Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (11): 113-118.doi: 10.13475/j.fzxb.20210805006

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and properties of flame retardant and superhydrophobic polyester/cotton fabrics

FANG Yinchun(), CHEN Lüxin, LI Junwei   

  1. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2021-08-11 Revised:2022-08-24 Online:2022-11-15 Published:2022-12-26

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Abstract:

In order to achieve the flame retardancy and super hydrophobicity for polyester/cotton fabrics simultaneously, bio-based chitosan (CS) and phytic acid (PA) were used to construct the flame retardant coating on the polyester/cotton fabric by using layer-by-layer assembly method. The fluorinated superhydrophobic finishing agent was used to treat the polyester/cotton fabrics, and limiting oxygen index (LOI), vertical burning test and water static contact angle were used to determine the flame retardancy and super hydrophobicity of treated polyester/cotton fabrics. Thermogravimetric analyzer was used to investigate the thermal stability of polyester/cotton fabrics, and scanning electron microscope (SEM) was used to view the morphology of polyester/cotton fabrics before and after treatment and their char residues after vertical burning. The results show that the LOI value of polyester/cotton fabric can reach 30.6% after flame retardant treatment by CS/PA coating, the static contact angle could reach over 150°, but the LOI would be reduced after superhydrophobic finishing. Polyester/cotton fabrics could achieve the flame retardancy and super hydrophobicity and a certain washing durability. The flame retardant and superhydrophobic treatment of polyester/cotton fabrics could improve their thermal stability at high temperature and promote the char formation. The CS/PA coating could act through intumescent flame-retardant action.

Key words: polyester/cotton fabrics, functional textiles, flame retardant treatment, super hydrophobic, phytic acid, chitosan

CLC Number: 

  • TS195.2

Fig.1

SEM images of polyester/cotton fabrics before and after treatment (×1 000). (a) Untreated; (b) Flame retardant; (c) Flame retardant and superhydrophobic treatment"

Tab.1

LOI values of polyester/cotton fabrics before and after washing and their vertical burning properties"

试样 增重率/
%		 LOI值/% 垂直燃烧性能 熔滴
现象		 弯曲
长度/
mm
炭长/cm
 续燃时间/s
 阴燃时间/s
洗前 洗1次 洗2次 洗4次 洗前 洗1次 洗4次 洗前 洗1次 洗4次 洗前
 洗1次
 洗4次
未处理 — 17.2 燃尽 10.0 0 有熔滴 24.7
阻燃处理 45.0 30.6 26.3 24.6 23.1 12 16.5 燃尽 0 0 26.1 0 0 0 无熔滴 56.5
阻燃超疏水处理 45.7 29.4 26.7 26.3 25.8 14 14.5 燃尽 0 0 20.4 0 0 0 无熔滴 38.3

Fig.2

Vertical burning photographs of polyester/cotton fabrics before and after treatment.(a)Untreated;(b)Flame retardant;(c) Flame retardant and superhydrophobic treatment"

Fig.3

Static contact angle of flame retardant and superhydrophobic polyester/cotton fabrics. (a) Flame retardant treatment; (b) Flame retardant and superhydrophobic treatment"

Fig.4

Static contact angle of flame retardant superhydrophobic polyester/cotton fabric after washing for different times. (a) After one time washing; (b)After two times washing; (c) After four times washing"

Fig.5

Thermogravimetric analysis of polyester/cotton fabrics. (a) TG curves; (b) DTG curves"

Tab.2

TG analysis data of polyester/cotton fabrics under nitrogen atmosphere"

试样 T-10%/
℃		 第1阶段 第2阶段 700 ℃残
炭率/%
T1max/
℃		 R1max/
(%·℃-1)		 T2max/
℃		 R2max/
(%·℃-1)
未处理 354 360 0.50 433 1.87 0.25
阻燃处理 281 306 0.48 439 1.57 13.7
阻燃超疏水处理 275 310 0.34 442 1.32 15.8

Fig.6

SEM images of char residues of polyester/cotton fabrics(×3 000). (a)Untreated; (b) Flame retardant; (c) Flame retardant and superhydrophobic treatment"

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