Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (04): 72-76.doi: 10.13475/j.fzxb.20170602605

• Dyeing and Finishig & Chemicals • Previous Articles     Next Articles

Softness treatment of ramie fibers by N-methyl-2-pyrrolidone

LI Mengzhen1, ZHANG Bin1,2(), YU Chongwen1,2   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Key Laboratory of Textile Science &Technology, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2017-06-08 Revised:2018-12-23 Online:2019-04-15 Published:2019-04-16
  • Contact: ZHANG Bin E-mail:zhangbin@dhu.edu.cn

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Abstract:

In order to improve the softness of ramie fibers, N-methyl-2-pyrrolidone(NMP)was used to treat them. The effects of NMP mass fraction, time and temperature on the mechanical properties and softness of ramie fibers were studied. Meanwhile, the ramie fibers were characterized by X-ray diffractometer, infrared spectrometer and scanning electron microscope. Results show that when the NMP mass fraction, treatment time or temperature increases, the elongation of ramie fibers increases, and the tensile strength decreases. When the NMP mass fraction or the time increases, the twisting number of ramie fiber increases first and then decreases. When temperature increases, the twisting number increases quickly and then keeps stable. The optimum treatment conditions are NMP mass fraction of 15%, time of 60 min and temperature of 80 ℃, the crystallinity of treated ramie fibers decreases from 80.37% to 70.19%, but the chemical groups remain unchanged, and cracks appear along the vertical lines on the surface of ramie fibers.

Key words: ramie fiber, N-methyl-2-pyrrolidone, softness treatment, softness, crystallinity

CLC Number: 

  • TS102.2

Fig.1

Effect of NMP mass fraction on tensile properties(a) and softness (b) of ramie fiber"

Fig.2

Effect of treatment time on tensile properties (a) and softness(b) of ramie fiber"

Fig.3

Effect of treatment temperature on tensile properties(a) and softness(b) of ramie fiber"

Fig.4

X-ray diffraction spectra of ramie fibers before and after treatment"

Fig.5

Infrared spectrum of ramie fibers before and after treatment"

Fig.6

SEM images of ramie fibers before(a) and after(b) treatment(×1 500)"

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