Anti-Flammable Properties of Cotton Fabrics Using Eco Friendly Inorganic Materials by Layering Self-Assisted Processing
A flame retardant surface has been prepared by the layer-by layer assemblies of branched polyethylenimine (BPEI), kaolin, urea, and diammonium phosphate (DAP) on cotton fabrics. Four different kinds of cotton fabrics (print cloth, mercerized print cloth, mercerized twill, and fleece) were prepared using solutions of BPEI, urea, DAP, and kaolin. Layer-by-layer assemblies for flame retardant properties were applied by the pad-dry-cure method and each coating formula was rotated for 10, 20, 30, or 40 bilayers. To assess the effectiveness to resist flame propagation on treated fabrics of different constructions the vertical flammability test (ASTM D 6413-11) was used. In most cases char lengths of fabrics that passed the vertical flammability tests were less than 50% of the original length and after-flame and after-glow times were less than one second. Thermogravimetric analysis (TGA) and limiting oxygen indices (LOI, ASTM D 2863-09) were also used to test for flame retardancy. All untreated fabrics showed LOI values of about 19-21% oxygen in nitrogen. LOI values for the four types of treated fabrics were greater than 35% when add-on wt% values were between 11.1 – 18.6 wt %. In addition, structural characterizations of treated fabrics were studied by SEM methods.
Anti-Flammable Properties of Cotton Fabrics Using Eco Friendly Inorganic Materials by Layering Self-Assisted Processing, International Journal of Materials Science and Applications.
Vol. 7, No. 4,
2018, pp. 115-125.
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