Autor según el artículo: Isarn, Isaac; Bonnaud, Leila; Massagues, Lluis; Serra, Angels; Ferrando, Francesc;

Departamento: Enginyeria Mecànica Química Analítica i Química Orgànica Enginyeria Electrònica, Elèctrica i Automàtica

Autor/es de la URV: Ferrando Piera, Francesc / Massagués Vidal, Lluís / Serra Albet, Maria Angels

Palabras clave: Thermal conductivity Stability Platelets Permeability Nanocomposites Mechanical-properties Graphene Functionalization Epoxy resins Composites Coatings Carbon nanotubes Boron nitride Behavior Adhesive strength

Resumen: The enhancement of the thermal conductivity, keeping the electrical insulation, of epoxy thermosets through the addition of pristine and oxidized carbon nanotubes (CNTs) and microplatelets of boron nitride (BN) was studied. Two different epoxy resins were selected: a cycloaliphatic (ECC) epoxy resin and a glycidylic (DGEBA) epoxy resin. The characteristics of the composites prepared were evaluated and compared in terms of thermal, thermomechanical, rheological and electrical properties. Two different dispersion methods were used in the addition of pristine and oxidized CNTs depending on the type of epoxy resin used. Slight changes in the kinetics of the curing reaction were observed in the presence of the fillers. The addition of pristine CNTs led to a greater enhancement of the mechanical properties of the ECC composite whereas the oxidized CNTs presented a greater effect in the DGEBA matrix. The addition of CNTs alone led to a marked decrease of the electrical resistivity of the composites. Nevertheless, in the presence of BN, which is an electrically insulating material, it was possible to increase the proportion of pristine CNTs to 0.25 wt% in the formulation without deterioration of the electrical resistivity. A small but significant synergic effect was determined when both fillers were added together. Improvements of about 750% and 400% in thermal conductivity were obtained in comparison to the neat epoxy matrix for the ECC and DGEBA composites, respectively. (c) 2019 Society of Chemical Industry

Áreas temáticas: Química Polymers and plastics Polymer science Organic chemistry Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciência de alimentos Biotecnología Biodiversidade Astronomia / física

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0959-8103

Direcció de correo del autor: lluis.massagues@urv.cat f.ferrando@urv.cat angels.serra@urv.cat

Identificador del autor: 0000-0002-4197-5600 0000-0003-4450-2734 0000-0003-1387-0358

Página final: 290

Fecha de alta del registro: 2023-02-18

Volumen de revista: 69

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/abs/10.1002/pi.5949

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Polymer International. 69 (3): 280-290

Referencia de l'ítem segons les normes APA: Isarn, Isaac; Bonnaud, Leila; Massagues, Lluis; Serra, Angels; Ferrando, Francesc; (2020). Study of the synergistic effect of boron nitride and carbon nanotubes in the improvement of thermal conductivity of epoxy composites. Polymer International, 69(3), 280-290. DOI: 10.1002/pi.5949

DOI del artículo: 10.1002/pi.5949

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2020

Página inicial: 280

Tipo de publicación: Journal Publications