Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 106-112.doi: 10.13475/j.fzxb.20181100107

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and properties of layer-by-layer self-assembled flame retardant modified polyester fabrics

WANG Fanghe1, WANG Rui1(), WEI Lifei2, WANG Zhaoying1, ZHANG Anying1, WANG Deyi3   

  1. 1. School of Materials Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
    2. College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
    3. IMDEA Materials Institute, Madrid 28906, Spain
  • Received:2018-11-01 Revised:2019-08-18 Online:2019-11-15 Published:2019-11-26
  • Contact: WANG Rui E-mail:clywangrui@bift.edu.cn

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Abstract:

In order to solve the problem of droplet of flame retardant polyester fabrics, ionic monomers acrylic acid (AA) were grafted on the surface of flame-retardant polyester fabric in the presence of 1-hydroxycyclohexyl benzophenone as photoinitiator under the irradiation of ultraviolet light (UV). After that, γ-Aminopropyl triethoxysilane (KH-550) and sulfobutyl ether-β-cyclodextrin (SBE-β-CD) were designed as an anti-droplet system and flame retardant anti-drop polyester fabric was fabricated by layer-by-layer self-assembly on the grafted fabric surface. The morphologies, thermal properties and combustion properties of the fabrics before and after self-assembly were characterized. The results showed when the initiator mass fraction is 4%, the AA mass fraction is 12%, and the UV irradiation time is 10 min, the grafting rate of the flame retardant polyester is better, which is 5.08%. But the limiting oxygen index (LOI) decreases with the increase of grafting rate. The LOI of modified polyester fabric is 28% and the char residue increase when the number of assembled layers is 12. The vertical combustion test has no droplets, and the combustion performance of polyester fabrics are significantly improved.

Key words: UV light grafting, flame retardant polyester fabric, anti-droplet, flame retardant finishing, layer-by-layer self-assembly

CLC Number: 

  • TQ323.6

Fig.1

Mechanism of graft polymerization"

Fig.2

Curve of acrylic acid grafting rate with monomer mass fraction"

Fig.3

Curve of acrylic acid grafting rate with initiator mass fraction"

Fig.4

Curve of acrylic acid grafting rate with UV-light time"

Tab.1

Effect of grafting rate on LOI value"

KH-550质量分数/% SBE-β-CD质量分数/% 光照时间/min 样品接枝率/% LOI值/%
4 4 10 1.32 29
8 4 10 2.97 26
12 4 10 5.08 23
14 4 10 7.13 21
16 4 10 9.20 20

Fig.5

SEM images of pristine and modified flame retardant polyester fabric"

Fig.6

TG(a)and DTG(b)curves of pristine and modified flame retardant polyester fabric"

Tab.2

VCT and LOI results of pristine and modified flame retardant polyester fabric"

样品名称 续燃时间/s 阴燃时间/s 损毁长度/cm 熔滴数 是否点燃脱脂棉 LOI值/%
FRPET 0 0 9.6 4 否 35
g-FRPET 2 0 7.6 1 是 23
m-FRPET 0 1 8.0 0 否 28

Fig.7

Cone calorimetry curves of pristine and modified flame retardant polyester fabric. (a) Total heat release;(b) Heat release rate"

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