Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 7-12.doi: 10.13475/j.fzxb.20190404406

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of lignin/polyacrylonitrile composite fibers

SONG Le1,2,3, SHEN Lanping1(), HUANG Xianwen2, HENG Fangfang2, MA Hongbo2, OUYANG Qin2, CHEN Peng2, WANG Xuan3   

  1. 1. School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo,Zhejiang 315201, China
    3. Ningbo Key Laboratory of Advanced Textile Technology & Fashion CAD,Zhejiang Fashion Institute of Technology, Ningbo, Zhejiang 315211, China
  • Received:2019-04-16 Revised:2019-11-23 Online:2020-02-15 Published:2020-02-21
  • Contact: SHEN Lanping E-mail:shenlanping@126.com

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Abstract:

In order to reduce the preparation cost of existing polyacrylonitrile (PAN) fiber and achieve high value utilization of lignin, different proportions of lignin were used to prepare the lignin/PAN fibers employing the wet spinning process based on the understanding of viscosity of lignin/PAN blending solution, and the results from this work were used to identify the optimal spinning process. The structure and properties of the composite fibers were investigated by scanning electron microscopy, differential scanning calorimetry/thermal resynchronization analyzer, single fiber physical property analyzer, and UV-visible spectrophotometer. The results show that the lignin/PAN fiber with 35% lignin remains a uniform and dense structure, and its strength can reach 3.81 cN/dtex. After the addition of lignin, the synergistic effect of the two gives the composite fiber good thermal stability. The composite fiber has important potential application value in the fields of low cost carbon fiber and functional textile materials.

Key words: lignin/polyacrylonitrile composite fiber, wet spinning, spinnability, viscosity

CLC Number: 

  • TS102.6

Tab.1

Composition of lignin/PAN blend solutions"

样品
编号		 DMSO质
量/g		 木质素
质量/g		 PAN溶液
质量/g		 木质素相
对含量/%
PAN 11.1 0 100 0
L10 11.1 2.2 100 10
L20 11.1 5.0 100 20
L25 11.1 6.7 100 25
L30 11.1 8.6 100 30
L35 11.1 10.8 100 35
L40 11.1 13.3 100 40
L45 11.1 16.4 100 45
L50 11.1 20.0 100 50

Fig.1

Rotational viscosity of lignin/PAN blend solutions"

Fig.2

Photographs of PAN fiber and lignin/PAN composite fibers"

Fig.3

Ultraviolet absorption spectra of lignin/PAN blend solutions with different lignin contents"

Fig.4

Calibration plot of absorbance and lignin concentration at 290 nm"

Fig.5

Ultraviolet absorption spectra of composite fibers"

Fig.6

Actual content and yield of lignin in lignin/PAN composite fibers"

Fig.7

SEM images of PAN fiber and lignin/PAN composite fibers(×5 000)"

Tab.2

Basic parameters and properties of PAN fiber and lignin/PAN composite fibers"

纤维
类别		 密度/
(g·cm-3)		 纤维直径/
μm		 线密度/
dtex		 取向度/
%		 拉伸强度/
(cN·dtex-1)		 拉伸模量/
(cN·dtex-1)		 断裂伸长率/
%
PAN 1.18 13.25 1.63 74.09 2.50 72.62 19.89
L25 1.19 13.54 1.71 88.03 3.62 94.56 11.14
L35 1.19 13.22 1.63 88.03 3.81 90.38 12.11

Fig.8

DSC curves of lignin/PAN composite fibers in nitrogen"

Fig.9

TG curves of lignin/PAN composite fibers in nitrogen"

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