Tensile behavior analysis combined with digital image correlation and mechanical and thermal properties of microfibrillated cellulose fiber/ polylactic acid composites

Luiz C.C. Jesus; Janaíne M. Oliveira; Rosineide M. Leão; Lílian R. Beltrami; Ademir J. Zattera; Carla T.M. Anflor; Thiago C.R. Doca; Sandra M. Luz

Polymer Testing (Sep 2022)

Tensile behavior analysis combined with digital image correlation and mechanical and thermal properties of microfibrillated cellulose fiber/ polylactic acid composites

Luiz C.C. Jesus,
Janaíne M. Oliveira,
Rosineide M. Leão,
Lílian R. Beltrami,
Ademir J. Zattera,
Carla T.M. Anflor,
Thiago C.R. Doca,
Sandra M. Luz

Affiliations

Luiz C.C. Jesus: Mechanical Sciences Program, Mechanical Engineering, University of Brasília, Brasília, DF, Brazil
Janaíne M. Oliveira: Civil Engineering Department, Ceres Campus, Unievangelica Centro Universitário, Ceres, GO, Brazil
Rosineide M. Leão: Institute of Exact Sciences and Technology, Paulista University, Brasília, DF, Brazil
Lílian R. Beltrami: Process and Technology Engineering Program, University of Caxias do Sul, Caxias do Sul, RS, Brazil
Ademir J. Zattera: Process and Technology Engineering Program, University of Caxias do Sul, Caxias do Sul, RS, Brazil
Carla T.M. Anflor: Automotive Engineering, Gama Campus, University of Brasília, Brasília, DF, Brazil
Thiago C.R. Doca: Mechanical Sciences Program, Mechanical Engineering, University of Brasília, Brasília, DF, Brazil
Sandra M. Luz: Mechanical Sciences Program, Mechanical Engineering, University of Brasília, Brasília, DF, Brazil; Automotive Engineering, Gama Campus, University of Brasília, Brasília, DF, Brazil; Corresponding author. Mechanical Sciences Program, Mechanical Engineering, University of Brasília, Brasília, DF, Brazil.

Journal volume & issue: Vol. 113
p. 107665

Abstract

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Microfibrillated cellulose (MFC) employed as reinforcement of polymeric matrices can increase elastic modulus, stiffness and strength of a composite. In this work, the assessment of the mechanical, thermal properties and tensile tests assisted by digital image correlation (DIC) was performed for curaua fiber MFC-reinforced polylactic acid (PLA) composites as a function of MCF content. First, MFC was incorporated into PLA using a solvent exchange technique and subsequent polymer solubilization to produce master batch composites. Then, more PLA was added to obtain composites with 0.5 and 1.5 wt% MFC by using double screw extrusion and injection molding. As a result, the addition of MFC caused the flexural, tensile, indentation, impact and modulus strengths to increase compared to those of pure PLA. The deformation gradient obtained from DIC verified that the 0.5 wt% MFC/PLA composite presented greater homogeneity in relation to load dispersion, corroborating the higher rigidity, maximum stress, and Poisson's ratio.

Published in Polymer Testing

ISSN: 0142-9418 (Print); 1873-2348 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Polymers and polymer manufacture
Website: https://www.journals.elsevier.com/polymer-testing

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