Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (12): 111-118.doi: 10.13475/j.fzxb.20201106008

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Electromagnetic shielding properties of graphene oxide/polypyrrole coated cotton fabric with layer-by-layer assembling method

ZOU Lihua1, YANG Li1, LAN Chuntao2, RUAN Fangtao1, XU Zhenzhen1()   

  1. 1. Anhui Province International Cooperation Research Center of Textile Structure Composite Materials,Anhui Polytechnic University, Wuhu, Anhui 241000, China
    2. School of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2020-11-30 Revised:2021-05-21 Online:2021-12-15 Published:2021-12-29
  • Contact: XU Zhenzhen E-mail:xuzhenzhen@ahpu.edu.cn

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Abstract:

To study the influence of deposition of graphene oxide (GO)/polypyrrole (PPy) and their concentrations on electromagnetic shielding property of coated fabric, and obtain highly efficient wave-absorbing electromagnetic shielding properties, GO/PPy functional film was constructed on a cotton fabric using layer-by-layer assembling method.The GO/PPy coated fabric structure was characterized by Fourier infrared spectrometer and scanning electron microscope, and the electrical conductivity and electromagnetic shielding properties of the fabric were tested by multimeter and vector network analyzer.The results show that the cationic treatment of the fabric is beneficial for the deposition of GO and PPy. It was found that optimal GO concentration (0.4 g/L) is beneficial to improve the electromagnetic shielding effectiveness of the fabric, and that with the increase of the number of assembled layers, the electromagnetic shielding efficiency of the coated fabric increases. In particular, when the number of assembled layers was 20, the electromagnetic shielding efficiency of the fabric reached 39.2 dB, which can shield 99.98% of the electromagnetic energy. The absorptivity of electromagnetic wave is always more than 50%. The main shielding mechanism is absorption, followed by reflection.

Key words: layer-by-layer assembly method, graphene oxide, polypyrrole, conductive mesh, electromagnetic shielding fabric, assembled layer, cationic treatment, cotton fabric

CLC Number: 

  • TS101.8

Fig.1

FT-IR spectra of cotton fabric, GO powder fabric, PPy powder and (GO/PPy)*4 coated cotton fabric"

Fig.2

Electromagnetic interference shieding effectiveness of untreated cotton fabric, cationized and uncationized cotton fabric with (GO/PPy)*2 functional film"

Fig.3

SEM images of untreated cotton and functionalized cotton fabric with (GO/PPy)*2 functional film(×5 000). (a)Untreated contton fabric; (b)Uncationized cotton fabric; (c)Cationized cotton fabric"

Fig.4

Mass loading of (GO/PPy)*m functional film on cotton fabric with different GO mass concentration"

Fig.5

Electromagnetic shieding effectiveness of cotton fabric with different GO mass concentration and number of bilayer"

Fig.6

Weight gain ratio of cotton fabric with different GO mass concentration and number of bilayer. (a) Number of GO layer;(b) Number of PPy layer"

Fig.7

SEM images of cotton fabrics coated by (GO/PPy)*4 functional film with different GO mass concentrations(×1 000)"

Fig.8

Electrical conductivity of coated cotton fabric with different GO mass concentration and number of GO/PPy bilayer"

Fig.9

Relationship between SET, SEA and SER with number of GO/PPy functional film bilayer coated on cotton fabric"

Fig.10

Relationship between absorptivity, reflectivity and transmissitivity with number of assembled bilayer"

Fig.11

SEM images of cotton fibers coated with different bilayer of GO/PPy functional film(×5 000)"

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