Evaluation of the role of an ionic liquid as organophilization agent into montmorillonite for NBR rubber nanocomposite production

Evaluation of the role of an ionic liquid as organophilization agent into montmorillonite for NBR rubber nanocomposite production

Author Fontana, Juliana Pedro Autor UNIFESP Google Scholar
Camilo, Fernanda Ferraz Autor UNIFESP Google Scholar
Bizeto, Marcos Augusto Autor UNIFESP Google Scholar
Faez, Roselena Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract In this work we have shown the preparation of montmorillonite (Na + Mt) co-intercalated with a quaternary ammonium salt (hexadecyltrimethylammonium - HDTMA) and an ionic liquid (IL) (1-methyl-3-octylimidazolium bis(trifluoromethanesulfony)imide - OMImTf(2)N) using a mechanochemical process. Changes in the structure of the organophilized montmorillonite were characterized using X-ray diffraction (XRD), thermal gravimetry (TG), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). the presence of both cations (HDTMA and OMIm) into the clay mineral layers was confirmed by FTIR. XRD studies support that the co-intercalation process of the IL cation is more easily established in phases in which the interlayer space is not totally packed with HDTMA and an additional order in ionic liquid phase was observed when the IL amount exceeds 15 mass%. the addition of IL induced a thermal stability gain of 90 degrees C in comparison with the ammonium treated montmorillonite. the incorporation of IL in the ammonium based organoclays also displayed their better compatibility with the elastomeric matrix (NBR). Morphology studies by SEM of cryofractured surfaces evidence an improved interface interaction between the clay mineral and elastomer, indicating that ionic liquid has a direct and pronounced effect on the final clay polymer nanocomposites. This result can be assigned to the covered clay mineral particles mainly for higher IL content. (C) 2013 Elsevier B.V. All rights reserved.
Keywords Montmorillonite
Ionic liquids
Thermal stability
Rubber nanocomposites morphology
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 2007/50742-2
Date 2013-10-01
Published in Applied Clay Science. Amsterdam: Elsevier B.V., v. 83-84, p. 203-209, 2013.
ISSN 0169-1317 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 203-209
Origin http://dx.doi.org/10.1016/j.clay.2013.09.002
Access rights Closed access
Type Article
Web of Science ID WOS:000326661300027
URI http://repositorio.unifesp.br/handle/11600/36810

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