Mechanical and microstructural characterization of epoxy/sawdust (Pinus elliottii) composites

Abstract

The use of wood residues in polymeric matrices is notable for promoting significant mechanical reinforcement of the matrix. Such composites are widely used in the development of new composite materials with tunable mechanical properties for a variety of applications. In this work, polymeric composites with epoxy resin as the polymeric matrix and Pinus elliottii wood residue as the reinforcement were obtained. The composites were obtained by adding wood residue (sawdust) with particle sizes of 0.30, 0.60, and 1.19 millimeters into an epoxy matrix to determine the best mechanical properties of the composite as a function of the particle size. The polymer/sawdust composites were characterized by scanning electron microscopy (SEM), Infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and stress–strain tests. SEM images revealed a smooth and homogeneous surface free of defects and holes. However, lateral profile images showed the presence of fine sawdust particles agglomerated and a considerable number of bubbles and cavities that could interfere in the mechanical properties of the composites. The FTIR characterization of the composite identified the main bands related to epoxy and lignin/cellulose chains. The results of the mechanical properties suggested that epoxy composites with sawdust can increase its tensile strength according to the sawdust particle size introduced into the matrix.

Experimental investigation of epoxy matrix and pine sawdust reinforced wood-polymer composite materials

“…It is specific interaction between cellulose and/or lignin with the epoxy resin can be identified. The similar results were noticed mechanical and micro structural characterization of epoxy/sawdust composites (Mendes et al 2021;Yin et al 2012).…”

“…Assignments of FTIR Wavenumbers Identified in the Pure Epoxy and Epoxy/Pine Sawdust Composite Sample(Mendes et al 2021) …”

Mechanical properties of an epoxy-based coating reinforced with silica aerogel and ammonium polyphosphate additives

“…In recent decades, employing polymers in various applications such as protective coatings, aerospace industry, filtration, biomembrane has increased dramatically. [1][2][3] Among different polymers, excellent properties of epoxy resins, like good mechanical and adhesion performance, dielectric properties, and high corrosion resistance, have made them ideal for the protective coatings' matrix. However, together with the broad advantages of epoxy materials, high flammability, poor thermal stability, and low impact strength have restricted their applications as coatings.…”