The micromechanics of graphene oxide and molybdenum disulfide in thermoplastic nanocomposites and the impact to the polymer-filler interphase

• Published in: Composites science and technology Vol. 243; p. 110236
• Main Authors: Cremonezzi, Josué Marciano de Oliveira, Pinto, Gabriel Matheus, Mincheva, Rosica, Andrade, Ricardo Jorge Espanhol, Raquez, Jean-Marie, Fechine, Guilhermino José Macedo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20-10-2023
• Subjects: Graphene and other 2D-materials (A); Interphase (B); Mechanical properties (B); Nanocomposites (A); Polymer-matrix composites (PMCs) (A); Mechanical properties (B); Nanocomposites (A); Interphase (B); Graphene and other 2D-materials (A); Polymer-matrix composites (PMCs) (A)
• ISSN: 0266-3538; 1879-1050
• DOI: 10.1016/j.compscitech.2023.110236

The addition of two-dimensional nanomaterials to a polymer matrix is a widely known manner to mechanically reinforce the material. The stress-transfer in the polymeric matrices, however, depends on an array of filler and matrix properties as well as on their interface. In this work, we discuss the effects of the distinct levels of interaction of graphene oxide, reduced graphene oxide and molybdenum disulfide with poly(vinyl butyral) in the reinforcement of the polymer. For that, we employed the micromechanical analysis model originally developed by Young et al., which describes the reinforcement behavior of graphene nanoplatelets in a wide range of polymer matrices. Then, using an innovative approach derived from such analysis, we propose novel methods to mathematically evaluate the effects of the filler content upon the polymer/filler interface, and for the determination of the mechanical percolation threshold.
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•The reinforcement of poly(vinyl butyral) by GO and MoS2 is analyzed using a micromechanical analysis.•The influence of the polymer/filler interactions on the reinforcement is discussed.•An innovative approach to assess the mechanical percolation threshold is presented.