3D Printing of Polylactic Acid Bioplastic–Carbon Fibres and Twisted Kevlar Composites Through Coextrusion Using Fused Deposition Modeling  

作　　者：J.Y.Tey W.H.Yeo Y.J.King W.O.Ding 

机构地区：[1]Department of Mechanical and Material Engineering,Lee Kong Chian Faculty of Engineering and Science,Universiti Tunku Abdul Rahman,Jalan Sungai Long,Bandar Sungai Long,Cheras,43000 Kajang,Selangor,Malaysia

出　　处：《Journal of Renewable Materials》2020年第12期1671-1680,共10页可再生材料杂志（英文）

基　　金：This project is funded by Universiti Tunku Abdul Rahman through the grant number IPSR/RMC/UTARRF/2018-C2/T02.

摘　　要：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.

关 键 词：3D printing Kevlar fibre 3K carbon fibre coextruded reinforced plastic polylactic acid bioplastic 

分 类 号：TB3[一般工业技术—材料科学与工程]