Electrical conductivity of different carbon nanotubes on wool fabric: An investigation on the effects of different dispersing agents and pretreatments
2016
Nafeie, Nastaran | Montazer, Majid | Nejad, Nahid Hemmati | Harifi, Tina
In this study, conductive wool fabrics were prepared using different concentrations of multiwall carbon nanotube (MWCNT) and carboxylated multiwall carbon nanotube (FMWCNT) in presence of citric acid as a cross-linking agent and sodium hypophosphite as a catalyst. Effects of different pretreatments including oxidation by potassium permanganate, enzyme treatment with protease and nano TiO2 finishing were also studied. An anionic and a cationic surfactants namely sodium dodecyl sulphate (SDS) and cetyltrimethylammonium bromide (CTAB) were also used to provide the best conditions for dispersing the nanotubes. While CTAB was more effective for dispersing MWCNT in water, the best dispersion bath for FMWCNT needed no surfactant. The samples treated with FMWCNT indicated conductivity 10 times higher than MWCNT due to interactions between the functional groups of wool and carboxyl groups of FMWCNT. Wool fabric pretreated with protease then treated with 5g/L FMWCNT regarded as the optimum sample with the highest electrical conductivity of 2×10⁻³S/cm along with improved mechanical properties.
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