Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (07): 31-38.doi: 10.13475/j.fzxb.20201202708

• Invited Column: New Flame Retardant Technology for Textile Materials • Previous Articles     Next Articles

Flame retardant and antibacterial treatments for cotton-viscose blended fabrics

ZHANG Jiaojiao1,2,3, LI Yuyang1,2,3, LIU Yun1,2,3, DONG Chaohong1,2,3(), ZHU Ping1,2,3   

  1. 1. College of Textiles & Clothing, Qingdao University, Qingdao, Shandong 266071, China
    2. Institute of Functional Textiles and Advanced Materials, Qingdao University, Qingdao, Shandong 266071, China
    3. State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, Shandong 266071, China
  • Received:2020-12-10 Revised:2021-04-24 Online:2021-07-15 Published:2021-07-22
  • Contact: DONG Chaohong E-mail:dongzhh11@163.com

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Abstract:

In order to obtain both flame retardant and antibacterial properties for textiles, the composite functional agent for cotton-viscose blended fabrics was synthesized from comb-like silicon-phosphor-nitrogen synergistic flame retardant-antibacterial agent. The treatment process of cotton-viscose blended fabrics was optimized through single factor experiment, and fabric structure and performance were analyzed using infrared spectrometer, vertical combustion instrument, limit oxygen index (LOI) tester, scanning electron microscope, energy dispersive X-ray spectrometer, thermogravimetric analysis, and so on.The results show that the optimal processing parameters are 500 g/L flame retardant antibacterial agent and 150 g/L 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), soaking at 50 ℃ for 40 min, two dip and two roll, pre-drying at 70 ℃ for 5 min, and curing at 130 ℃ for 150 s. The LOI value of the treated cotton-viscose blended fabrics was above 28%, and the after-flame time and after-glow time were both 0 s. The dense carbon layer with Si, P and N elements enriched on the surface of the fabrics after combustion was 40.16% at 800 ℃. The antibacterial rates of treated cotton-viscose blended fabrics againstEscherichia coli and Staphylococcus aureus were 99.05% and 95.52%, respectively, indicating good flame retardant and antibacterial property.

Key words: cotton-viscose blended fabrics, flame retardant finishing, antibacterial finishing, functional finishing, functional textiles

CLC Number: 

  • TS195.5

Fig.1

Equation of DSCFT react with cellulose"

Fig.2

Infrared spectrum of treated cotton-viscose blended fabrics"

Tab.1

Influence of DSCFT concentration on flame retardant property of cotton-viscose blended fabrics"

整理剂质量
浓度/(g·L-1) 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
300 4.62 24.3 7.69 0 —
350 6.71 25.2 6.22 0 —
400 9.02 25.6 8.81 0 14.4
450 11.57 25.7 7.97 0 —
500 13.80 26.3 0 0 12.1
550 16.25 26.5 0 0 12.8

Tab.2

Influence of PBTCA concentration on flame retardant property of cotton-viscose blended fabrics"

交联剂质量
浓度/(g·L-1) 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
0 14.94 27.2 7.45 0 -
50 15.58 28.0 0 0 10.5
100 16.77 28.1 0 0 24.0
150 16.93 28.5 0 0 13.0
200 17.63 28.8 0 0 13.0

Tab.3

Effect of treating time on flame retardant property of cotton-viscose blended fabrics"

整理
时间/min 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
10 17.12 27.2 0 0 10.3
20 18.12 28.2 0 0 12.4
30 18.98 28.2 0 0 12.5
40 19.18 28.7 0 0 12.6
50 24.82 29.0 0 0 13.0

Tab.4

Effect of treating temperature on flame retardant property of cotton-viscose blended fabrics"

整理
温度/℃ 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
20 20.10 27.6 0 0 14.3
30 20.43 27.7 0 0 12.6
40 21.01 28.0 0 0 12.4
50 21.89 28.2 0 0 11.6
60 23.51 28.3 0 0 13.9

Tab.5

Influence of drying temperature on flame retardant property of cotton-viscose blended fabrics"

预烘
温度/℃ 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
40 24.51 29.3 0 0 10.6
50 24.55 29.7 0 0 9.6
60 25.27 29.6 0 0 10.2
70 25.82 30.2 0 0 10.6
80 25.60 30.2 0 0 9.7

Tab.6

Effect of curing temperature on flame retardant property of cotton-viscose blended fabrics"

焙烘
温度/℃ 		质量增
加率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
120 20.13 29.3 0 0 13.0
130 21.84 29.5 0 0 11.2
140 21.15 29.7 0 0 17.1
150 21.14 29.1 0 0 14.0
160 20.07 29.2 0 0 12.9
170 19.77 29.1 0 0 13.7
180 20.26 29.1 0 0 14.9

Tab.7

Influence of drying time on flame retardant property of cotton-viscose blended fabrics"

预烘
时间/min 		质量增加
率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
0 25.99 29.1 0 0 13.5
5 25.71 29.2 0 0 8.3
10 25.69 28.9 0 0 13.0
15 25.49 29.2 0 0 10.7
20 24.27 29.2 0 0 11.7

Tab.8

Effect of curing time on flame retardant property of cotton-viscose blended fabrics"

焙烘
时间/s 		质量增加
率/% 		LOI
值/% 		续燃时
间/s 		阴燃时
间/s 		损毁
长度/cm
120 23.56 28.2 0 0 14.5
150 23.00 28.2 0 0 10.6
180 22.50 28.2 0 0 13.9
210 22.26 28.2 0 0 11.2
240 22.56 28.0 0 0 13.6

Fig.3

Combustion morphology of cotton-viscose blended fabrics (a) and DSCFT-treated cotton-viscose blended fabrics (b)"

Fig.4

EDX mapping of DSCFT-treated cotton-viscose blended fabrics before (a) and after (b) combustion"

Tab.9

Element distribution of DSCFT-treated cotton-viscose blended fabrics before and after combustion"

元素 含量/%
织物燃烧前 织物燃烧后
碳 33.25 44.32
氧 42.34 29.06
硅 2.27 3.94
磷 4.56 7.89
氮 3.80 5.46

Fig.5

TG curves (a) and DTG curves (b) of cotton-viscose blended fabrics and treated cotton-viscose blended fabrics"

Tab.10

Thermal stability data of cotton-viscose blended fabrics and treated cottonviscose blended fabrics under N2 atmosphere "

样品 T5%/
℃ 		T10%/
℃ 		Tmax1/
℃ 		Tmax2/
℃ 		Rmax/
(%·℃-1) 		800 ℃时
残炭量/%
整理前 220 286 339 - 1.23 12.16
整理后 196 238 263 286 0.74 40.16

Fig.6

Antibacterial effect of DSCFT agent. (a) Against E.coli; (b) Against S.aureus "

Fig.7

Antibacterial mechanism of treated cotton-viscose blended fabrics"

Fig.8

Breaking strength of fabrics at different concentrations"

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