Synthetic talc as catalyst and filler for waterborne polyurethane-based nanocomposite synthesis
- 77 Downloads
In this work, synthetic talc was used as catalyst and filler aiming to obtain waterborne polyurethane (WPU) nanocomposites by in situ polymerization. Filler was used both in gel and in powder forms in order to compare its effects into the WPU matrix. The use of synthetic talc as filler is interesting due to the possibility of hydrogen bond formation between WPU chains/Si–O–Si and OH groups in synthetic talc edges promoting changes in physical, mechanical and thermal properties. Moreover, WPUs are environmentally friendly polymers replacing organic solvents by water as dispersion medium reducing pollutant emission in the atmosphere. Material structure analyzed by FTIR evidenced that it is possible to synthesize WPU using synthetic talc as catalyst and proved hydrogen bonding formation between synthetic talcs and WPU matrix. Synthetic talcs were well dispersed even with higher filler content, as supported by XRD, TEM, FESEM and AFM analyses. Thermal and mechanical performance was improved with synthetic talc fillers’ addition in order to obtain WPU nanocomposites. Also, Tg of WPU nanocomposites was affected by fillers’ addition as presented by DSC corroborating synthetic talc good dispersion as evidenced by XRD and TEM analyses. Synthetic talcs used as catalyst/filler resulted in nanocomposites with superior thermal and mechanical properties being a new path to utilize synthetic talcs to obtain multifunctional materials.
KeywordsWaterborne polyurethane Synthetic talc In situ polymerization Hydrogen bond
GD and MP thank CAPES for their PhD scholarship. SE acknowledges CNPq for DT Grant (Number 303467/2015-0). This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001. Thanks to Nokxeller—Microdispersions by the supply of part of the reagents used in this work.
- 13.Ramesh S, Punithamurthy K (2017) The effect of organoclay on thermal and mechanical behaviors of thermoplastic polyurethane nanocomposites. Dig J Nanomater Biostruct 12:331–338Google Scholar
- 24.Dias G, Prado M, Ligabue R, Poirier M, Le Roux C, Micoud P, Martin F, Einloft S (2018) Hybrid Pu/synthetic talc/organic clay ternary nanocomposites: thermal, mechanical and morphological properties. Polym Polym Compos 26:127–140Google Scholar
- 25.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 131:40453. https://doi.org/10.1002/app.40453 CrossRefGoogle Scholar
- 26.Yousfi M, Livi S, Dumas A, Crépin-Leblond J, Greenhill-Hooper M, Duchet-Rumeau J (2015) Ionic compatibilization of polypropylene/polyamide 6 blends using an ionic liquids/nanotalc filler combination: morphology, thermal and mechanical properties. RSC Adv 5:46197. https://doi.org/10.1039/c5ra00816f CrossRefGoogle Scholar
- 32.Le Roux C, Martin F, Micoud P, Dumas A (2013) Process for preparing a composition comprising synthetic mineral particles and composition. Int. Pat. WO 2013/004979 A1Google Scholar
- 34.Martin F, Micoud P, Delmotte L, Marichal CL, Dred RD, Parseval P, Mari A, Fortune JP, Salvi S, Beziat D, Ferret OG (1999) The structural formula of talc from the Trimouns deposit, Pyrenees, France. J Can Miner 37:997Google Scholar
- 41.Romo-Uribe A, Santiago-Santiago K, Zavala-Padilla G, Reyes-Mayer A, Calixto-Rodriguez M, Arcos-Casarrubias JA, Baghdachi J (2016) Waterborne layered silicate/acrylate nanocomposites by in situ emulsion polymerization: thermal and mechanical reinforcement. Prog Org Coat 101:59–70CrossRefGoogle Scholar