Durable Flame-retardant Finishing of Cotton with a Reactive Phosphorus-based Environmental Flame Retardant

ABSTRACT

A mannitol (MNT) – based reactive halogen-free flame retardant, FR-MNT, was synthesized and used for the flame-retardant finishing of cotton. FR-MNT was covalently grafted onto cotton fiber through -P = O(O⁻NH₄⁺) groups, which endowed cotton fabric superior flame retardancy. Phosphorous acid was used instead of all phosphoric acid for esterification with mannitol, which reduced the amount of the -P = O(O⁻NH₄⁺) groups, thus reducing the effect of metal ions on the flame-retardant fabric during soaping. Vertical combustion and LOI tests showed that treated cotton fabrics had excellent washing resistance. The thermal stability and combustion behavior of cotton fabric were evaluated by thermogravimetry (TG) and cone calorimetry tests. The mechanical properties of cotton fabrics changed only slightly after flame-retardant treatment.

摘要

合成了一种基于甘露醇 (MNT) 的反应性无卤阻燃剂FR-MNT, 并将其用于棉的阻燃整理. FR-MNT通过-P=O (O⁻NH₄⁺)基团共价接枝到棉纤维上, 赋予棉织物优越的阻燃性能. 使用亚磷酸而不是全部用磷酸与甘露醇进行酯化反应, 减少了-P=O (O⁻NH₄⁺) 基团的数量, 从而减少了皂洗过程中金属离子对阻燃织物的影响. 垂直燃烧和LOI测试表明, 处理后的棉织物具有优异的耐洗性. 采用热重法 (TG) 和锥形量热法对棉织物的热稳定性和燃烧性能进行了评价. 经过阻燃处理后, 棉织物的力学性能变化不大.

KEYWORDS:

• Cotton fiber
• flame retardant
• phosphorus-based
• environmental
• durability
• grafting

关键词:

• 棉纤维
• 阻燃剂
• 磷基
• 环境友好的
• 耐久性
• 接枝

Acknowledgments

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Disclosure statement

No potential conflict of interest was reported by the author(s).