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Abstract
Electroluminescent (EL) filament has received much more attention on the application of smart and displayable textiles. In this work, the co-axial wet-spinning method was utilized to prepare a core/sheath filament with a copper wire as core electrode and thermal polyurethane (TPU) contained EL material of ZnS:Cu as sheath. The outside was wire-winded helically and then was coated with silver coating via magnetron sputtering, which was used as the other electrode. About 10 nm thickness silver coating was afforded after 90 s sputtering, which ensured Ag coating continuity. Finally, the filament was immersed into a waterborne polyurethane (WPU) emulsion to endow a transparent protective layer. When the ratio of Zn:S/TPU was 1:1, the as-obtained EL filament exhibited the highest luminescent efficiency. This strategy made almost all EL materials excited, which provided a promising and facilely scalable method to fabricate EL filament with high utilization rate of EL materials and luminescent efficiency.
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