Abstract 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.

中文翻译：

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基于植酸掺杂硅溶胶方法的棉织物环保高效阻燃涂层

摘要 纤维素材料的高易燃性在一定程度上限制了其实际应用。通过在海藻酸钠存在下水解四乙氧基硅烷并用植酸掺杂硅溶胶，实现了一种用于棉织物的环境友好型阻燃涂层的引入。杂化硅溶胶具有较高的缩合度，改性二氧化硅颗粒具有球形结构。与未涂层相比，具有混合 PA/硅溶胶系统的涂层棉织物在高温下表现出更高的热稳定性，并显示出显着抑制的生热和发烟能力。混合硅溶胶涂层通过炭化作用影响棉花的燃烧性能，并赋予棉织物在垂直燃烧试验中自熄的能力，证明耐火性能的提高。涂层棉织物显示出更高的炭化率，同时在燃烧后保持其质地结构。此外，还发现含硅和含磷组分对棉花具有协同阻燃作用。