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Thermal and fire stability of cotton fabrics coated with hybrid phosphorus-doped silica films

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Abstract

Hybrid phosphorus-doped silica films have been prepared through sol–gel processes to enhance the thermal and fire stability of cotton. To this aim, 3-aminopropyltriethoxysilane and N,N,N′,N′,N″,N″-hexakis-methoxymethyl-[1,3,5]triazine-2,4,6-triamine have been reacted with diethylphosphatoethyltriethoxysilane. FT-IR spectroscopy was exploited for assessing the formation of the silica skeleton on the cotton surface and for evaluating the interactions between the cellulosic fibres and the doped film. The effect of the concurrent presence of Si, P and N on cotton has been investigated by thermogravimetric analyses and the flammability behaviour has been assessed by vertical flammability tests, as well. The sol–gel treatments in the presence of phosphorus and nitrogen turned out to play a protective role on the degradation of the cotton fibres, hindering the formation of volatile species that fuel the further degradation and favouring the formation of a carbonaceous structure.

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Acknowledgements

The authors would like to thank Eng. Marco Longhi and Dr. Mihaela Ciobanu for the technical support in preparing the sol–gel treated fabrics.

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Authors and Affiliations

  1. Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, sede di Alessandria, V. Teresa Michel 5, 15121, Alessandria, Italy

    Jenny Alongi & Giulio Malucelli

  2. Dipartimento di Ingegneria Industriale, Università di Bergamo, Viale Marconi 5, 24044, Dalmine, Bergamo, Italy

    Claudio Colleoni & Giuseppe Rosace

Authors
  1. Jenny Alongi
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  2. Claudio Colleoni
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  3. Giuseppe Rosace
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  4. Giulio Malucelli
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Correspondence to Giulio Malucelli.

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Alongi, J., Colleoni, C., Rosace, G. et al. Thermal and fire stability of cotton fabrics coated with hybrid phosphorus-doped silica films. J Therm Anal Calorim 110, 1207–1216 (2012). https://doi.org/10.1007/s10973-011-2142-0

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  • DOI: https://doi.org/10.1007/s10973-011-2142-0

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