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An eco-friendly and effective flame retardant coating for cotton fabric based on phytic acid doped silica sol approach
Progress in Organic Coatings ( IF 3.42 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.porgcoat.2020.105539
Xian-Wei Cheng; Ren-Cheng Tang; Jin-Ping Guan; Shao-Qiang Zhou

The high flammability of cellulosic materials somewhat limits their practical application. The introduction of an environmentally benign flame retardant coating for cotton fabric was achieved by hydrolyzing tetraethoxysilane and doping the silica sol with phytic acid in the presence of sodium alginate. The hybrid silica sol had high condensation degree and the modified silica particles had a spherical structure. The coated cotton fabrics with the hybrid PA/silica sol systems showed enhanced thermal stability at high temperatures, and displayed significantly suppressed heat and smoke generation ability, compared with the uncoated one. The hybrid silica sol coatings influenced the combustion performance of cotton via a charring action, and endowed the cotton fabrics with self-extinguishing ability during the vertical flammability test, demonstrating the improvement in fire resistance. The coated cotton fabrics displayed enhanced char yields, whilst maintained their texture structures after burning. Besides, the silicon- and phosphorus-containing components were also found to have a synergistic flame retardant action on cotton.
更新日期:2020-01-08

 

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