Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 110-115.doi: 10.13475/j.fzxb.20210707307

• Textile Engineering • Previous Articles     Next Articles

Continuous preparation and application of polyester/polyamide 6 nanofiber coated yarns

ZHOU Xiaoya1,2, MA Dinghai3, HU Chengye1,2, HONG Jianhan1,2,4, LIU Yongkun1,2, HAN Xiao1,2(), YAN Tao4   

  1. 1. School of Textile and Apparel, Shaoxing University, Shaoxing, Zhejiang 312000, China
    2. Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing, Zhejiang 312000, China
    3. Shaoxing Yuhang Textile Co., Ltd., Shaoxing, Zhejiang 312030, China
    4. Key Laboratory of Flexible Devices for Intelligent Textile and Apparel, Suzhou, Jiangsu 215123, China
  • Received:2021-07-24 Revised:2021-11-29 Online:2022-02-15 Published:2022-03-15
  • Contact: HAN Xiao E-mail:hanxiao@usx.edu.cn

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Abstract:

In order to prepare the substrate material of ammonia sensor with both mechanical and electrical properties, nanofiber coated yarns (NCY) with polyester industrial yarn as core and polyamide 6 nanofiber as skin was continuously prepared by a water bath electrostatic spinning method, and conductive treatment was carried out by in-situ polymerization to prepare conductive nanofiber coated yarns (NCY/PPy) with polypyrrole on the surface. The surface morphology and chemical structure of NCY and NCY/PPy were analyzed by means of scanning electron microscope and Fourier transform infrared spectrometer. Meanwhile, the conductivity, mechanical properties and ammonia sensitivity of NCY/PPy were studied. The results show that NCY has an extremely high specific surface area. After conducting treatment, the loaded polypyrrole does not block the gap between the fibers, and the nanofiber coating still maintains the porous network structure, and when the polypyrrole is 0.07 mol/L, the conductivity of NCY/PPy is 7.19×10-2 S/cm. Nano-structured conductive layer with high specific surface area is beneficial to improve the sensitivity of gas sensor to ammonia.

Key words: water bath electrospinning, nanofiber coated yarn, polypyrrole, in situ polymerization, ammonia sensor

CLC Number: 

  • TQ340.6

Fig.1

Home-made double needle water bath electrospinning equipment"

Tab.1

Process parameters of conductive treatment"

样品名 吡咯浓度/
(mol·L-1)		 PTSA浓度/
(mol·L-1)		 FeCl3浓度/
(mol·L-1)
NCY/PPy-1 0.03
NCY/PPy-2 0.04
NCY/PPy-3 0.05 0.03 0.05
NCY/PPy-4 0.06
NCY/PPy-5 0.07
PIY/PPy-1 0.03
PIY/PPy-2 0.04
PIY/PPy-3 0.05 0.03 0.05
PIY/PPy-4 0.06
PIY/PPy-5 0.07

Fig.2

Optical image of NCY and NCY/PPy"

Fig.3

Simple test system for ammonia sensitivity"

Fig.4

Surface morphology of NCY before and after conductive treatment. (a) Appearance of NCY(×67); (b)Surface macromorphology of NCY(×500); (c) Surface microstructure of NCY(×20 000); (d) Surface microstructure of NCY/PPy-4(×20 000)"

Fig.5

Diameter distribution of nanofibers"

Fig.6

FT-IR curves of NCY before and after conductive treatment"

Tab.2

Effect of pyrrole concentration on conductivity of NCY/PPy and PIY/PPy"

吡咯浓度/
(mol·L-1)		 电导率/(10-2 S·cm-1)
NCY/PPy PIY/PPy
0.03 2.58 45.0
0.04 3.10 74.9
0.05 2.85 63.1
0.06 3.43 97.1
0.07 7.19 52.9

Fig.7

Surface morphology of PIY (a) and PIY/PPy-4 (b) (×2 500)"

Fig.8

Extension-load curves of PIY, NCY and NCY/PPy"

Tab.3

Mechanical performance indexes of PIY,NCY and NCY/PPy-4"

试样名称 断裂强
力/N		 断裂伸
长率/%		 初始模量/
(cN·dtex-1)
PIY 18.52±0.51 46.42±1.79 20.18±0.75
NCY 18.75±0.39 46.77±2.03 19.85±0.58
NCY/PPy-4 16.28±0.46 43.73±2.15 15.71±0.59

Fig.9

Response curves of PIY/PPy-4 and NCY/PPy-4 to NH3"

Fig.10

Mechanism of NH3 sensitivity response of PPy"

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