Ultra washing durable flame retardant coating for cotton fabric by the covalent bonding and interface polymerization
writer：Peng Qi, Yuchun Li, Yuan Yao, Jun Sun, Lu Li, Jian Liu, Xiaoyu Gu, Hongfei Li, Sheng Zhang
keywords：阻燃, 洗滌耐久,棉織物
source：期刊
Issue time：2022年
Due to fire hazards and environmental concerns, considerable attention has been paid to the design of durable flame retardant fabrics. In this work, a formaldehyde-free flame retardant cotton fabric (Cotton-PEI/APP-TMC) with ultra washing durability was prepared via covalent bonding of ammonium polyphosphate (APP) and polyethyleneimine (PEI) followed by the interface polymerization between PEI and trimesoyl chloride (TMC). The prepared fabric exhibited excellent flame retardancy with a limiting oxygen index value (LOI) of 42.0 % and a damaged length of less than 40 mm in the vertical flammability test (VFT). Besides, the cotton-PEI/APP-TMC sample was not ignited in the 50 kW/m2 cone calorimeter test with a dramatic decrease in both the peak heat release rate and total heat release. Even after 300 washing cycles, the cotton-PEI/APP-TMC sample had an LOI value of 35.3 % and was still self-extinguishing in VFT. It was demonstrated that the interface polymerization between PEI and TMC stabilized the flame retardant coating and shielded the Na+ during washing cycles, which endowed the fabric with durable flame retardancy. It is expected this work paves a promising application prospect for the fabrication of bio-safe durable flame retardant cotton fabrics.
共價鍵合界面聚合的棉織物超耐洗阻燃涂層
由于火災隱患和環(huán)境問題，人們對耐用阻燃織物的設計給予了相當大的關注。在這項工作中，通過聚磷酸銨（APP）和聚乙烯亞胺（PEI）的共價鍵合，然后PEI和均苯三甲酰的界面聚合，制備了一種具有超耐洗性的無甲醛阻燃棉織物（Cotton-PEI/APP-TMC）。氯化物 (TMC)。制備的織物表現(xiàn)出優(yōu)異的阻燃性，極限氧指數(shù)值（LOI）為42.0%，垂直可燃性測試（VFT）的損傷長度小于40mm。此外，棉-PEI/APP-TMC 樣品在 50 kW/m 2錐形量熱儀測試，峰值放熱率和總放熱均顯著降低。即使經過 300 次洗滌循環(huán)，棉-PEI/APP-TMC 樣品的 LOI 值仍為 35.3%，并且在 VFT 中仍能自熄。結果表明，PEI 和 TMC 之間的界面聚合穩(wěn)定了阻燃涂層并在洗滌循環(huán)期間屏蔽了 Na +，從而賦予織物持久的阻燃性。預計這項工作為生物安全耐用阻燃棉織物的制造鋪平了廣闊的應用前景。