Layer by layer complex architectures based on ammonium polyphosphate,chitosan and silica on polyester-cotton blends: flammability and combustion behaviour |
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Authors: | Jenny Alongi Federico Carosio Giulio Malucelli |
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Institution: | (1) Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy |
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Abstract: | Hybrid organic–inorganic coatings containing ammonium polyphosphate (APP), chitosan and silica have been deposited on polyester-cotton
blends (PET-CO), exploiting the layer by layer assembly. To this aim, two different complex architectures (namely, chitosan/APP
bilayers plus silica/silica bilayers or silica/silica/chitosan/APP quadlayers) have been thoroughly investigated. The effect
of their morphologies on the flame retardancy properties of the fabrics (flammability and combustion behaviour) has been assessed.
More specifically, some of the above complex architectures exhibited significant enhancements concerning flammability (i.e.
the suppression of afterglow, together with a considerable final residue increase) and combustion behaviour as evidenced by
cone calorimeter tests. A close relationship between the overall flame retardancy properties of the blends and the level of
dishomogeneity of the LbL architectures has been shown. |
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Keywords: | |
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