fig2

Figure 2. Functional fiber manufacturing technology. (A) Coating technique. Process flow for preparing core-shell functional yarn by coating functional materials. Reproduced with permission^[68]. Copyright 2019, Elsevier; (B) injecting technique. The fabrication process of the liquid-metal/polymer core/shell fibers by injecting technique. Reproduced with permission^[73]. Copyright 2020, Elsevier; (C) twisting technique. The fabrication method of conductive polymer fibers by twisting technique. Reproduced with permission^[76]. Copyright 2021, American Chemical Society; (D) spinning technique. The fabrication method of single-electrode triboelectric yarn by spinning technique. Reproduced with permission^[83]. Copyright 2020, American Chemical Society; (E) thermal drawing technique. Process flow of thermally drawn high conductive fibers with controlled elasticity. Reproduced with permission^[91]. Copyright 2022, Wiley-VCH; (F) coaxial extrusion technique. Preparation of stretchable conductive core/shell fibers by coaxial extrusion technique. Reproduced with permission^[94]. Copyright 2022, Elsevier.