Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (06): 58-63.doi: 10.13475/j.fzxb.20180601306

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Effect of wool fabric protease modification on droplet spreading and color performance

AN Fangfang1, FANG Kuanjun1,2(), LIU Xiuming1, CAI Yuqing3, HAN Shuang1, YANG Haizhen1   

  1. 1. School of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
    2. Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao, Shandong 266071, China
    3. School of Textiles and Clothing, Qingdao University, Qingdao, Shandong 266071, China
  • Received:2018-06-01 Revised:2019-01-21 Online:2019-06-15 Published:2019-06-25
  • Contact: FANG Kuanjun E-mail:13808980221@163.com

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Abstract:

In order to investigate the influence of the surface performance of the modified wool fabrics on reactive dye ink droplets spreading and color properties, protease Savinase 16L was used for treating wool fabrics, and the spreading of ink droplets on fabrics and colorimetric values were observed. The contact angle measuring instrument, field emission scanning electron microscopy and X-ray photoelectron spectroscopy were adopted to analyze the wettability, morphology and chemical composition of wool fabrics. The results show that the surface scales of wool fibers are etched, the fiber structure becomes loose, and the wettability is improved after the protease modification. The spreading time and area of reactive dye droplets with different colors on the fabrics are significantly shorter and smaller than those of unmodified fabrics. Taking light red ink droplets as an example, the droplets spreading time and area on the protease treated fabrics decrease by 54.8% and 19.1%, respectively. In addition, more proteins are exposed to the wool fiber surface after the protease treatment, allowing more reactive dye molecules to covalently bond with the amino groups on the fiber surface, thereby improving the color depth and color saturation of wool fabric.

Key words: wool fabric, inkjet printing, protease modification, surface property, ink droplet spreading, color performance

CLC Number: 

  • TS194.4

Tab. 1

Effect of protease modification on ink droplets spreading time and area"

浸轧次数 酶处理时间/s 铺展时间/s 铺展面积/mm2
0 0 42.0 80.0
1 40 37.0 74.6
2 80 34.0 72.5
3 120 30.0 71.1
4 160 24.0 67.1
5 200 19.0 64.7

Tab. 2

Effect of protease modification on color performance of ink droplets"

浸轧
次数		 酶处理
时间/s		 L* a* b* C* h° K/S值
0 0 45.9 42.0 -6.0 42.5 351.9 5.5
1 40 42.4 43.1 -5.5 43.4 354.2 7.7
2 80 41.5 44.4 -5.3 44.5 355.1 9.2
3 120 40.3 45.3 -5.1 45.5 354.7 10.0
4 160 39.0 46.0 -4.7 46.6 355.4 10.8
5 200 38.6 47.3 -3.9 47.5 355.8 11.5

Tab. 3

Spreading and color parameters of ink droplets"

墨水 织物 铺展时间/s 铺展面积/mm2 L* a* b* C* h° K/S值
青色 未处理 35 69.5 62.0 -27.4 -15.6 31.5 209.6 4.4
处理后 16 50.0 50.8 -27.7 -22.2 35.5 218.7 12.5
品红 未处理 37 78.3 54.3 42.2 -6.9 42.8 350.8 4.8
处理后 14 57.2 34.8 49.1 -0.8 49.2 359.2 13.7
黄色 未处理 29 42.1 75.5 -4.7 47.1 47.4 95.7 3.8
处理后 14 37.5 68.7 0.4 64.1 54.1 89.6 9.4
黑色 未处理 35 42.4 41.1 5.2 0.4 5.3 251.7 5.6
处理后 15 33.9 23.0 2.0 -0.4 2.0 250.3 14.9

Tab. 4

Effect of protease modification on wetting properties of wool fabrics"

浸轧次数 酶处理时间/s 接触角/(°)
0 0 125.0
1 40 122.3
2 80 117.1
3 120 116.5
4 160 114.7
5 200 112.6

Fig.1

SEM images of wool fibers(× 2 000). (a) Untreated fibers; (b) Protease treated fibers"

Tab.5

Analysis of wool surface elements before and after protease treatment"

元素 结合能/eV 含量/%
改性前 改性后
C 285.0 65.9 64.1
O 531.8 20.4 20.2
N 398.4 5.2 8.6
S 164.0 2.3 1.4
Si 102.4 6.2 5.7
N与C元素比 - 7.9 13.4
O与C元素比 - 31.0 31.5
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