Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (06): 94-99.doi: 10.13475/j.fzxb.20210507707

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Phosphorus/nitrogen-containing flame retardant for flame retardant finishing of polyester/cotton blended fabric

HUANG Yiting1,2, CHENG Xianwei1,2, GUAN Jinping1,2(), CHEN Guoqiang1,2   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215021, China
    2. National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215021, China
  • Received:2021-05-27 Revised:2022-03-24 Online:2022-06-15 Published:2022-07-15
  • Contact: GUAN Jinping E-mail:guanjinping@suda.edu.cn

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Abstract:

The development of flame retardant polyester/cotton blended fabrics is of great interest. In this study, ammonium phytate salt was synthesized using biomass phytic acid and urea, and applied to improve the flame retardancy of polyester/cotton blended fabric through pad-dry-cure process. The ammonium phytate salt was characterized with the Attenuated total reflection Flourier transformed infrared spectra. The surface morphology, thermal stability, heat release capacity, flame retardancy and mechanism of the treated polyester/cotton blended fabric were explored. The results showed that the treated polyester/cotton blended fabrics had good flame retardancy. The LOI value of treated fabrics was increased to 25.6%. During the vertical burning test, the treated fabrics could self-extinguish and had the reduced char length of 12 cm, meeting the B1 classification according to GB/T 17591—2006 "Flame retardant textiles". Besides, the treated fabrics showed higher thermal stability and lower heat release ability. Ammonium phytate salt improved the flame retardant properties of polyester/cotton blended fabrics through an intumescent flame retardant mechanism.

Key words: functional textile, polyester/cotton blended fabric, flame retardant finishing, phytic acid, scaffolding effect, intumescent flame retardant mechanism

CLC Number: 

  • TQ342.21

Fig.1

Synthetic route of ammonium phytate salt"

Fig.2

FT-IR spectra of flame retardant agent and polyester/cotton blended fabrics before and after flame retardant finishing"

Fig.3

Surface morphology of polyester/cotton blended fabrics before(a)and after(b)flame retardant finishing (×1 000)"

Tab.1

Weight gain, limiting oxygen index and damaged length of polyester/cotton blended fabrics treated with different concentrations of ammonium phytate salt"

质量浓度/
(g·L-1)		 质量增加
率/%		 极限氧指
数/%		 损毁长
度/cm
0 0 17.1 30.0
100 10.9 24.8 30.0
200 16.3 25.6 12.0
300 27.4 28.2 10.5
400 27.8 29.3 9.5

Fig.4

Vertical combustion photos of polyester/cotton blended fabrics before(a)and after (b)flame retardant finishing"

Fig.5

TG curves of polyester/cotton blended fabrics under air(a)and nitrogen(b)atmosphere"

Fig.6

Heat release rate curves of polyester/cotton blended fabrics before and after flame retardant finishing"

Tab.2

Heat release parameters of polyester/cotton blended fabric"

样品 pHRR/
(W·g-1)		 CHR/
(J·(g·K)-1)		 THR/
(kJ·g-1)		 残炭
率/%
阻燃整理前 441.1 236 19.9 0.4
阻燃整理后 425.7 194 8.9 12.2

Fig.7

SEM images of char residue of polyester/cotton blended fabrics before(a)and after(b) flame retardant finishing(×500)"

Tab.3

Physical and mechanical properties of polyester/cotton blended fabrics"

样品 断裂强
力/N		 断裂伸
长率/%		 抗弯长
度/mm		 白度/
%
阻燃整理前 605.3 13.4 16.3 85.1
阻燃整理后 579.2 17.9 17.4 77.2
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