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Article

Biobased Waterborne Polyurethane-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic 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 Eibar, Spain
4
Inotex Spol. s r.o, Stefanikova 1208, 54401 Dvůr Králové nad Labem, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editors: Leyre Pérez-Álvarez and Tobias Benselfelt
Polymers 2021, 13(20), 3526; https://doi.org/10.3390/polym13203526
Received: 22 September 2021 / Revised: 7 October 2021 / Accepted: 8 October 2021 / Published: 13 October 2021
(This article belongs to the Special Issue State-of-the-Art Polymeric Surfaces and Coatings)
Waterborne polyurethane-urea dispersions (WPUD), which are based on fully biobased amorphous polyester polyol and isophorone diisocyanate (IPDI), have been successfully synthesized obtaining a finishing agent that provides textiles with an enhanced hydrophobicity and water column. Grafting of trans-cyclohexanediol isobutyl POSS (POSS-OH) to the biobased polymer backbone has also been investigated for the first time and its properties compared to a standard chain extender, 1,3-propanediol (PDO). 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) and thermogravimetric analysis (TGA). 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, storage aging tests, and accelerated aging tests by analytical centrifuge (LUM). Subsequently, selected fabrics have been face-coated by the WPUD using the knife coating method and their properties have been assessed by measuring the water contact angle (WCA), oil contact angle (OCA), water column, fabric stiffness, air permeability, and water vapor resistance (breathability). Finally, the surface morphology and elemental composition of uncoated and coated fabrics have been studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. All of the synthesized polyurethane-ureas provided the coated substrates with a remarkable hydrophobicity and water column, resulting in a more sustainable alternative to waterproof coatings based on fluoropolymers, such as PTFE. Grafting POSS-OH to the polymeric backbone has led to textile coatings with enhanced hydrophobicity, maintaining thermal, mechanical, and 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; hybrid POSS; technical textiles; multifunctional fabrics; textile coatings waterproof; water-column; fluorine-free; bio-based; hydrophobic; hybrid POSS; 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-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic Textile Coatings. Polymers 2021, 13, 3526. https://doi.org/10.3390/polym13203526

AMA Style

Lacruz A, Salvador M, Blanco M, Vidal K, Goitandia AM, Martinková L, Kyselka M, de Ilarduya AM. Biobased Waterborne Polyurethane-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic Textile Coatings. Polymers. 2021; 13(20):3526. https://doi.org/10.3390/polym13203526

Chicago/Turabian Style

Lacruz, Amado, Mireia Salvador, Miren Blanco, Karmele Vidal, Amaia M. Goitandia, Lenka Martinková, Martin Kyselka, and Antxon Martínez de Ilarduya. 2021. "Biobased Waterborne Polyurethane-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic Textile Coatings" Polymers 13, no. 20: 3526. https://doi.org/10.3390/polym13203526

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