Epoxy resin coatings modified by ionic liquid. Study of abrasion resistance

Journal ar
Express Polymer Letters
  • Volumen: 13
  • Número: 4
  • Fecha: 01 April 2019
  • Páginas: 303-310
  • ISSN: 1788618X
  • Source Type: Journal
  • DOI: 10.3144/expresspolymlett.2019.26
  • Document Type: Article
  • Publisher: BME-PT and
© BME-PT. In the present study, an epoxy resin coating containing a uniformly dispersed 9 wt% of the ionic liquid 1-octyl-3-methylimidazolium tetrafluoroborate (EP+9%[OMIM]BF 4 ) has been applied by spin coating on a neat epoxy substrate, and its abrasion resistance under multiple scratch has been compared with that of neat epoxy coating. EP+9%[OMIM]BF 4 presents the lowest surface damage after 15 successive scratches. The ionic liquid-modified coating reduces instantaneous penetration depth in a 13% and residual depth in a 22% with respect to EP, and increases viscoelastic recovery (after 30 sec-onds) in a 7.6%. The lubricating effect of the ionic liquid reduces the coefficient of friction up to the tenth scratch number. EP and EP+9%[OMIM]BF 4 have also been obtained in the form of spin-coated films with similar visual transparency. Dy-namic-mechanical characterization of the films under a tensile configuration confirms that the addition of the ionic liquid increases the ductility and reduces the glass transition temperature of the epoxy resin.

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