Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (04): 102-109.doi: 10.13475/j.fzxb.20210304608

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Dyeing properties of laser modified polyester fabrics with disperse dyes

HE Yang1, ZHANG Ruiping1(), HE Yong2, FAN Aimin2   

  1. 1. School of Textile and Clothing, Nantong University, Nantong, Jiangsu 226019, China
    2. Jiangsu Tianyuan New Material Co., Ltd., Nantong, Jiangsu 226500, China
  • Received:2021-03-12 Revised:2022-01-21 Online:2022-04-15 Published:2022-04-20
  • Contact: ZHANG Ruiping E-mail:zhang.rp@ntu.edu.cn

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Abstract:

In order to make polyester fabrics have differential dyeing effect, CO2 laser was used to modify a polyester fabric. Taking the color depth value(K/S) as the index, the effects of laser treatment conditions such as power, speed and step distance on the dyeing properties of the polyester fabric were studied. The laser modification process was determined to be 5 W laser power, 150 mm/s laser speed and 0.2 mm step distance. The thermodynamic and kinetic characteristics of Disperse Red E-FB dyeing modified polyester fabric were analyzed, and the color fastness of the modified fabric was tested. The results show that the K/S value of modified polyester fabric dyed with Disperse Red E-FB was 17.81, 54.24% higher than that of untreated, and the soaping fastness and rubbing fastness of dyed fabrics were both above grade 4. Laser modification can cause etching on the fiber surface, and result in increase in oxygen content, decrease in crystallinity and slightly increase in grain size, with little effect on the dyeing affinity of Disperse Red E-FB for modified polyester fabric. The dyeing heat (exothermic) is increased and the dyeing entropy (negative value) decreased. The half dyeing time and diffusion activation energy of Disperse Red E-FB dyeing modified polyester fabric are both decreased, and the diffusion coefficient demonstrates an increas.

Key words: laser modification, dyeing property, dyeing kinetic, dyeing thermodynamic, polyester fabric, disperse dye

CLC Number: 

  • TS193

Fig.1

Influence of laser power on fabric K/S value"

Fig.2

Influence of laser speed on fabric K/S value"

Fig.3

Influence of laser step on fabric K/S value"

Fig.4

SEM images of polyester before(a) and after(b) laser treatment(×2 000)"

Tab.1

Element contents of polyester before and after laser treatment%"

织物 C相对含量 O相对含量 O与C相对
含量之比
未改性织物 80.0 20.0 25.0
改性织物 75.3 24.5 32.5

Fig.5

Breaking of ester bond in polyester molecule to produce many kinds of radicals"

Fig.6

Reaction of free radicals to produce CO and CO2"

Fig.7

Radicals react with oxygen and water"

Fig.8

X-ray diffraction curves of polyester fabric before(a) and after(b) modification"

Tab.2

Crystallite size of polyester fabric before and after laser modificationnm"

织物 (010)晶面 (110)晶面 (100)晶面
未改性织物 3.26 1.92 4.06
改性织物 3.50 2.02 4.04

Tab.3

"

织物 耐皂洗色牢度 耐摩擦色牢度
涤沾 棉沾 褪色 干摩 湿摩
未改性织物 4 4~5 4~5 5 4~5
改性织物 4 4 4~5 4~5 4~5

Fig.9

Standard curve of Disperse Red E-FB in DMF"

Fig.10

Adsorption isotherms of fabrics dyed with Disperse Red E-FB at different temperatures"

Tab.4

Thermodynamic parameters of dyeing polyester fabric with disperse dyes"

织物 -Δμ0/(kJ·mol-1) ΔH0/
(kJ·mol-1)		 ΔS0/
(J·mol·K-1)
100 ℃ 110 ℃
未改性织物 17.213 17.209 -17.359 -0.390
改性织物 17.628 17.522 -21.620 -10.700

Fig.11

Relationship curve between t/Ct and t of Disperse Red E-FB on fabric dyeing at different temperatures"

Tab.5

Kinetic parameters of dyeing polyester fabric with disperse dyes"

织物 温度/
℃		 C∞/
(mg·g-1)		 K/(min·
g·mg-1)		 t1/2/
min		 D/(10-13
m2·min-1)		 E/(kJ·
mol-1)
未改性 110 2.157 0.025 18.694 5.688 19.037
织物 130 5.845 0.012 13.900 7.650
改性 110 2.194 0.038 12.155 8.478 15.971
织物 130 6.105 0.017 9.778 10.875
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