In this study, flame retardant (FR) functional silk fabric was prepared by the facile adsorption of metal salts (ferrous, aluminum and titanium sulfate) at low concentration. This study tried to provide a good understanding on the FR ability and action of metal salts on silk fabric. The morphological structure and functional groups of silk fiber before and after treatment were studied. The thermal stability, smoke generation ability and FR ability of the treated silk were evaluated. The iron, aluminum and titanium salts endowed silk fabric with self-extinction effect at a concentration of 0.1, 0.5 and 1.0 g/L, respectively. The metal salts also showed good washing resistance on silk fabric; for example, the aluminum salt treated silk still reached self-extinction after 10 robust washings, which is attributed to the complexation capacity of silk macromolecule with metal ions. The thermal stability and char residues analyses suggested the condensed phase FR mechanism for the treated silk, and the good ability to promote char formation contributed to their FR functionality. This study suggests that certain metal salts are effective enough to serve as suitable alternative to toxic halogen-based chemicals for enhancing fire safety of silk textiles.

在这项研究中，阻燃剂（FR）功能的真丝织物是通过容易吸附低浓度的金属盐（亚铁，铝和硫酸钛）制备的。这项研究试图对金属织物上金属盐的阻燃能力和作用提供很好的理解。研究了蚕丝纤维处理前后的形态结构和官能团。评价了处理后的丝的热稳定性，发烟能力和FR能力。铁盐，铝盐和钛盐赋予丝织物以0.1、0.5和1.0 g / L的浓度自动消光的作用。金属盐在丝织物上也显示出良好的耐洗涤性。例如，经过十次强力洗涤后，经铝盐处理的丝绸仍能自动消光，这归因于丝绸大分子与金属离子的络合能力。热稳定性和炭渣残留分析表明，处理后的丝绸具有凝结相FR机理，促进炭形成的良好能力有助于其FR功能。这项研究表明，某些金属盐足以有效替代有毒卤素基化学药品，从而增强丝绸纺织品的防火性能。