纺织学报 ›› 2025, Vol. 46 ›› Issue (03): 151-157.doi: 10.13475/j.fzxb.20240407001

• 染整工程 • 上一篇    下一篇

磷/氮/硅复配协效阻燃棉织物制备及其性能

廖喜林1,2,3, 曾媛1, 刘淑萍1,2,3, 李亮1,2,3, 李淑静1,2,3, 刘让同1,2,3()   

  1. 1.中原工学院, 河南 郑州 451191
    2.郑州市阻燃隔热耐火功能性服装及材料重点实验室, 河南 郑州 451191
    3.先进纺织装备技术省部共建协同创新中心, 河南 郑州 451191
  • 收稿日期:2024-04-28 修回日期:2024-08-15 出版日期:2025-03-15 发布日期:2025-04-16
  • 通讯作者: 刘让同(1966—),男,教授,博士。主要研究方向为纺织服装新材料、功能性服装的研发。E-mail:ranton@126.com
  • 作者简介:廖喜林(1992—),男,讲师,博士。主要研究方向为多功能阻燃纤维、纺织品及纳米纤维复合材料。
  • 基金资助:
    国家重点研发计划资助项目(2017YFB0309000);河南省科技攻关项目(242102320262)

Preparation of P/N/Si composite synergistic flame retardant cotton fabric and its performance

LIAO Xilin1,2,3, ZENG Yuan1, LIU Shuping1,2,3, LI Liang1,2,3, LI Shujing1,2,3, LIU Rangtong1,2,3()   

  1. 1. Zhongyuan University of Technology, Zhengzhou, Henan 451191, China
    2. Zhengzhou Key Laboratory of Flame Retardant, Heat Insulating and Fire Resistant Functional Clothing and Materials, Zhengzhou, Henan 451191, China
    3. Collaborative Innovation Center of Advanced Textile Equipment, Zhengzhou, Henan 451191, China;
  • Received:2024-04-28 Revised:2024-08-15 Published:2025-03-15 Online:2025-04-16

摘要: 为实现棉织物的高效阻燃,以聚乙烯亚胺(PEI)、植酸(PA)、纳米二氧化硅(SiO2)为原料,构建磷/氮/硅复配协效阻燃体系。采用喷涂法对棉织物进行阻燃整理,借助X射线能谱分析仪、垂直燃烧测试仪、扫描电子显微镜、极限氧指数测试仪、热重分析仪、微型量热仪和烟密度测试等分析了阻燃棉织物的微观形貌表面形貌、燃烧性能、阻燃性能、热释放性能、热稳定性及其阻燃机制。结果表明:PEI、PA、SiO2三者复配整理棉织物的阻燃效果最佳,整理后棉织物的极限氧指数(LOI)为30.3%,离火自熄,损毁长度降为7.2 cm;与预处理的棉织物相比,阻燃棉织物的热释放能力和总热释放量分别下降了85.0%和83.3%;PA先于棉织物吸热降解,抑制棉织物的初始热裂解;PEI、PA、SiO2通过协同作用形成石墨化结构的炭化层,可提高其稳定性并阻隔氧气及热量的传递,有效改善了棉织物的阻燃性能。

关键词: 棉织物, 阻燃性能, 喷涂法, 复配协效, 低温碳化, 阻燃机制

Abstract:

Objective Owing to its excellent biocompatibility, dyeing, softness, thermal and wet comfort, cotton fiber has been widely used in various fields, such as home textiles, clothing and industrial textiles. However, the limiting oxygen index of cotton fiber is about 18 and thus it is a combustible and flammable fiber. Doping flame-retardant in cotton fiber can improve its flame retardance. Treating cotton fabrics with nitrogen series, phosphorus series, boron series or silicon series alone would improve the flame resistance, but its effect is not satisfactory, and the cost is high. This research aims to achieve synergistic improvement in flame retardance by treating the cotton fabric with these flame retardants together.

Method Polyethyleneimine (PEI), phytic acid (PA) and nano-silica (SiO2) were used as raw materials to construct a P/N/Si-modified composite for synergistic improvement in the flame retardancy. The surface morphology, thermal stability, heat release property, flame retardant property and flame-retardant mechanism of the treated cotton fabric were analyzed by scanning electron microscopy (SEM), vertical combustion test, limiting oxygen index test, thermogravimetric analysis, microcalorimetry and smoke density.

