Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (06): 63-70.doi: 10.13475/j.fzxb.20200605808

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of humidity-sensitive polyurethane fibers with surface electrostatic implantation and adhesion of grapheme

LIANG Jiahao1, WU Yingzhu1(), LIU Haidong2, HUANG Meilin1, CAI Ruiyan2, ZHOU Junjian3, XIE Quanpei1   

  1. 1. College of Textile Materials and Engineering, Wuyi University, Jiangmen, Guangdong 529020, China
    2. Guangdong Bobaolong Co., Ltd., Jieyang, Guangdong 515300, China
    3. Zhongshan Well Dyeing Factory Limited, Zhongshan, Guangdong 528445, China
  • Received:2020-06-19 Revised:2021-03-01 Online:2021-06-15 Published:2021-06-28

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Abstract:

In order to achieve good performance, eco-friendliness and suitability for weaving humidity sensitive fiber, surface electrostatic implantation method was adopted in this research. Pieces of graphene were accelerated in electrostatic field and implanted rapidly onto the surface of melting polyurethane fiber, adhesion of graphene on the fiber surface was achieved after rapid roll pressing, leading to a wool scale-like fiber surface. The preparation process of the fiber was optimized, and the structure and properties of the fiber were characterized. The optimal process was found to be electrode plate distance 15 cm, preparation voltage 45 kV, preparation temperature 50 ℃, and the implantation time 15 s. Research results show that when the graphene content is 4.1%, the conductivity is 7.0 S/m, the breaking strength and elongation at break are 94.9 MPa and 91.5%, respectively, that the humidity sensitive fiber has good sensitive stability, and good humidity sensitivity in high humidity environment, and that response time and the recovery time in low humidity environment are only 16 s and 26 s respectively. The humidity sensitive fiber could be widely applied in corrosive gas environment and flexible intelligent electronic textiles.

Key words: graphene, polyurethane fiber, humidity sensitive fiber, electrostatic implanted, humidity sensing, intelligent textile

Tab. 1

Experimental parameters"

A
制备温度/℃ 		B
外加电压/kV 		C
植入时间/s
45 30 5
50 35 10
55 40 15
60 45 20

Fig.1

SEM images of GR-based humidity sensitive fiber.(a) Blank fiber;(b) Implantation without pressing treatment;(c) Pressing treatment after implantation"

Tab.2

orthogonal test results"

试验
编号 		A B C 石墨烯植
入量/%
1 2 3 4 5
1# 1 1 1 1 1 1.08
2# 2 1 2 2 2 2.33
3# 3 1 3 3 3 3.51
4# 4 1 4 4 4 3.90
5# 1 2 2 3 4 2.73
6# 2 2 1 4 3 1.16
7# 3 2 4 1 2 4.00
8# 4 2 3 2 1 4.03
9# 1 3 3 4 2 4.06
10# 2 3 4 3 1 4.28
11# 3 3 1 2 4 1.74
12# 4 3 2 1 3 3.28
13# 1 4 4 2 3 4.38
14# 2 4 3 1 4 4.18
15# 3 4 2 4 1 3.52
16# 4 4 1 3 2 2.76
K1j 12.25 10.82 6.74 12.54 12.91
K2j 11.95 11.92 11.86 12.48 13.15
K3j 12.77 13.36 15.78 13.28 12.33
K4j 13.97 14.84 16.56 12.64 12.55
Dj 0.505 1.005 2.455 0.200 0.205

Tab.3

Analysis of variance of experimental results"

方差来源 自由度 均方和值 F值 显著性
A 3 0.59 2.95 —
B 3 2.29 11.45 *
C 3 15.15 75.75 *
e 6 0.20 — —

Fig.2

Conductivity and graphene content of fiber prepared under different implantation time 1-45 ℃、30 kV;2-50 ℃、30 kV;3-55 ℃、30 kV;4-60 ℃、30 kV;5-45 ℃、35 kV;6-50 ℃、35 kV;7-55 ℃、35 kV;8-60 ℃、35 kV;9-45 ℃、40 kV;10-50 ℃、40 kV;11-55 ℃、40 kV;12-60 ℃、40 kV; 13-45 ℃、45 kV;14-50 ℃、40 kV;15-55 ℃、45 kV; 16-60 ℃、 45 kV。"

Tab.4

Conductivity and graphene content ratio of GR-based composite fiber prepared by physical blending method"

电导率/(S·m-1) 石墨烯植入量/% 来源
小于4.3×10-4 4 自制物理共混对照样
5.7×10-4 5 文献[14]
0.36 20 文献[5]
1.77 25 文献[15]
7.0 4.1 本文工作

Fig.3

Water resistance test of GR-based humidity sensitive fiber at different applied voltage"

Fig.4

Effect of preparation temperature on breaking strength and elongation at break of fiber"

Fig.5

Resistance variation of GR-based humidity sensitive fiber under different humidity conditions"

Fig.6

Fitting curve of relative humidity and resistance of GR-based humidity sensitive fiber"

Fig.7

Resistance response and recovery curves of GR-based humidity sensitive fiber in different relative humidity"

Fig.8

Resistance repeated curves of GR-based humidity sensitive fiber in different relative humidity"

Tab.5

Comparison of response recovery time between GR-based humidity sensitive fiber and other GR-based humidity sensors"

传感器类型 响应时
间/s 		恢复时
间/s 		相对湿度测
量范围/% 		来源
GR/PPy薄膜 12 53 33~90 [16]
RGO薄膜 28 48 10~90 [17]
GO薄膜 45 24 11~90 [18]
石墨烯湿敏纤维 60 38 0~97 本文工作

Fig.9

Environmental stability of GR-based humidity sensitive fiber"

Fig.10

Variation of bonded graphene under different relative humidity conditions"

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