Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (01): 73-78.doi: 10.13475/j.fzxb.20180106806

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Influence of alkali treatment on wicking effect and strength of profiled polyester yarn

ZHANG Lin1, WU Hailiang1(), SHEN Yanqin1, MAO Ningtao1,2   

  1. 1. College of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. School of Design, University of Leeds, Leeds LS2 9JT, UK
  • Received:2018-01-30 Revised:2018-08-17 Online:2019-01-15 Published:2019-01-18
  • Contact: WU Hailiang E-mail:whl@xpu.edu.cn

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Abstract:

Aiming at the problem that NaOH could damage the structure of polyester fiber and affect the wicking effect, wettability, strength and elongation properties of profiled polyester fiber, and fast drying and cool properties, scanning electro microscopy was adopted to characterize the structure of the fiber before and after NaOH treatment. The influencing factors of wicking effect was analyzed and the influences of alkali concentration on wicking effect, wettability, strength and elongation properties were studied. The results show that the cross section of profiled polyester fiber is cross shaped. Four trenches along the longitudinal direction of the fiber play the capillary role and provide a channel for the migration of moisture. Therefore, the profiled polyester fiber and yarn have good wicking effect. Sodium hydroxide can effectively remove the oligomers from profiled polyester fibers, and the wicking effect of profiled polyester yarns is improved significantly when the concentration of alkali is about 4%. It is found that profiled polyester yarns treated by NaOH solution have good wettability. With the increase of the alkali concentration, the strength and elongation of profiled polyester yarns decrease, and the strength and elongation properties of the profiled polyester yarns are lost significantly while the alkali agent concentration is higher than 6%.

Key words: profiled polyester fiber, alkali treatment, wicking effect, strength of yarn

CLC Number: 

  • TS102.6

Fig.1

FT-IR of profiled polyester fiber and yarn"

Fig.2

Morphology structure of profiled polyester fiber(×5 000)."

Fig.3

Wicking height (a) and wicking rate (b) of profiled polyester yarn after alkali treatment"

Fig.4

Surface structure characteristics of profiledd polyester fiber treated with alkali of different concentrations(×10 000)."

Fig.5

Appearance of initial contact between yarn and water drop treated with alkali of different concentrations."

Fig.6

Contact angle between water and profiled polyester yarn before and after alkali treatment"

Fig.7

Chemical reaction of polyester fibers with NaOH solution"

Fig.8

Influence of alkali treatment on strength and elongation of yarn"

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