Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (07): 90-96.doi: 10.13475/j.fzxb.20210601008

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and flame retardant properties of environmental biomass based flame retardant PD

ZHANG Guangzhi, FANG Jin()   

  1. School of Textiles and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2021-06-01 Revised:2022-03-31 Online:2022-07-15 Published:2022-07-29
  • Contact: FANG Jin E-mail:506759952@qq.com

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Abstract:

In order to improve flame retardancy and washability of pure cotton fabrics, a halogen-free environment-friendly durable flame retardant PD was synthesized with biomass phytic acid and dicyandiamide, which was applied to the flame retardant finishing of a cotton fabric. The chemical structure and elemental composition of flame retardant PD were characterized by Fourier transform infrared spectrometer and X-ray energy spectrometer, and the surface morphology, thermal stability, flame retardancy and washability of the treated fabric were investigated. The results show that flame retardant PD is a multi-active phosphorus-nitrogen flame retardant; the mass fraction of flame retardant PD is 35% in the flame retardant finishing of cotton fabric. The residual carbon amount of PD flame retardant treatment sample is 13.32% at 800 ℃ pyrolysis (nitrogen atmosphere), and the fabric damage length of vertical combustion is 4.5 cm. The LOI value of the flame retardant fabric reaches 43.6%, and it can still reach 29.1% after 40 times of standard washing. It demonstrates that a biomass environment-friendly flame retardant PD offers excellent flame retardancy and washability.

Key words: biomass flame retardant, flame retardant finishing, cotton fabric, functional textiles, flame retardancy, washability

CLC Number: 

  • TS195.2

Fig.1

Reaction formula for synthesis of flame retardant PD"

Fig.2

Reaction of flame retardant PD with cotton fiber"

Fig.3

FT-IR spectra of flame retardant PD,phytic acid and dicyandiamide"

Fig.4

SEM images of cotton fabrics before(a) and after(b)flame retardant finishing"

Fig.5

XPS patterns of cotton fabrics before and after flame retardant finishing"

Tab.1

Analysis of surface elements of cotton fabrics before and after flame retardant finishing"

样品 质量分数/%
O C N P
原样 30.77 61.73 — —
PD处理样 27.19 57.54 7.76 2.11

Fig.6

TG analysis curves of pure cotton fabric before and after PD retardant finishing under air (a) and nitrogen (b) atmosphere"

Fig.7

FT-IR spectra of pure cotton fabrics before and after retardant finishing"

Fig.8

Vertical flammability test photos of pure cotton fabrics before and after retardant finishing.(a)Original sample; (b)DCD treated samples;(c)PA treated samples;(d)PD treated samples"

Tab.2

Flammability of pure cotton fabrics before and after retardant finishing"

样品 续燃时间/s 阴燃时间/s 炭长/cm LOI值/%
原样 — — 烧尽 18.3
DCD处理样 — — 烧尽 18.5
PA处理样 0 0 6.7 40.5
PD处理样 0 0 4.5 43.6

Tab.3

Washability of PD treated sample"

样品水洗次数 LOI值/%
原样 PD处理样
0 18.3 43.6
10 — 31.7
20 — 30.3
30 — 29.8
40 — 29.1

Fig.9

SEM images of residues of original sample(a) and PD treated sample(b)(×5 000)"

Tab.4

EDS of residues of original sample and PD treated sample"

样品 质量分数/%
C N O P
原样残渣 57.11 0 42.89 0
PD处理样残渣 64.54 4.09 22.28 9.09

Tab.5

Whiteness and breaking strength of original sample and PD treated sample"

样品 白度/% 经向断裂强力/N
原样 83.3 492
PD处理样 72.3 453
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