FIG. 8.

Thermal management using fibers. (a) Cross sectional SEM image of hollow core with aligned shell of a polar bear hair fiber. (b) Woven textile of biomimetic porous fibers made from silk fibroin. (c) The dependence of temperature difference on the pore size of the biomimetic fibers. (a)–(c) Reproduced with permission from Cui et al., Adv. Mater. 30, e1706807 (2018). Copyright 2018 John Wiley and Sons.⁹³ (d) 30 × 30 cm² electro-blown silk/graphene nanoiontronic (SGNI) fibrous skin. (e) Flame resistance of SGNI skin. (f) Thermogravimetric analysis of SGNI skin. (d)–(f), Reproduced with permission from Cao et al., Adv. Mater. 33, e2102500 (2021). Copyright 2021 John Wiley and Sons.⁹¹ (g) An optical image of a thermoelectric fabric. (h) A thermoelectric fabric on the skin. (i) The effect of temperature difference on open-circuit potential generated by thermoelectric fibers. (g)–(i) Reproduced with permission from Xu et al., ACS Appl. Mater. Interfaces 12, 33297 (2020). Copyright 2021 American Chemical Society.¹⁴⁴ (j) Schematic of fabrics produced by chemical vapor deposition and made from graphene glass fiber bundles and fabrics. (k) 7 μm graphene glass fibers woven into textile. (l) The dependence of infrared emission spectra at a wide range of temperature. (j)–(l) Reproduced with permission from Yuan et al., ACS Nano 16, 2577 (2022). Copyright 2022 American Chemical Society.¹⁴⁵