@Article{jrm.2020.011870,
AUTHOR = {J. Y. Tey, W. H. Yeo, Y. J. King, W. O. Ding},
TITLE = {3D Printing of Polylactic Acid Bioplastic–Carbon Fibres and Twisted Kevlar Composites Through Coextrusion Using Fused Deposition Modeling},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {8},
YEAR = {2020},
NUMBER = {12},
PAGES = {1671--1680},
URL = {http://www.techscience.com/jrm/v8n12/40548},
ISSN = {2164-6341},
ABSTRACT = {Polylactic acid (PLA) bioplastic is a common material used in Fused
Deposition Modeling (FDM) 3D printing. It is biodegradable and environmentally
friendly biopolymer which made out of corn. However, it exhibits weak mechanical properties which reduced its usability as a functional prototype in a real-world
application. In the present study, two PLA composites are created through coextruded with 3K carbon fibres and twisted Kevlar string (as core fibre) to form a
fibre reinforced parts (FRP). The mechanical strength of printed parts was examined using ASTM D638 standard with a strain rate of 1 mm/min. It has been
demonstrated that the FRPs coextruded with 3K carbon fibres had achieved significant improvement in Young’s modulus (+180.6%, 9.205 GPa), ultimate tensile
strength (+175.3%, 103 MPa) and maximum tensile strain (+21.6%, 1.833%).
Although the Young’s modulus of Kevlar FRP was found to be similar to as compared to unreinforced PLA (~3.29 GPa), it has gained significant increment in
terms of maximum tensile strain (+179.7%, 104.64 MPa), and maximum tensile
strain (+257%, 5.384%). Thus, this study revealed two unique composite materials, in which the 3K carbon FRP can offer stiff and high strength structure while
Kevlar FRP offers similar strength but at a higher elasticity.},
DOI = {10.32604/jrm.2020.011870}
}