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    Development of a multifunctional graphene/Fe-loaded polyester textile: robust electrical and catalytic properties

    Year: 2020

    Journal: Dalton Trans., Volume 49, DEC 21, page 17281–17300

    Authors: Morshed, Mohammad Neaz; Asadi Miankafshe, Milad; Persson, Nils-Krister; Behary, Nemeshwaree; Nierstrasz, Vincent A.

    Organizations: European CommissionEuropean CommissionEuropean Commission Joint Research Centre [532704-EM-5-2017-1-FR-ERA]

    A graphene/Fe loaded polyester fabric (PET) with robust electrical and catalytic properties has been successfully developed for the first time via a simple coating-incorporation method using hyperbranched poly(amidoamine) (PAMAM) dendrimer as the binder. Both graphene oxide (GO/rGO) and zerovalent iron (Fe-0) nanoparticles were loaded on the polyester fabric surface before and after chemical grafting of PAMAM. Full characterization of fabrics before and after modifications has been performed by sessile droplet goniometry, zeta-potential, K/S coating evenness, SEM, XPS, FTIR, TGA and DSC analyses. The results showed successful and uniform coating of GO/rGO and loading of Fe-0 on PET and also showed the correlation between the type of chemical moiety responsible for uniform GO coating, high Fe-0 loading and their electrical and catalytic activities. Sheet resistance (R-sh) analysis was carried out to measure the conductivity of the samples. The lowest R-sh (corresponding to high conductivity) was found in PET-PAM-rGO-Fe-0 (0.74 +/- 0.13 k Omega sq(-1)) followed by PET-rGO-Fe-0 (1.32 +/- 0.18 k Omega sq(-1)), PET-PAM-rGO (2.96 +/- 0.08 k Omega sq(-1)) and PET-rGO (3.41 +/- 0.34 k Omega sq(-1)). Furthermore, Fe-0-loaded samples were found to be effective in the catalytic removal of toxic water pollutants (crystal violet dye) with similar to 99% removal of pollutants in around one hour, as observed by UV-vis spectroscopy. The relatively high electrical conductivity and catalytic activity of PET-PAM-rGO-Fe-0 are related to the role played by PAMAM in the uniform rGO coating and high Fe-0 loading. These findings are of great importance as they allow envisaging the development of multifunctional textiles for combined smart and green chemistry application.
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