Polymeric adhesive and inorganic nanoparticles functionalized with organic layer nanocomposites

• Grant number: 16/13191-7
• Support type: Scholarships in Brazil - Master
• Effective date (Start): October 01, 2016
• Effective date (End): February 28, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Principal Investigator: Edson Roberto Leite
• Grantee: Cibele Carneiro Pessan
• Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

The union of two substrates with adhesive has the objective of creating structures which combine structural and/or functional properties of materials that, separately, would not present such properties and/or viable obtainment. Consequently, the adhesive is part of the final structure, because it musts guarantee the components structural and functional stability.The many applications of adhesives in the industry demand high mechanical and chemical resistance of the adhesive phase. Studies point out that polymeric adhesives functionalization with nanoparticles allows gains in mechanical and chemical resistance. However, the gain may occur in the expense of the adhesive force, i.e., by improving the material's cohesion there may be loss in the material's adhesion, because these are oppositional properties of the material.This work has the objective of improving the cohesion of commercial polyurethane based adhesive from the dispersion of inorganic nanoparticles functionalized with organic layer, without loss in the material's adhesion. As secondary objective, there is the study of the effects of the nanoparticles presence over the PU's adhesion, cohesion and wettability, as well as its mechanical and chemical resistance, varying the mass percentage of nanoparticles mixed into the adhesive.The nanoparticles (NP) will be produced by synthesis route developed by the research group in the Interdisciplinary Laboratory of Electrochemistry and Ceramics (LIEC) of the Chemistry Department of Federal University of São Carlos (UFSCar). Nanocomposite films will be prepared through dip coating method and then characterized. Also, Substrate-Adhesive-Substrate (SAS) systems will be prepared so that measurements simulating real application of the adhesive can be made. All testing will be based on ASTM norms.