Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (09): 91-96.doi: 10.13475/j.fzxb.20180907606

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Influence of pretreatment process on superhydrophobic modification of wool/polyester fabric

GAO Jing(), WANG Lu   

  1. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2018-09-29 Revised:2019-04-06 Online:2019-09-15 Published:2019-09-23

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Abstract:

The surface of wool and polyester fibers in wool/polyester fabrics does not have enough chemical reactive sites, which lead to difficult chemical modification and also restrict the superhydrophobic performance of wool/polyester fabrics. Therefore, wool/polyester fabrics were irradiated with ultraviolet firstly, then hydrogen peroxide was adopted to pretreat wool/polyester fabrics, and silica was adopted to hydrophobically modify wool/polyester fabrics. The influence of superhydrophobic modification of cotton/polyester fabrics by pretreatment process were explored by the static contact angle test, scanning electron microscopy and wool fiber surface scale analysis. The results show that when fabrics are treated by UV irradiation and then oxidized by hydrogen peroxide, water repellent films of wool surfaces are eliminated by ultraviolet irradiation, and after hydrogen peroxide treatment, scale structure of wool surfaces is further damaged, wool surface exposes more chemical reaction sites, therefore, coverage of silicon particles on the fibers surface is improved to endut wool fabrics with superhydrophobic properties.

Key words: wool/polyester fabric, pretreatment, superhydrophobic modification, contact angle

CLC Number: 

  • TS195.6

Tab.1

Orthogonal factor and level table of fabrics pretreatment"

水平 A
H2O2用量/%		 B
紫外光功率/W		 C
辐射时间/min
1 1 15 5
2 3 100 10
3 5 500 15

Fig.1

Diagrammatic sketch of ultraviolet irradiation device"

Tab.2

Components and their dosage of different concentrations of hydrogen peroxide solutions"

H2O2
用量/%		 H2O2
体积/mL		 Na2CO3
质量/g		 Na2SiO3·9H2O
质量 /g		 H2O
体积/mL
1 1 0.2 0.7 100
3 3 0.2 0.7 100
5 5 0.2 0.7 100

Tab.3

Influence of different pretreatments on water contact angle"

试验号 因子 静态水
接触角yi/(°)
A B C 空白列
1 1 1 1 1 681.6
2 1 2 2 2 708.5
3 1 3 3 3 699.0
4 2 1 2 3 718.8
5 2 2 3 1 728.2
6 2 3 1 2 684.0
7 3 1 3 2 706.4
8 3 2 1 3 750.8
9 3 3 2 1 716.6
K1 2 089.1 2 106.8 2 116.4 2 126.4
K2 2 131.0 2 187.5 2 143.9 2 098.9
K3 2 173.8 2 099.6 2 133.6 2 168.6
R 84.7 87.9 17.2 42.2

Tab.4

Analysis of variance of factors influencing on hydrophobic modification"

方差来源 偏差平方和 自由度 F 显著性
A 153.9 2 6.586 ***
B 232.3 2 9.942 ***
C -59.5 2 -2.547
误差e 444 38

Fig.2

Wettability of wool/polyester fabric surface. (a) Physical photograph; (b) Static water contact angle of fabric"

Fig.3

Allw?rden reaction of wool in wool/polyester fabrics. (a) Untreated wool; (b) Vesicles of untreated wool;(c) Vesicles of wool irradiated by UV; (d) Vesicles of wool irradiated by UV and oxidized by hydrogen peroxide"

Fig.4

SEM images of wool surface. (a) Unpretreated wool(×1 000); (b)Wool irradiated by 100 W UV for 5 min(×1 000);(c) Wool oxidized by 5% hydrogen peroxide after irradiated by 100 W UV for 5 min(×2 000)"

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