Chitosan/sodium polyborate based micro-nano coating with high flame retardancy and superhydrophobicity for cotton fabric
作者：Peng Qi, Shuheng Wang, Wenjia Wang, Jun Sun, Hongfu Yuan, Sheng Zhang
關(guān)鍵字：用于棉織物的高阻燃超疏水殼聚糖/多硼酸鈉基微納米涂層
論文來源：期刊
發(fā)表時(shí)間：2022年
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.
在這項(xiàng)工作中，通過兩步工藝制備了一種可持續(xù)的阻燃超疏水棉織物：首先用殼聚糖/聚硼酸鈉聚電解質(zhì)復(fù)合水溶液處理棉織物以獲得阻燃層，然后用聚二甲基硅氧烷處理(PDMS) 四氫呋喃溶液構(gòu)建超疏水層。具有微納米粗糙結(jié)構(gòu)的相分離殼聚糖被PDMS覆蓋，協(xié)同提高了棉織物的疏水性。阻燃性評(píng)價(jià)表明，處理后織物的極限氧指數(shù)值由18.2%提高到40.0%，放熱率峰值降低63.8%，總放熱量比處理后織物降低57.6%。對照樣品。增強(qiáng)的阻燃性歸因于凝聚相中優(yōu)異的炭化能力。處理后的織物還顯示出防粘、自清潔和油/水分離性能。這種不含任何 F、Cl、Br、P 元素的涂層處理被認(rèn)為是生產(chǎn)阻燃和超疏水棉織物的清潔方法。