Results According to the FT-IR spectra and SEM image, N, P and Si elements exist on the fiber surface of PEI/PA/SiO2-modified cotton fabric. The initial degradation temperature (T5%) of PEI/PA/SiO2-modified cotton fabric was 97 ℃, and the decomposition rate reached a maximum at 288 ℃. Compared with raw cotton fabric, the initial degradation temperature was significantly reduced, and the char residue content increased to 38.54%, indicating that the composite flame retardant can successfully slow down the thermal decomposition of cotton fabric. The subsequent burning time, smoldering time and damage length of PEI/PA/SiO2-modified cotton fibers were significantly reduced, and the LOI values reached 30.3%. This indicates that the synergistic flame retardancy of PEI, PA and SiO2, in which the respective attributes are integrated, can improve the flame retardancy of the fabric. The prepared fabric satisfied the related standard. Compared with pure cotton fabric, peak heat release rate (pHRR), heat release capacity (HRC) and total heat release (THR) of PEI/PA/SiO2-modified cotton fabric decreased by 84.2%, 85.0% and 83.3%, respectively, indicating it has high carbon formation efficiency and low the volume of gas generation in the thermal decomposition process. The smoke production of PEI/PA/SiO2-modified cotton fiber was decreased and stable, which can effectively reduce the possibility of suffocation death in the fire. The smoke release of PEI/PA/SiO2-modified cotton fabric was the least and the most stable among all samples, which indicates that PEI/PA/SiO2-modified cotton fabric can not only effectively improve the flame-retardant performance of cotton fabric, but also reduce the release rate and release amount of smoke during the combustion process. Compared with the raw cotton fiber, the warp breaking strength and weft breaking strength of PEI/PA/SiO2-modified cotton fabric decreased by 14.8% and 14.1%, respectively.

Conclusion The results showed that PEI/PA/SiO2-modified cotton fabric can promote the catalytic carbon formation of cotton fiber at low temperature, reduce the amount of smoke release, and form a highly graphitized carbon layer on the fiber surface to isolate the contact between combustible gas and fiber, and thus achieve satisfactory flame retardant effect. PEI/PA/SiO2-modified cotton fabric shows significantly better flame retardance performance than PEI, PA or PEI/PA-modified samples and meets the standard of decorative fabric flame retardant B1 requirements. Besides, PEI/PA/SiO2-modified cotton fabric also improves the mechanical properties of cotton fabric by decreasing the damage of strong acidity from PA.

Key words: cotton fabric, flame retardancy, spraying method, composite synergistic effect, carbonization at low temperature, flame retardant mechanism

中图分类号: 

  • TS193.5

图1

预处理和不同阻燃整理后棉织物的红外光谱图"

图2

不同整理棉织物样品的微观形貌及PEI/PA/SiO2整理样品的表面元素图"

图3

不同阻燃整理样品的TG和DTG曲线"

表1

整理前后棉织物的LOI值及垂直燃烧结果"

样品 增重
率/%
LOI值
/%
损毁
长度/cm
续燃时
间/s
阴燃
时间/s
预处理 17.5 30.0 15.0 26.0
PEI整理 6.3 18.1 30.0 13.0 8.0
PA整理 7.8 19.7 30.0 10.0 0
PEI/PA整理 14.3 25.3 9.2 3.4 0
PEI/PA/SiO2整理 17.8 30.3 7.2 2.0 0

图4

不同阻燃整理棉织物的垂直燃烧照片"

表2

不同阻燃整理棉织物的微型燃烧性能参数"

样品 HRC/
(J·g-1·K-1)
pHRR/
(W·g-1)
THR/
(kJ·g-1)
预处理 240 229.7 12.7
PEI整理 196 189.4 10.5
PA整理 122 120.2 6.4
PEI/PA整理 97 93.7 4.8
PEI/PA/SiO2整理 36 36.4 2.1

图5

不同阻燃整理样品的热释放速率曲线"

图6

不同阻燃整理棉织物的烟密度曲线"

图7

不同阻燃整理棉织物的残炭SEM照片"

表3

不同阻燃整理棉织物的经向和纬向断裂强力"

样品 断裂强力/N
经向 纬向
预处理 290.8 276.4
PEI整理 271.6 252.8
PA整理 197.4 191.8
PEI/PA整理 244.7 226.2
PEI/PA/SiO2整理 247.7 237.1
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