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Article

Biobased Waterborne Polyurethane-Urea/SWCNT Nanocomposites for Hydrophobic and Electrically Conductive Textile Coatings

1
Color Center, S.A. Ptge. Marie Curie 3, Nau 6, 08223 Terrassa, Spain
2
Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, ETSEIB, Diagonal 647, 08028 Barcelona, Spain
3
Tekniker, Basque Research and Technology Alliance (BRTA), Surface Chemistry and Nanotechnology Unit, Iñaki Goenaga 5, 20600 Gipuzkoa, Spain
4
Inotex spol. s r.o, Stefanikova 1208, 54401 Dvur Kralove n.L., Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editors: Stana Kovačević and Ivana Schwarz
Polymers 2021, 13(10), 1624; https://doi.org/10.3390/polym13101624
Received: 28 April 2021 / Revised: 12 May 2021 / Accepted: 13 May 2021 / Published: 17 May 2021
(This article belongs to the Special Issue Multifunctional Advanced Textile Materials)
Waterborne polyurethane-urea dispersions (WPUD), which are based on 100% bio-based semi-crystalline polyester polyol and isophorone diisocyanate, have been successfully synthesized and doped with single-walled carbon nanotubes (SWCNT) to obtain a finishing agent that provides textiles with multifunctional properties. The chemical structure of WPUD has been characterized by Fourier-transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The thermal properties have been evaluated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical thermal analysis (DMTA). Mechanical properties have been studied by tensile stress–strain analysis. Moreover, the particle size, particle size distribution (PSD), and stability of developed waterborne dispersions have been assessed by dynamic light scattering (DLS), Z-potential, and accelerated aging tests (analytical centrifugation). Subsequently, selected fabrics have been face-coated by the WPUD using knife coating method and their properties have been assessed by measuring water contact angle (WCA), water column, fabric stiffness, and air permeability. The electrical conductivity of textiles coated with SWCNT-doped WPUD has been evaluated by EN 1149 standard. Finally, the surface morphologies of uncoated and coated fabrics have been studied by scanning electron microscopy (SEM). All of the synthesized polyurethane-ureas provide the coated substrates with remarkable water-repellency and water column, being therefore a more sustainable alternative to waterproof coatings based on fluoropolymers, such as PTFE. The additivation of the polymeric matrices with SWCNT has led to textile coatings with excellent electrical conductivity, maintaining water column properties, giving rise to multifunctional coatings that are highly demanded in protective workwear and technical textiles. View Full-Text
Keywords: waterproof; water-column; fluorine-free; bio-based; hydrophobic; electrically conductive textiles; nanocomposites; technical textiles; multifunctional fabrics; textile coatings waterproof; water-column; fluorine-free; bio-based; hydrophobic; electrically conductive textiles; nanocomposites; technical textiles; multifunctional fabrics; textile coatings
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MDPI and ACS Style

Lacruz, A.; Salvador, M.; Blanco, M.; Vidal, K.; Goitandia, A.M.; Martinková, L.; Kyselka, M.; de Ilarduya, A.M. Biobased Waterborne Polyurethane-Urea/SWCNT Nanocomposites for Hydrophobic and Electrically Conductive Textile Coatings. Polymers 2021, 13, 1624. https://doi.org/10.3390/polym13101624

AMA Style

Lacruz A, Salvador M, Blanco M, Vidal K, Goitandia AM, Martinková L, Kyselka M, de Ilarduya AM. Biobased Waterborne Polyurethane-Urea/SWCNT Nanocomposites for Hydrophobic and Electrically Conductive Textile Coatings. Polymers. 2021; 13(10):1624. https://doi.org/10.3390/polym13101624

Chicago/Turabian Style

Lacruz, Amado, Mireia Salvador, Miren Blanco, Karmele Vidal, Amaia M. Goitandia, Lenka Martinková, Martin Kyselka, and Antxon M. de Ilarduya 2021. "Biobased Waterborne Polyurethane-Urea/SWCNT Nanocomposites for Hydrophobic and Electrically Conductive Textile Coatings" Polymers 13, no. 10: 1624. https://doi.org/10.3390/polym13101624

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