All-Inorganic Intumescent Nanocoating Containing Montmorillonite Nanoplatelets in Ammonium Polyphosphate Matrix Capable of Preventing Cotton Ignition
Articolo
Data di Pubblicazione:
2016
Citazione:
All-Inorganic Intumescent Nanocoating Containing Montmorillonite Nanoplatelets in Ammonium Polyphosphate Matrix Capable of Preventing Cotton Ignition / J. Alongi, F. Carosio. - In: POLYMERS. - ISSN 2073-4360. - 8:12(2016 Dec 10), pp. 430-443. [10.3390/polym8120430]
Abstract:
In the present manuscript a new concept of completely inorganic intumescent flame
retardant nanocoating comprised of sodium montmorillonite nanoplatelets embedded in an
ammonium polyphosphate matrix has been investigated using cotton as model substrate. The coating,
deposited by multistep adsorption from diluted water-based suspensions/solutions, homogenously
cover each cotton fibers with average thicknesses below 50 nm and add-on up to 5% in weight.
Combustion characterization evidences the interesting properties: indeed, the so-treated fabrics
reached self-extinguishing during horizontal flame spread tests. Furthermore, when the coating
add-on reaches 5%, no ignition has been observed during cone calorimetry tests under 35 kW/m2
heat flux. Residue analyses pointed out the formation of an expanded all-inorganic coating capable
of greatly improving char formation by exerting barrier function towards volatile release and
heat transfer.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
cotton; flame retardancy; combustion; intumescence; sodium cloisite; APP
Elenco autori:
J. Alongi, F. Carosio
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