State Key Laboratory of Resource Insects, College of Sericulture Textile and Biomass Sciences, Southwest University, No.2 Tiansheng Street, Beibei, Chongqing 400715, PR China.
Institute of Bioorganic and Medicinal Chemistry, College of Chemistry and Chemical Engineering, Southwest University, No.2 Tiansheng Street, Beibei, Chongqing 400715, PR China.
Int J Biol Macromol. 2024 Mar;260(Pt 2):129543. doi: 10.1016/j.ijbiomac.2024.129543. Epub 2024 Jan 19.
A cationic, durable flame retardant for cotton fabrics, 6-(2-(dimethoxy phosphoryl)-2-(trimethyl ammonium)) methoxy-2-methoxy-polysaccharide ammonium phosphate (DTPAP), was synthesized. Its structure was verified by NMR and FTIR spectroscopy. According to the FTIR spectra and X-ray photoelectron spectroscopy (XPS), DTPAP formed P(=O)-O-C bonds with cellulose molecules and firmly grafted to cotton fabrics, giving the fabric a high durability. DTPAP-25-treated fabrics passed the vertical flame test (VFT), and the limiting oxygen index (LOI) was 43.9 %. After 50 laundering cycles (LCs), the DTPAP-25-treated fabrics had an LOI of 29.9 %, passed the VFT, and retained their flame retardancy. EDS data showed that, compared with engrafted cationic ammonium phosphate flame retardants, the DTPAP-treated fabrics contained fewer metal ions. Cone calorimetry data showed that DTPAP-25-treated fabrics did not display concentrated heat release. The results suggested that DTPAP exhibited a condensed-phase flame retardant mechanism, and the introduction of cations into the ammonium phosphate flame retardant reduced ion exchange, which improved the durability.
一种用于棉织物的阳离子、持久型阻燃剂，6-(2-(二甲氧基膦酰基)-2-(三甲基铵基))甲氧基-2-甲氧基-多聚糖铵磷酸盐(DTPAP)，被合成出来。其结构通过 NMR 和 FTIR 光谱进行了验证。根据 FTIR 光谱和 X 射线光电子能谱(XPS)，DTPAP 与纤维素分子形成了 P(=O)-O-C 键，并牢固地接枝到棉织物上，赋予织物高耐久性。DTPAP-25 处理的织物通过垂直火焰测试(VFT)，极限氧指数(LOI)为 43.9%。经过 50 次洗涤循环(LC)后，DTPAP-25 处理的织物 LOI 为 29.9%，通过了 VFT，并保持其阻燃性。EDS 数据表明，与接枝的阳离子磷酸铵阻燃剂相比，DTPAP 处理的织物含有较少的金属离子。锥形量热法数据表明，DTPAP-25 处理的织物没有显示出集中的热量释放。结果表明，DTPAP 表现出凝聚相阻燃机制，将阳离子引入到磷酸铵阻燃剂中减少了离子交换，从而提高了耐久性。
