Development of PLA-Cellulosic Fiber Composites with Improved Mechanical and Thermal Properties
Authors: Soleimani, M., L. Tabil, I. Oguocha, J. Fung
Description: Polylactic acid (PLA) as a biodegradable polymer provides attractive strength and stiffness properties with applications in structural parts, packaging, and parts for the automotive industry. However, some drawbacks such as high brittleness, low heat distortion/deflection temperature (HDT), low resistance to high temperature and humidity and long mold cycle time limiting its applications in comparison to other synthetic polymers such as polypropylene and polyethylene. The objective of this work was to improve impact properties and also HDT of PLA by an appropriate application of cellulosic fiber and a bioelastomer. For this purpose, biocomposites formulations including fiber contents of up to 20% in combination with a bioelastomer were prepared by extrusion in a twin-screw extruder followed by molding in an injection molding system. Fibers used in the formulations included three types of cellulosic fiber; namely, raw fiber (RF), hydrolysis byproduct (ATF) which was the solid fraction obtained from an acid-catalyzed hydrolysis, and delignified fibers (AD30, AD65, AD100) which were the products of delignification of ATF. To assess the quality of the biocomposite formulations and to compare them with the synthetic polymers (PP and PE), they were tested for tensile and bending strengths, stiffness, and thermal properties following ASTM standards.
Keywords: Polylactic acid, biocomposites, biomaterials, lignocellulose, mechanical strength, thermal properties
Technical field: Building Systems Engineering
Conference name: CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, 5-8 July 2015.
Session name: Biosystem Management III - Structures and Environment
Citation: Soleimani, M., L. Tabil, I. Oguocha, J. Fung. 2015. Development of PLA-Cellulosic Fiber Composites with Improved Mechanical and Thermal Properties. CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, 5-8 July 2015.
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering