State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China; Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, Jiangsu 215123, PR China.
Carbohydr Polym. 2017 Aug 15;170:133-139. doi: 10.1016/j.carbpol.2017.04.065. Epub 2017 Apr 26.
Bio-based and phosphorus-free coating was fabricated by layer-by-layer assembly method to obtain the flame retardant cotton fabric. For the first time, the modified cotton fabrics were prepared by utilizing positively charged polyethylenimine and negatively charged alginate together with subsequent crosslinking of barium, nickel and cobalt ions. Scanning electron microscopy and energy-dispersive X-ray demonstrated that the metal ions crosslinked coating was successfully constructed on the substrate. The thermal stability and flame retardancy were investigated by thermogravimetric analysis (TGA) and horizontal flame tests. TGA results showed that the degradation of the coated cotton fabrics were retarded at high temperature and the char residue of the cotton fabrics were improved after covered with the barium, nickel and cobalt ions crosslinked coatings. Furthermore, the fire resistance of cotton-Ba sample was enhanced significantly compared with the untreated sample, as evidenced by the obvious reduction (28%) of flame spread rate and complete char residue. Finally, the washing durability of coating on the fabric was enhanced after metal ions crosslinked with alginate based coating.
通过层层组装方法制备了基于生物且无磷的涂层，以获得阻燃棉织物。首次利用带正电荷的聚乙烯亚胺和带负电荷的海藻酸钠以及随后的钡、镍和钴离子交联，制备了改性棉织物。扫描电子显微镜和能谱分析表明，金属离子交联涂层成功地构建在基底上。通过热重分析（TGA）和水平火焰试验研究了热稳定性和阻燃性。TGA 结果表明，涂层棉织物在高温下的降解被延迟，并且在覆盖钡、镍和钴离子交联涂层后，棉织物的炭残留得到改善。此外，与未处理的样品相比，棉-Ba 样品的抗火性显著增强，火焰蔓延速率明显降低（28%），且完全形成炭残留。最后，经过海藻酸钠基涂层的金属离子交联后，织物上涂层的耐洗性得到增强。
