Speaker
Description
Smart textiles are defined as textile products where fibers and/or filaments, woven or knitted, can interact with the environment and the user. They are usually based on electrical conductive textiles including metal-based fillers. Nevertheless, most of the metal-based fillers are toxic so the use of graphene sheets is preferred regarding their thermal and chemical stability as well as their high electrical conductivity (10 4 S.cm-1). In the literature, aqueous suspensions of reduced graphene oxide (rGO) have been used to coat cotton fabric due to the presence of remaining hydroxyl groups which favor their adsorption onto cotton.(1)
Graphene suspensions stabilized by an anionic surfactant has also been adsorbed onto cotton fabric and at least 5 padding coating cycles were required to obtain a conductivity of 0.8 S.cm-1.(2)
Herein, the elaboration of electrical conductive textiles was based on the functionalization of cotton yarns by graphene sheets through the use aqueous suspensions of graphene stabilized with a cationic surfactant such as cetyltriamonium bromide (CTAB). Indeed, considering that graphene sheets and cotton yarns exhibit a negative zeta potential, CTAB was well adapted to favor electrostatic interactions. After an immersion time of 1h for the cotton yarns in an ultrasonic bath containing an aqueous graphene suspension of 5 g/L at 20°C, it was shown that the cotton yarns display improved electrical conductive properties under stretching. In particular, the electrical conductivity increased from ≈10 -3 to 1 ± 0.3 S.cm -1 for a strain of 13 ± 1,5% ()
- Karim, N. et al. ACS Nano 11, 12266–12275 (2017)
- Afroj,S. et al. Adv. Funct. Mater. 30, (2020)
| Speaker Country | France |
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