Abstract
In this paper, the sol-gel technique was used to design hybrid phosphorus-doped silica structures for improving the thermal stability and flame retardancy of cotton fabrics. To this aim, diethylphosphatoethyltriethoxysilane (DPTS) was employed as phosphate alkoxysilane in a multistep procedure that involved multiple layers (from 1 to 6) depositions. The multi-layer coatings were applied by padding using sols containing appropriate molar ratios of the precursor, anhydrous ethanol, catalyst, and hydrochloric acid. Moreover, the synergism P-N on flame retardancy of cotton was assessed by introducing 3-aminopropyltriethoxysilane (APTES) as an N-donor precursor in DPTS sols. The effects of the catalyst during the alkoxide reaction and the silica amount applied by sol-gel treatment on the thermo-oxidative behavior of the treated fabrics were deeply studied. The creation of the silica skeleton on the cotton surface and the interactions between the cellulosic fibres and the doped layer were investigated using FT-IR ATR spectroscopy. Moreover, thermal and thermo-oxidative stability, flammability properties, and combustion behavior of the sol-gel treated cotton fabrics were also studied, proving the effectiveness of the sol-gel coating in the fire protection of the cellulosic substrate.
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. P.J. Wakelyn, N.R. Bertoniere, A.D. French, D.P. Thibodeaux, B.A. Triplett, M.A. Rousselle, W.R.J. Goynes, J.V. Edwards, L. Hunter, D.D. McAlister, G.R. Gamble, Cotton Fiber chemistry and technology (first ed.). CRC Press, Taylor & Francis Group (Boca Raton) 2006.
2. Flame retardant challenges for textiles and fibres: New chemistry versus innovatory solutions;Horrocks;Polymer Degradation and Stability
3. Synergism and catalysis in flame retardancy of polymers;Lewin;Polymers for Advanced Technologies,2001
4. Fire Self-Extinguishing Cotton Fabric: Development of Piperazine Derivatives Containing Phosphorous-Sulfur-Nitrogen and Their Flame Retardant and Thermal Behaviors;Nguyen;Materials Sciences and Applications
5. Facile flame retardant finishing of cotton fabric with hydrated sodium metaborate;Tawiah;Cellulose,2019