Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (09): 95-100.doi: 10.13475/j.fzxb.20210906806

• Textile Engineering • Previous Articles     Next Articles

Preparation and properties of skin-core structure micro/nano fiber composite yarns

HU Chengye1, ZHOU Xinru1, FAN Mengjing1, HONG Jianhan1,2,3(), LIU Yongkun1, HAN Xiao1, ZHAO Xiaoman1   

  1. 1. College of Textile and Garment, Shaoxing University, Shaoxing, Zhejiang 312000, China
    2. Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing, Zhejiang 312000, China
    3. Key Laboratory of Flexible Devices for Intelligent Textile and Apparel, Soochow University, Suzhou, Jiangsu 215123, China
  • Received:2021-09-22 Revised:2022-01-07 Online:2022-09-15 Published:2022-09-26
  • Contact: HONG Jianhan E-mail:jhhong@usx.edu.cn

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Abstract:

In order to investigate the effect of spinning solution mass fraction on the structure and properties of skin-core structure micro/nano fiber composite yarn, a composite yarn with polyethylene terephthalate(PET) as core and polyamide 6(PA6) nanofiber as skin was prepared by the two-needle water bath electrospinning method. The morphology structure, thermal and mechanical properties of PET/PA6 composite yarns were characterized by scanning electron microscope, differential scanning calorimeter and universal material testing machine. The results revealed the relationships between the different mass fraction of PA6 spinning solution and the skin-core structure. The average diameter of nanofibers increased from (61.99±13.08) nm to (150.22±21.53) nm, and the crystallinity increased from 16.28% to 20.63% when the mass fraction of PA6 spinning solution increased from 10% to 20%. When the mass fraction of PA6 spinning solution was 20%, the crystallinity reached the crystallization range of the conventional PA6 fibers. Increasing the mass fraction of spinning solution was also found to improve the mechanical properties of composite yarn to some extent.

Key words: electrospinning, two-needle water bath method, micro/nano fiber composite yarn, polyethylene terephthalate, polyamide 6

CLC Number: 

  • TQ340.69

Fig.1

Schematic diagram of two-needle water bath electrospinning"

Fig.2

SEM images of cross-section and surface morphologies of micro/nano fiber composite yarns prepared at mass fraction of PA6 spinning solution. (a)Cross-section morphology;(b) 10%;(c) 12%;(d) 15%;(e) 18%;(f) 20%"

Tab.1

Viscosity and surface tension of spinning solution change under different mass fraction of PA6"

PA6质量分数/% 黏度/(mPa·s) 表面张力/(mN·m-1)
10 98.2 39.991±0.028
12 334.2 40.197±0.027
15 696.6 40.657±0.025
18 1 213.4 40.850±0.030
20 2 360.8 41.289±0.028

Fig.3

Diameter distribution diagram of PA6 nanofibers at different mass fraction"

Fig.4

Effect of mass fraction of PA6 on diameter of nanofibers"

Tab.2

Effect of PA6 mass fraction on coating rate and linear density of composite yarns"

PA6质量分数/% 包覆率/% 线密度/tex
10 23.11 34.20
12 25.16 34.77
15 38.66 38.52
18 42.37 39.55
20 43.48 39.86

Fig.5

DSC curves of PA6 nanofiber coating with different mass fraction"

Tab.3

Effect of PA6 mass fraction on mechanical properties of composite yarns"

PA6质量
分数/%		 断裂强
力/N		 断裂伸长
率/%		 断裂强度/
(cN·dtex-1)		 初始模量/
(cN·dtex-1)
10 18.32 45.75 5.36 14.81
12 17.99 47.16 5.17 14.94
15 19.22 43.47 4.99 14.71
18 19.17 45.17 4.85 14.04
20 17.94 42.65 4.50 13.78
芯纱 17.73 44.02 6.38 18.09

Tab.4

Effect of mass fraction of PA6 on mechanical properties of nanofiber coating"

PA6质量
分数/%		 断裂强
力/cN		 断裂伸长
率/%		 断裂强度/
(cN·dtex-1)		 初始模量/
(cN·dtex-1)
10 18.71 25.43 0.29 1.57
12 26.18 29.85 0.37 1.71
15 55.89 40.57 0.52 1.53
18 88.00 49.57 0.75 2.02
20 39.25 35.91 0.32 0.90
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