. 18.
    LeVan SL, Winandy JE (1990) Effects of fire retardant treatments on wood strength: a review. Wood Fiber Sci 22:20Google Scholar
  19. 19.
    Truax TR, Harrison CA, Baechler RH (1956) Experiments in fireproofing wood, fifth progress report. Forest Products Laboratory, US Department of AgricultureGoogle Scholar
  20. 20.
    Hull TR, Witkowski A, Hollingbery L (2011) Fire retardant action of mineral fillers. Polym Degrad Stab 96:1462–1469.  https://doi.org/10.1016/j.polymdegradstab.2011.05.006CrossRefGoogle Scholar
  21. 21.
    Mazela B, Broda M, Perdoch W Fire resistance of wood treated with potassium carbonate and silanes. 8Google Scholar
  22. 22.
    Mai C, Militz H (2004) Modification of wood with silicon compounds inorganic silicon compounds and sol-gel systems: a review. Wood Sci Technol 37:339–348.  https://doi.org/10.1007/s00226-003-0205-5CrossRefGoogle Scholar
  23. 23.
    Bulewicz EM, Pelc A, Kozlowski R, Miciukiewicz A (1985) Intumescent silicate-based materials: mechanism of swelling in contact with fire. Fire Mater 9:171–175.  https://doi.org/10.1002/fam.810090405CrossRefGoogle Scholar
  24. 24.
    Giudice CA, Pereyra AM (2009) Silica nanoparticles in high silica/alkali molar ratio solutions as fire-retardant impregnants for woods. Fire Mater. n/a-n/a (2009).  https://doi.org/10.1002/fam.1018
  25. 25.
    Pabeliña KG, Lumban CO, Ramos HJ (2012) Plasma impregnation of wood with fire retardants. Nucl Instrum Methods Phys Res Sect B: Beam Interact Mater Atoms 272:365–369.  https://doi.org/10.1016/j.nimb.2011.01.102CrossRefGoogle Scholar
  26. 26.
    Sun QF, Lu Y, Zhang HM, Yang DJ, Xu JS, Li J, Liu YX, Shi JT (2012) Flame retardancy of wood coated by ZnO nanorod arrays via a hydrothermal method. Mater Res Innov 16:326–331.  https://doi.org/10.1179/1433075X11Y.0000000066CrossRefGoogle Scholar
  27. 27.
    Costes L, Laoutid F, Brohez S, Dubois P (2017) Bio-based flame retardants: when nature meets fire protection. Mater Sci Eng: R: Rep 117:1–25.  https://doi.org/10.1016/j.mser.2017.04.001CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Philipp Sauerbier
    • 1
    Email author
  • Aaron Kilian Mayer
    • 1
  • Lukas Emmerich
    • 1
  • Holger Militz
    • 1
  1. 1.Wood Biology and Wood Products, Faculty of Forest SciencesUniversity of GoettingenGoettingenGermany

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