College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China; Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China.
College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China; Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China.
Carbohydr Polym. 2017 Sep 15;172:275-283. doi: 10.1016/j.carbpol.2017.05.054. Epub 2017 May 24.
Cotton fabrics are treated with a synthetic non-halogenated organophosphorus flame retardant by UV photoinitiated thiol-ene click chemistry. Thiol reactive precursors on cotton surface were prepared by 3-Mercaptopropyltriethoxysilane. The flame retardant property has been tested with different concentrations of flame retardant treatment (i.e., wt 2%, 5%, and 8%) by limited oxygen index (LOI) and vertical burning tests and maintained after 30 washing cycles, which was improved with concentration increases. Thermogravimetric analysis showed that the treatment greatly enhanced the char forming ability of cellulose and the highest residue was left as much as 48.1% char in nitrogen and 19.8% char in air after heating to 600°C, which obviously more than those of untreated fabric. Scanning electronic microscopy (SEM) revealed that the weave structure and fiber shape in all treated fabrics were preserved. These results demonstrate that UV photoinitiated thiol-ene click chemistry is a facile method for imparting cotton fabric with durable flame-retardant properties.
棉织物采用紫外光引发硫醇-烯点击化学的合成非卤化有机磷阻燃剂进行处理。棉织物表面的硫醇反应性前体由 3-巯丙基三乙氧基硅烷制备。通过极限氧指数（LOI）和垂直燃烧试验测试了不同阻燃剂处理浓度（即 wt 2%、5%和 8%）的阻燃性能，且在 30 次洗涤循环后仍能保持，随着浓度的增加，阻燃性能得到提高。热重分析表明，处理大大增强了纤维素的成炭能力，在加热至 600°C 时，在氮气中最高残留 48.1%的炭，在空气中最高残留 19.8%的炭，明显高于未处理织物。扫描电子显微镜（SEM）显示，所有处理过的织物的织物结构和纤维形状都得以保留。这些结果表明，紫外光引发硫醇-烯点击化学是赋予棉织物持久阻燃性能的一种简便方法。
