Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 26-31.doi: 10.13475/j.fzxb.20180907307

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polyamide-based magnetic fibers

LI Changling1, WANG Wencong1, HUA Dong2, ZHOU Jianping2, KAN Jianxing2, WANG Hongbo1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Jiangsu Textile Research Institute Co., Ltd., Wuxi, Jiangsu 214024, China
  • Received:2018-09-28 Revised:2019-06-13 Online:2019-11-15 Published:2019-11-26
  • Contact: WANG Hongbo E-mail:wxwanghb@163.com

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Abstract:

In order to meet the market demand for health-care textiles, polyamide-based magnetic fibers were successfully prepared by adding magnetic materials into polyamide spinning melt. The Fourier transform infrared spectrometry, X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, differential scanning calorimetry, and tensile strength tester were carried out to analyze the chemical structure, crystal structure, morphology and various properties of the magnetic fibers. The results show that the ferrite magnetic powders are uniformly dispersed in nylon-based magnetic fibers; the magnetic powder content does not have much influence on the melting point of the nylon fiber; the breaking strength decreases with the increase of the magnetic powder content, but even if the magnetic powder content is up to 25%, the strength of the fiber is still 2.50 cN/dtex, which can meet the weaving requirements; and three different sizes of knitted fabrics were woven with nylon-based magnetic fibers, the three kinds of fabric have a magnetic flux density between 0.02 mT and 0.1 mT, and the magnetic flux density of the fabric increases with the content of the magnetic powder.

Key words: polyamide, magnetic powder, magnetic fiber, magnetic flux density

CLC Number: 

  • TS151

Tab.1

Process parameters of magnetic fabric"

工艺编号 织物编号 组织结构 纱线配置 纱线根数 机器型号
F-1 1# 100%的纤维MPA-0
2# 平针组织 100%的纤维MPA-15 1 SM8-TOP2 MP2
3# 100%的纤维MPA-20
4# 100%的纤维MPA-25
F-2 5# 50%的纤维MPA-0+50%的氨纶包芯纱
6# 添纱组织 50%的纤维MPA-15+50%的氨纶包芯纱 1 SM8-TOP2 MP2
7# 50%的纤维MPA-20+50%的氨纶包芯纱
8# 50%的纤维MPA-25+50%的氨纶包芯纱
F-3 9# 100%的纤维MPA-0
10# 平针组织 100%的纤维MPA-15 4 台车
11# 100%的纤维MPA-20
12# 100%的纤维MPA-25

Fig.1

FT-IR spectra of fibers"

Fig.2

X-ray diffraction patterns of fibers"

Fig.3

SEM images of four fibers. (a) MPA-0 cross-sectional image; (b) MPA-15 cross-sectional image; (c) MPA-20 cross-sectional image; (d) MPA-25 cross-sectional image; (e) MPA-0 surface image; (f) MPA-15 surface image; (g) MPA-20 surface image; (h) MPA-25 surface image"

Fig.4

EDS curve of fibers. (a) MPA-0 cross-sectional image; (b) MPA-0 surface image; (c) MPA-15 cross-sectional image; (d) MPA-15 surface image; (e) MPA-20 cross-sectional image; (f) MPA-20 surface image; (g) MPA-25 cross-sectional image; (h) MPA-25 surface image"

Fig.5

DSC curves of fibers"

Tab.2

Thermal properties and crystallinity of nylon fiber with different magnetic"

试样 熔点/℃ 热焓/(J·g-1) 结晶度/%
MPA-0 206.63 60.14 26.15
MPA-15 207.24 52.98 23.03
MPA-20 206.82 49.51 21.53
MPA-25 206.63 47.09 20.47

Fig.6

TGA curves of fibers"

Tab.3

Mechanical properties of fibers"

试样 断裂强度/
(cN·dtex-1)		 强度
保持率/%		 断裂
伸长率/%		 断裂伸长率
保持率/%
MPA-0 3.64 100.00 77.01 100.00
MPA-15 3.16 86.81 63.82 82.87
MPA-20 2.93 80.49 61.80 80.25
MPA-25 2.50 68.68 59.01 76.62

Tab.4

Magnetic flux density of fabrics"

织物编号 磁粉质量分数/% 磁感应强度/mT 磁感应强度增长率/%
F-1 15 0.050 —
20 0.055 10.10
25 0.059 18.96
F-2 15 0.028 —
20 0.034 22.17
25 0.041 46.72
F-3 15 0.051 —
20 0.059 16.46
25 0.093 83.52
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