Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (08): 107-112.doi: 10.13475/j.fzxb.20210803307

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and electromagnetic shielding properties of polyester fabric based nano-copper/reduced graphene oxide composites

YANG Honglin1(), XIANG Wei1, DONG Shuxiu2   

  1. 1. Jianhu Institute, Zhejiang Industry Polytechnic College, Shaoxing, Zhejiang 312000, China
    2. China Dyeing and Printing Association, Beijing 100020, China
  • Received:2021-08-03 Revised:2022-01-14 Online:2022-08-15 Published:2022-08-24

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Abstract:

In order to prepare lightweight and flexible materials with electromagnetic shielding properties, nano copper emulsion and graphene oxide were loaded on polyester fabrics by dip-padding, after which the graphene oxide was reduced by a chemical reduction method to achieve polyester fabrics loaded with nano-copper/reduced graphene oxide composite. The materials were characterized by scanning electron microscopy, Fourier transform infrared spectrometer and X-ray diffraction. The effects of particle size of nano-copper emulsion, mass fraction of nano copper emulsion and graphene oxide on electromagnetic shielding properties of the composite materials were studied. The results show that the composite materials have excellent electromagnetic shielding properties with a minimum reflection loss value of –38.06 dB, with the average particle size of nano copper emulsion being 93.7 nm and mass fraction 20％, and mass fraction of the graphene oxide 8％. Compared with untreated polyester fabric, the composite materials have better wettability and handle, but the breaking strength of composite materials reduced slightly.

Key words: nano-copper, reduced graphene oxide, polyester fabric, composite material, electromagnetic shielding property

CLC Number: 

  • TS195.2

Fig.1

Preparation schematic illustration of nano-copper/reduced graphene oxide composite materials loaded on polyester fabrics"

Fig.2

SEM images of surface morphology of polyester fabrics and composite materials (×2 000). (a) Polyester fabric; (b) Nano-copper composite materials loaded on polyester fabric; (c) Nano-copper/reduced graphene oxide composite materials loaded on polyester fabric"

Tab.1

X-ray microanalysis of polyester fabrics and composite materials"

试样 不同元素含量/％
C O Cu
涤纶织物 56.0 44.0 —
涤纶基纳米铜复合材料 48.3 42.8 8.9
涤纶基纳米铜/还原氧
化石墨烯复合材料		 63.7 35.7 0.6

Fig.3

FT-IR spectra of polyester fabrics and composite materials"

Fig.4

XRD patterns of polyester fabrics and composite materials. (a)2θ ranging from 5° to 60°; (b)2θ ranging from 11° to 16°; (c)2θ ranging from 20° to 28°"

Tab.2

Effect of particle size of nano-copper emulsion on electromagnetic shielding property of nano-copper composite materials loaded on polyester fabrics"

平均粒径/nm 25.4 93.7 237.8 514.6 1 408.6
最小反射损
耗值/dB		 –6.81 –11.22 –10.56 –5.89 –3.65

Fig.5

TEM images of nano copper emulsion with average particle size of 93.7 nm (a), 237.8 nm(b), 514.6 nm(c), and 1 408.6 nm(d)"

Tab.3

Effect of nano copper emulsion mass fraction on electromagnetic shielding property of composite material"

纳米铜乳液质量分数/％ 最小反射损耗值/dB
0 –0.04
5 –4.47
10 –6.78
15 –8.56
20 –11.22
25 –11.65

Tab.4

Effect of graphene oxide mass fraction on electromagnetic shielding property of composite materials"

氧化石墨烯质量分数/％ 最小反射损耗值/dB
0 –11.22
2 –17.67
4 –22.34
6 –30.87
8 –38.06
10 –39.39

Tab.5

Reflective loss values of polyester fabrics and composite materials at different frequency"

频率/MHz 反射损耗值/dB
涤纶织物 涤纶基纳米铜/还原
氧化石墨烯复合材料
0.300 2.87 –1.90
1.001 0.34 –38.06
30.990 –0.04 –1.10
522.157 0.35 –1.54
706.344 0.01 –2.86
982.625 0.05 –6.80
1 335.651 1.64 –2.72
1 995.655 0.01 –0.30
2 931.941 4.39 –0.11

Tab.6

Absorbency, Zeta potential values, breaking strength and drape coefficient of polyester fabrics and composite materials"

试样 亲水
性/s		 Zeta电
位/mV		 断裂强
力/N		 悬垂系
数/％
涤纶织物 >60 –69.8 463 56.38
涤纶基纳米铜/还原
氧化石墨烯复合材料		 4.55 –40.4 451 41.66
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