CARACTERIZACIÓN ESTRUCTURAL DE METACAOLÍN Y ARCILLA ILLÍTICA PARA SU POTENCIAL USO COMO RELLENO DE MATRICES POLIMÉRICAS

MARIO D. NINAGO; CECILIA I. PAULO; GUILLERMINA MARCHETTI; OLIVIA V. LÓPEZ; ANDRÉS E. CIOLINO; MARCELO A. VILLAR

Córdobaq

Congreso; Congreso Internacional de Metalurgia y Materiales 16º CONAMET 2016, en cuyo marco se desarrolló el Simposio MATERIALES Y TECNOLOGÍAS PARA LA INDUSTRIA METALMECÁNICA Y AEROESPACIAL; 2016

SAM (Asociación Argentina de Materiales) entre otras

Over the last decades has increased the interest in composite materials based on natural or synthetic polymer matrices due to the wide variety of applications at industrial scale. Nowadays, many fillers with interesting applications are of the mineral type, mainly due to its relatively low cost and high availability,which leads to the formulation of new composite materials in a quite easy way. Final properties of those composite materials are highly related to the morphology, size, and aspect ratio of mineral fillers employed [1]. Metakaolin (MK) is an activated aluminosilicate obtained by calcination, which is widely used in the cement formulation since it improves the mechanical performance of the material [2]. Illítica clay (AI) is a silicate of the mica family. Because of its high aspect ratio, AI has been widely used in polymeric nanocomposite materials [3]. In this work, a structural characterization of AI and MK particles was performed through Fourier Transform Infrared Spectroscopy and X-ray diffractions. Particles size distribution was determined by Laser Diffraction, showing a unimodal distribution with an average size of ~ 1.5 µm for MK and bimodal (~ 1.4 µm and ~ 8.7 µm) for AI. In order to evaluate the potential use of these minerals as fillers, 1 %w/w and 5 %w/w of AI and MK were incorporated into two different polymeric matrices: thermoplastic starch (TPS) and high density polyethylene (HDPE). Flexible films were obtained from the polymeric nanocomposites by thermo-compression. Obtained composites were homogeneous, translucent and easy to handle. The influence of different particles on mechanical and optical properties of the polymer composites was also studied.REFERENCES1. L. Peponi, D. Puglia, L. Torre, L. Valentini, J. M. Kenny ?Processing of nanostructured polymers andadvanced polymeric based nanocomposites?, Materials Science and Engineering R, Vol. 85 (2014) 1-46. Contents2. J. A. Mbey, F. Thomas, ?Components interactions controlling starch?kaolinite composite filmsproperties?, Carbohydrate Polymers, Vol. 117 (2015) p. 739-745.3. E. Jeong, J. W. Lim, K, Seo, Y. Lee, ?Effects of physicochemical treatments of illite on the thermomechanical properties and thermal stability of illite/epoxy composites?, Journal of Industrial andEngineering Chemistry, Vol. 17 (2011) p. 77-82.