Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 100-105.doi: 10.13475/j.fzxb.20181004906

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Flame-retardant finishing of polyester fabrics by grafting phosphorus-nitrogen compounds

DING Fang, REN Xuehong()   

  1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-10-26 Revised:2019-11-06 Online:2020-03-15 Published:2020-03-27
  • Contact: REN Xuehong E-mail:xuehongr@hotmail.com

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Abstract:

In order to synchronously realize low toxicity and flame retardant properties of polyester fabrics, an environmentally friendly flame retardant, diethyl methacryloylphosphoramidate (DMPP) was synthesized through the reaction of diethyl chlorophosphate and methacrylamide. The synthesized flame retardant was grafted on PET fabrics by impregnation method. The influence of the quantity of the initiator potassium persulfate and impregnating time on the properties of the grafted fabrics were studied. The optimum finishing process was found to be as follows: the immersing time was 3 h, the initiator concentration was 3%. The tests showed that the flame retardant was grafted onto the surface of PET fabrics. After combustion, the char length of the grafted fabrics decreased from 30 cm to 7.7 cm, the limiting oxygen index increased to 28.7% and was still 27.4% after washing 10 times. The strength loss of the grafted fabrics was limited to 5% and met the apparel fabric standards.

Key words: phosphorus-nitrogen compound, flame-retardant finishing, polyester fabric, flame retardant, mechanical property

CLC Number: 

  • TS156

Fig.1

Synthesis route of DMPP"

Fig.2

Influence of initiator on weight gain rate of PET fabrics"

Fig.3

Influence of impregnating time on weight gain rate of PET fabrics"

Fig.4

FT-IR spectra of PET and grafted PET"

Fig.5

SEM images of PET (a) and grafted PET (b) fabrics(×5 000)"

Tab.1

Burning behavior of PET and grafted PET samples"

样品 续燃时间/s 阴燃时间/s 炭长/cm 质量增加率/% LOI值/% 是否熔滴
原涤纶织物 1.2 0.6 >30 — 19.9 是
15%DMPP整理涤纶织物 0.8 0.0 15.4 5.99 22.5 是
20%DMPP整理涤纶织物 0.3 0.0 15.2 7.55 23.5 是
25%DMPP整理涤纶织物 0.0 0.0 14.8 9.82 25.1 是
30%DMPP整理涤纶织物 0.0 0.0 11.3 11.74 27.5 否
35%DMPP整理涤纶织物 0.0 0.0 7.7 12.36 28.7 否

Fig.6

SEM images of burned PET and burned-grafted-PET fabrics(×5 000)"

Fig.7

Image of vertical flammability test of PET and grafted PET fabrics"

Fig.8

Degradation thermograms of PET and grafted PET fabrics"

Tab.2

Breaking strength of PET and grafted PET fabrics"

样品 断裂强力/N
经向 纬向
原涤纶织物 957.6±12.3 934.8±15.0
35%DMPP整理涤纶织物 724.0±17.6 703.9±14.4

Tab.3

Flame retardant properties of grafted PET fabrics after washing"

水洗次数 LOI值/%
0 28.7
5 28.0
10 27.4
25 26.8
50 26.1
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