Mechanical and thermal properties of bamboo fiber reinforced polypropylene/polylactic acid composites for 3D printing

Abstract

In this article, a kind of degradable composite was prepared from bamboo fiber (BF), poly lactic acid (PLA), and polypropylene (PP). The mechanical and thermal properties were characterized by the universal testing machine, thermogravimetric analysis, differential scanning calorimetry. In order to improve the compability between BF and polymer matrix several modification on the surface of BF were explored and compared. Moreover, a compatibilizer (maleated PP) was applied to further increase compatibility between the fiber and matrix. It is found that the thermal stability of BF/PP/PLA composites decreased with the increase of maleated polypropylene (MAPP) content. When 5% MAPP was used the tensile strength, flexural strength, and impact strength of composites reached 33.73, 47.18 MPa, and 3.15 KJ/m2, with an increase by 13, 11.7, and 23.5%, respectively, compared with the composites without MAPP. The improvement of mechanical properties is attributed to the fact that irregular grooves and cracks induced by the modification of BF facilitate the infiltration of polymer into fiber due to the strong capillary effect. Furthermore, BF/PP/PLA composites are potential to be used in 3D printing. POLYM. ENG. SCI., 59:E247–E260, 2019. © 2018 Society of Plastics Engineers

Material extrusion‐based additive manufacturing of polypropylene: A review on how to improve dimensional inaccuracy and warpage

“…Within the last years, a myriad of studies on the incorporation of various fillers into thermoplastics for extrusion‐based AM have been conducted . Various fillers, such as cellulose nanofibrils, thermotropic liquid crystalline fibrils, bamboo fibers, hemp and harakeke fibers, short glass fibers, ash, and mineral fibers have been incorporated into 3D‐printed PP to improve the material's mechanical, rheological, or thermal properties. However, only a handful of studies have focused on the warpage prevention by incorporating fillers into PP filaments.…”

An Experimental Study of Nozzle Temperature and Heat Treatment (Annealing) Effects on Mechanical Properties of High‐Temperature Polylactic Acid in Fused Deposition Modeling

“…In these processes, to make three‐dimensional (3D) objects, the final parts are constructed by joining materials layer by layer. Recently, numerous researches have been conducted on AM processes; their main purpose was to control the processes and improve the materials properties . The birth of AM technology backs to 1988 when the first stereolithography machine was introduced.…”

Three‐Dimensional Printing of Methacrylic Grafted Cellulose Nanocrystal‐Reinforced Nanocomposites With Improved Properties

“…More and more industries such as automotive, electronics are experiencing a revolutionary change with the advent of 3D printing technology . In contrast to the high cost and long production cycle in traditional manufacturing processes, the advanced 3D printing technology has some benefits such as shortening of production time and reduction of raw material consumption in small batches and customized manufacturing fields .…”