Abstract
Electromagnetic shielding fabric (ESF) is a novel electromagnetic shielding product with portability, flexibility, and good mechanical properties. However, the existing ESFs suffer from poor washing fastness of coating and poor comfort performance in terms of hand-feel characteristic. In this study, a core layer-coated yarn (CLCY) was successfully spun using a carboxylic acid-functionalized multi-walled carbon nanotube/polypyrrole/Fe3O4 composite suspension with polyvinyl butyral as an adhesive agent. To better explore the properties, the original fabric and treated fabrics, viz., core layer-coated fabric (CLCF) and surface layer-coated fabric (SLCF), were characterized by several methods. Scanning electron microscopic observations revealed that the coating was on the core layer in CLCF. In addition, the Fourier-transform infrared spectroscopy and X-ray diffraction spectroscopy results revealed that the composition of the coating corresponds with that in the multi-composite suspension. Moreover, the coating of CLCY formed a conductive path with good conductivity in the core layer, but the conductivity of the coating on the surface layer of SLCF deteriorated sharply after washing. Further, compared with the original fabric and SLCF, CLCF has highest breaking strength (after 10 washes), and keeps a relatively good hand-feel characteristic. Finally, the evaluated electromagnetic interference shielding characteristics reveal that the fastness of coating affects the electromagnetic shielding effectiveness, suggesting that the wrapped protection of outside staple fibers in CLCF reduce the loss of coating in the core layer during washing. However, the coating on the surface layer in SLCF could be washed away easily.
Highlights
Electromagnetic radiation is a major source of pollution after water, air, and noise pollution.[1]
Duan et al.[14] compared shielding effectiveness between the electromagnetic shielding fabrics prepared by full penetration method and coating method, respectively, and the results show that the full penetration method has better electromagnetic shielding effectiveness (EMSE) value than coating method
core layer-coated yarn (CLCY) was successfully prepared via spinning using a MWCNT-COOH/polypyrrole/Fe3O4 composite suspension as a core-coating material
Summary
Electromagnetic radiation is a major source of pollution after water, air, and noise pollution.[1] The electromagnetic radiation generated by natural and artificial electromagnetic pollution sources can cause damage to the nervous system and immune system of humans and animals.[2] With the improvement in awareness of protection against electromagnetic pollution, the quantity of electromagnetic shielding fabrics (ESFs) currently available is not sufficient to meet the market demand. It is highly significant to further develop ESFs to obtain thinner, lighter, softer, and safer alternatives. Multicomposite materials based on the combination of polypyrrole/carboxylic carboxylic acid-functionalized multi-walled carbon nanotubes (MWCNT-COOH). State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, P.
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