Abstract Chitosan was added to cotton fabrics coated with sodium phytate and 3-Aminopropyl triethoxysilane (APTES) to further enhance the fire retardant property by the layer-by-layer (LBL) assembly. The surface morphologies before and after flaming and structure of coated cotton fabrics were evaluated by scanning electron microscopy and Fourier transform infrared analysis. The thermal degradation properties, fire retardancy, and combustion properties of this system were investigated by Fourier transform infrared analysis, thermogravimetric analysis coupled with Fourier transform infrared analysis (TG-FTIR) in the N2 atmosphere, the thermogravimetric analysis in air atmosphere, limiting oxygen index test (LOI), vertical burning test and cone calorimeter test, respectively. Sodium phytate, chitosan and hydrolyzed APTES were successfully deposited and well distributed on the surface of cotton fibers. The LOI value of the coated cotton fabric with 15BL was 29.0%, and it extinguished at once in the vertical burning test, while the coated cotton fabrics with 5BL and 10BL were burned out. The deposition of sodium phytate, chitosan and hydrolyzed APTES led to the decrease of heat release rate, total heat release, total smoke release and smoke production rate. The promoted fire retardancy was assigned to thermally stable residuals formed on the surface of cotton fibers, which prohibited heat/mass transfer from combustion zone to polymer degradation zone. TG-FTIR results indicated that flame retardant cotton fabrics produced more nonflammable gases (CO2 and H2O) and less combustible gases than them of the control sample did, increasing flame retardant properties of flame retardant cotton fabrics.

中文翻译：

---

LBL组装法壳聚糖对植酸钠和APTES涂层棉织物阻燃和热降解性能的影响

摘要 壳聚糖被添加到涂有植酸钠和3-氨基丙基三乙氧基硅烷（APTES）的棉织物中，通过逐层（LBL）组装进一步提高阻燃性能。通过扫描电子显微镜和傅里叶变换红外分析对涂层棉织物燃烧前后的表面形貌和结构进行了评价。通过傅里叶变换红外分析、热重分析结合傅里叶变换红外分析(TG-FTIR)在N2气氛中、空气气氛中的热重分析、极限氧指数研究了该体系的热降解性能、阻燃性和燃烧性能。试验（LOI）、垂直燃烧试验和锥形量热仪试验。植酸钠，壳聚糖和水解APTES成功沉积并分布在棉纤维表面。15BL涂层棉织物的LOI值为29.0%，在垂直燃烧试验中立即熄灭，而5BL和10BL涂层棉织物则被烧毁。植酸钠、壳聚糖和水解APTES的沉积导致放热速率、总放热量、总发烟量和产烟率降低。促进的阻燃性归因于在棉纤维表面形成的热稳定残留物，其阻止了从燃烧区到聚合物降解区的热/质量传递。TG-FTIR 结果表明，与对照样品相比，阻燃棉织物产生更多的不可燃气体（CO2 和 H2O）和更少的可燃气体，