Abstract
It was studied the feasibility of using corn cob to obtain a polymer composite. It was used of the corn cob in Three-grain sizes, and some formulations of the composite of polyester resin and powders were used, and the most appropriate formulation was chosen. For the characterization of the composite thermal and mechanical properties were determined. The main advantage of the composite was the low density, about 1.06 kg/m³ for the thick powder formulation. The composite presented an inferior mechanical behavior concerning the resin for all the studied particle sizes and formulations. The composite presented better mechanicals results for the bending strength, reaching 25.3 MPa for the thick powder formulation. The composite also proved itself to be viable for thermal applications since it has average thermal conductivity inferior to 0.21 W/m, being classified as thermal insulation and can be used to manufacture structures that do not require significant mechanical strength, such as tables, chairs, benches, panels, works of art, crafts and solar prototypes, such as ovens and stoves.
Highlights
Sustainability has gained increasing importance in society, and environmental issues have been increasing, the focus of studies worldwide
This paper presents a study to obtain and characterize a polymeric matrix composite material using residues generated by corn cobs crushing
The Scanning Electron Microscopy (SEM) analysis showed that there was a deficiency of adhesion between matrix and residue, cohesive fracture in the matrix, presence of impurity, no penetration of resin inside the structure of the particulate and fragile fracture. 3.2 Mechanical Strength
Summary
Sustainability has gained increasing importance in society, and environmental issues have been increasing, the focus of studies worldwide. The literature presents some works on composite materials on the use of particulate composites for the manufacture of industrial panels.(Akinyemi, Afolayan, & Ogunji Oluwatobi, 2016). Brazil is one of the largest grain producers in the world. Projections of the Ministry of Agriculture indicate that Brazil will have in 2021 a 195 million tones production of grains, in an area more than 50.7 million hectares. One of the current problems in agriculture and associated agribusiness is the little concern concerning the generation of wastes and their subsequent destination or treatment. According to the Ministry of Agriculture, Brazil is the third-largest producer of corn, totaling 70.0 million tons in 2015. According to the Brazilian Association of Biomass Industries - ABIB, corn processing residues consist of straw and corncobs, with a residual factor of 58%. According to the Brazilian Association of Biomass Industries - ABIB, corn processing residues consist of straw and corncobs, with a residual factor of 58%. (MAPA, 2012)
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