Chitosan/sodium polyborate based micro-nano coating with high flame retardancy and superhydrophobicity for cotton fabric
Chitosan/sodium polyborate based micro-nano coating with high flame retardancy and superhydrophobicity for cotton fabric
复制标题
壳聚糖/聚硼酸钠基棉织物高阻燃超疏水微纳米涂层
DOI：
10.1016/j.ijbiomac.2022.02.062
复制
发表时间：
2022
影响因子：
8.2
通讯作者：
Sheng Zhang
中科院分区：
文献类型：
--
作者：
peng Qi;shuheng Wang;WENJIA WANG;Jun Sun;Hongfu Yuan;Sheng Zhang
采用壳聚糖/聚硼酸钠复合水溶液对棉织物进行阻燃处理，然后用聚二甲基硅氧烷（PDMS）四氢呋喃溶液对棉织物进行超疏水处理，制备出可持续阻燃超疏水棉织物。在具有微纳米粗糙结构的相分离壳聚糖表面包覆聚二甲基硅氧烷，协同提高棉织物的疏水性。阻燃性能测试结果表明，与未处理织物相比，经处理织物的极限氧指数值由18.2%提高到40.0%，热释放速率峰值降低了63.8%，总热释放量降低了57.6%。结果表明，聚乙烯的阻燃性能主要是由于聚乙烯在凝聚相中具有良好的成炭能力。整理后的织物具有防粘、自清洁和油水分离等性能。这种不含任何F、Cl、Br、P元素的涂层处理被认为是生产阻燃和超疏水棉织物的清洁方法。
In this work, a sustainable flame retardant and superhydrophobic cotton fabric was prepared by a two-step process: the cotton fabric was firstly treated with a chitosan/sodium polyborate polyelectrolyte complex water solution to obtain a flame retardant layer, and then treated with a polydimethylsiloxane (PDMS) tetrahydrofuran solution to construct a superhydrophobic layer. The phase-separated chitosan with a micro-nano roughness structure was covered by PDMS, which synergistically improved the hydrophobicity of the cotton fabric. The flammability evaluation indicated that the limiting oxygen index value of the treated fabric was increased to 40.0% from 18.2%, the peak of heat release rate was reduced by 63.8%, and the total heat release was reduced by 57.6% compared with that of the control sample. The enhanced flame retardancy was attributed to the excellent charring ability in the condensed phase. The treated fabric also showed anti-sticking, self-cleaning, and oil/water-separating properties. This coating treatment without any F, Cl, Br, P elements involved is regarded as a clean methodology for producing flame retardant and superhydrophobic cotton fabrics.