It is still a big challenge for textile industry in improving fire resistance and reducing melt dripping with minimal loss on the physical properties of polyethylene terephthalate (PET) fabrics. In this work, a highly-effective hyperbranched flame retardant (DT) was first synthesized by ester exchange without using any organic solvent. Then, the DT foam was prepared and blade coated on PET fabric to improve the fire performance. The prepared PET fabric with only 2.7% weight gain of DT was self-extinguished and did not produce any molten dripping during the vertical flammable test. The peak heat release rate and total heat release of the PET fabric sample with 19.4% DT were decreased by 42.0% and 57.1%, respectively compared with that of the control PET. Besides, the as-prepared PET fabric sample showed better physical properties such as breaking strength, vapor permeability, air permeability, antistatic property, and softness than the control PET fabric sample. The DT foam finishing process did not involve any organic solvent and consumed less water and energy compared with conventional fabric treatments. It is expected that this work provides a facile and eco-friendly strategy for fabricating flame retardant PET fabric with excellent comprehensive performances.

如何在最大限度降低聚对苯二甲酸乙二醇酯（PET）织物物理性能损失的情况下，提高阻燃性和减少熔滴，仍然是纺织工业面临的一大挑战。在这项工作中，首先在不使用任何有机溶剂的情况下通过酯交换合成了一种高效的超支化阻燃剂 (DT)。然后，制备 DT 泡沫并将刀片涂在 PET 织物上以提高防火性能。所制备的DT增重仅为2.7%的PET织物在垂直燃烧试验中具有自熄性，未产生任何熔融滴落。与对照PET相比，DT为19.4%的PET织物样品的峰值热释放率和总热释放分别降低了42.0%和57.1%。除了，所制备的PET织物样品显示出比对照PET织物样品更好的物理性能，例如断裂强度、透湿性、透气性、抗静电性和柔软性。与传统织物处理相比，DT 泡沫整理过程不涉及任何有机溶剂，消耗的水和能源更少。期望这项工作为制造具有优异综合性能的阻燃PET织物提供一种简便且环保的策略。