writer：Feng Chen
keywords：Flame retardancy，Cotton fabric，Phytic acid，Lentinan，Durability
source：期刊
Issue time：2023年

As the most widely used natural fabric, cotton fabric is highly flammable with serious fire hazard concerns. The use of biomass materials to impart flame resistance to fabrics is always a hot topic of interest. In this work, a novel durable flame retardant cotton fabric (Cotton-APA/LNT) was fabricated by successively covalent bonding ammonium phytate (APA) and lentinan (LNT). The Cotton-APA/LNT fabric sample had a highly limiting oxygen index (LOI) value of 51.5 % and was self-extinguished in the vertical burning test (VBT) at 18.0 % weight gain. The peak heat release rate and total heat release values were decreased by 91.5 % and 46.0 %, respectively compared with those of the control cotton. Besides, after 50 laundering cycles (LCs), the fabric was still self-extinguished in the VBT with an LOI value of 34.2 %. APA fully strengthened the role of acid source by the presence of LNT. The constructed LNT outer layer showed comprehensive improvements in thermostability, flame retardancy, smoke suppression, durability, and breaking force. Specifically, the Cotton-APA/LNT sample had a higher LOI value (↑4.3 %), lower total heat release (↓23.8 %), lower total smoke production (↓29.1 %), higher thermostability (↑27 °C

under air), better char formation ability (↑2.0 % under air), higher durability (self-extinguished in the VBT after 50 LCs), and higher breaking force (↑32.5 % in the warp direction and ↑33.9 % in the weft direction) compared with those of Cotton-APA sample. This work has proposed an advanced approach for fabricating eco-friendly durable fire-safety cotton fabrics.

作为应用最广泛的天然织物，棉布具有高度易燃性，存在严重的火灾隐患。使用生物质材料赋予织物阻燃性一直是人们感兴趣的热门话题。本工作通过连续共价键合植酸酶（APA）和香菇多糖（LNT）制备了一种新型耐用阻燃棉织物（cotton APA/LNT）。棉APA/LNT织物样品具有51.5%的高极限氧指数（LOI）值，并且在重量增加18.0%的垂直燃烧试验（VBT）中自熄灭。与对照棉布相比，棉布的峰值放热率和总放热值分别降低了91.5%和46.0%。此外，经过50次洗涤循环（LC）后，织物在VBT中仍然是自熄灭的，LOI值为34.2%。APA通过LNT的存在充分强化了酸源的作用。所构建的LNT外层在热稳定性、阻燃性和热稳定性方面表现出全面的改善，