Waterborne polyurethane/Fe3O4-synthetic talc composites: synthesis, characterization, and magnetic properties
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Nano-Fe3O4-synthetic talc gel was used as filler in the synthesis of waterborne polyurethane/Fe3O4-synthetic talc nanocomposites. This filler presents numerous edges (Si–O and Mg–O) and OH groups easily forming hydrogen bonds and polar interaction with water conferring hydrophilic character, consequently improving filler dispersion within a water-based matrix. Yet, the use of waterborne polyurethane (WPU) as matrix must be highlighted due to its environmentally friendly characteristics and low toxicity compared to solvent-based product. Fe3O4-synthetic talc-nanofillers were well dispersed into the polyurethane matrix even at high filler content as supported by XRD and TEM analyses. NMR indicates the interaction of filler OH groups with the matrix. For all nanocomposites, one can see a typical ferromagnetic behavior below Curie temperature (about 120 K) and a superparamagnetic behavior above this temperature. The use of Fe3O4-synthetic talc for obtaining magnetic nanocomposites resulted in improved materials with superior mechanical properties compared to solvent-based nanocomposites.
KeywordsWaterborne polyurethane Nanocomposites Synthetic Fe3O4-talc Physical mixture
LS (No Proc.: BEX 6547/15-0) thanks CAPES, SE, and RL acknowledge CNPq for DT grant. We acknowledge LabNMR-CENIMAT at FCT-UNL and RNRMN for access to the facilities. RNRMN is supported with funds from the Foundation for Science and Technology. This work is also funded by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT-Portuguese Foundation for Science and Technology under the Project Number POCI-01-0145-FEDER-007688, Reference UID/CTM/50025.
- 7.Dumas A, Gardes E, Le Roux C, Martin F, Micoud P (2013) Process for preparing a magnetic talcous composition and magnetic talcous composition. PCT Int. Pat. Appl. WO 2013093376 A1 June 27 2013 Fr. Pat. Appl. FR 2984872 A1 June 28 2013Google Scholar
- 8.Dumas A, Le Roux C, Martin F, Micoud P (2013) Process for preparing a composition comprising synthetic mineral particles and composition. PCT Int. Pat. Appl. WO 2013004979 A1 Jan 10 2013 Fr. Pat. FR 2977580 B1 August 16 2013Google Scholar
- 10.Dias G, Prado MA, Carone C, Ligabue R, Dumas A, Martin F, Le Roux C, Micoud P, Einloft S (2015) Synthetic silico-metallic mineral particles (SSMMP) as nanofillers: comparing the effect of different hydrothermal treatments on the PU/SSMMP nanocomposites properties. Polym Bull 7:2991–3006CrossRefGoogle Scholar
- 14.Yousfi M, Livi S, Dumas A, Crépin-Leblond J, Greenhill-Hooper M, Duchet-Rumeau J (2014) Compatibilization of polypropylene/polyamide 6 blends using new synthetic nanosized talc fillers: morphology, thermal and mechanical properties. J Appl Polym Sci 131:40453Google Scholar
- 16.Wang G, Ma G, Hou CA, Guan T, Ling L, Wang B (2014) Preparation and properties of waterborne polyurethane/nanosilica composites: a diol as extender with triethoxysilane group. J Appl Polym Sci 131(15):1–7Google Scholar