LBL generated fire retardant nanocomposites on cotton fabric using cationized starch-clay-nanoparticles matrix

In this work, starch–clay–TiO2-based nanocomposites were deposited on cotton fabric through layer-by-layer (LBL) process and their effect on the flame retardancy, inhibition of pyrolysis and combustion processes were discussed in details. Polyelectrolyte solutions/suspensions of cationized starch and VMT (vermiculite)/TiO2 nanoparticles were used to deposit these nanocomposites in the form of multi-layered coatings (5, 7, 10 and 15 bilayers). Uniform fabric coverage and presence of electrolytes was imaged by scanning electron microcopy (LV-SEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and EDX characterizations. The greatest pyrolysis reduction was found for the StVT-7 sample (7 bilayers); ~30% and 21%, based on microscale combustion calorimetry (MCC) and thermogravimetric analysis (TGA). When using MCC, the improved values of the PHRR ~ 193 W/g, THR ~ 10.7 kJ/g), HRC ~ 390 J/g?K and LOI ~ 22.2% were found for the StVT-7 sample which was strongly supported by the UL-94 test.

» Author: Zeeshan Ur Rehman, Seok-Hwan Huh, Zakir Ullah, Ye-Tang Pan, David G. Churchill, Bon Heun Koo

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 737882.



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