Self-crosslinking phosphorus-containing durable flame retardants for cotton fabrics

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2024-08-14 DOI:10.1016/j.polymdegradstab.2024.110957

Hao Zhou, Mengxiao Liang, Yonghua Lu, Hejun Li, Tian Li, Guangxian Zhang

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Abstract

The phosphorus-containing flame retardant that can enter the interior of cotton fiber and has self-crosslinking ability was designed and synthesized. The flame retardant contains two components, 2-(1-(dimethoxy phosphoryl)-2,5, 8-Triazectridecyl) phosphonate starch (PTPS) and 4-(hydroxymethyl)-10-((3-((5-(hydroxymethyl)-10-((3-((tris(hydroxymethyl)phosphonio)methyl)ureido)methyl)-2,6,8,12,14,18-hexaaza-4,10,16-Triphosphanonadecane (BPTP). The structure of PTPS and BPTP were detected by NMR and FTIR, and the results showed that the synthesis of PTPS and BPTP was successful. During the treatment, cellulose was first endowed with -NH groups. Then PTPS molecule and BPTP molecule were grafted onto cellulose through the reaction of P-CH₂-OH groups and -NH groups. After 50 laundering cycles (NFPA2112-2012 standard), the limiting oxygen indexes (LOIs) of the fabrics treated with 35 wt% CFN-PB and 30 wt% CFN-PB were 28.80 % and 27.30 %, respectively, and passed the vertical flame test (VFT). Compared with the raw cotton, the peak heat release rate (PHRR), the total heat rate (THR) and the flame growth rate (FGR) of the CNF-PB treatment fabric were reduced by 62.90%, 29.43% and 62.91% respectively. These indicate that the flame retardant PB could be firmly fixed on the fibers and show good flame retardancy durability. In the VFT, and cone calorimetry test, the CFN-PB treated fabric showed the condensed phase flame retardant mechanism.

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用于棉织物的自交联含磷耐久阻燃剂

设计并合成了可进入棉纤维内部并具有自交联能力的含磷阻燃剂。该阻燃剂包含两种成分：2-（1-（二甲氧基磷酰）-2,5、8-三氮杂十三烷基）膦酸酯淀粉（PTPS）和 4-（羟甲基）-10-（（3-（（5-（羟甲基）-10-（（3-（（三（羟甲基）膦酸）甲基）脲基）甲基）-2,6,8,12,14,18-六氮杂-4,10,16-三膦酸十六烷（BPTP））。通过核磁共振和傅立叶变换红外光谱检测了 PTPS 和 BPTP 的结构，结果表明 PTPS 和 BPTP 的合成是成功的。在处理过程中，纤维素首先被赋予 -NH 基团。然后通过 P-CH2-OH 基团和 -NH 基团的反应将 PTPS 分子和 BPTP 分子接枝到纤维素上。经过 50 次洗涤（NFPA2112-2012 标准）后，35 wt% CFN-PB 和 30 wt% CFN-PB 处理织物的极限氧指数（LOIs）分别为 28.80 % 和 27.30 %，并通过了垂直燃烧测试（VFT）。与原棉相比，CNF-PB 处理织物的峰值放热率（PHRR）、总热率（THR）和火焰增长率（FGR）分别降低了 62.90%、29.43% 和 62.91%。这表明阻燃剂 PB 能牢固地固定在纤维上，具有良好的阻燃耐久性。在 VFT 和锥形量热试验中，CFN-PB 处理织物显示出凝聚相阻燃机理。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.