Biodegradable polymer composites based on polylactide used in selected 3D technologies

Abstract

As part of the work, new polymer materials were used in 3D printing, which can be used in three technologies depending on the apparatus used: Fused Filament Fabrication (FFF), Melted and Extruded Manufacturing (MEM), Melt Extrusion Polymers (MEP). As part of the work, the properties of obtained polymer composites were examined. Polylactide (PLA) was used as the matrix, and powdered natural ground fillers were used as fillers: bamboo dust (PB), cork dust (PK) and wood dust (PD). In the first part of the work, filaments were received from the tested composites using the filament preparation line made by METACHEM in Torun for use in 3D printers. Samples for mechanical tests were obtained from the filaments thus received by means of an MEP printer and after granulation by injection molding. In the next part of the work, rheological, mechanical and structural properties of obtained composites were examined. It was found that the addition of natural fillers increased the fluidity of the obtained polymeric materials in the case of composite with addition of PK even by 48.73% compared to unfilled PLA. It was also observed that the composites obtained had lower Charpy impact strength, Rockwell hardness and tensile strength. Observation of the microstructure of the composites using SEM confirmed the even distribution of natural fillers in the polymer matrix, which proves well-chosen parameters of their homogenization in the polymer matrix.

Influence of scutellaria baicalensis extract on the thermo‐oxidative and composting stability of poly(butylene adipate‐co‐terephthalate)

“…It is consistent with the previously reported works that the forsythia suspensa extract could effectively enhance the processing stability of the polyethylene matrix 42 . In addition, it is reported that the natural filler could increase the fluidity of the matrix by 48.73% compared to unfilled polylactic acid, and the load, the shape of the filler, and the interaction between the filler and the matrix could influence the fluidity of polymer matrix, further affecting its processing performance 58,59 . These results demonstrated the capability of the SBE to improve the processing performance of PBAT.…”

Manufacturing Polymer Model of Anatomical Structures with Increased Accuracy Using CAx and AM Systems for Planning Orthopedic Procedures

“…The use of models allows for avoiding many unnecessary operational errors. However, it is required to conduct further research processes, which allow for the development of biodegradable materials [ 71 , 72 , 73 ] and reflect the structure and strength of human bone as accurately as possible [ 74 , 75 ], because the models presented in the article had a susceptibility to cutting and milling that was different from natural bone. When planning the procedure, the models presented in the article were made of classic polymer materials, for which it was difficult to perform efficient cuts and drilling due to their plastic deformation.…”

A comprehensive review on natural fillers reinforced polymer composites using fused deposition modeling

“…The thermal stability is unaffected by the addition of Micro cellulose and MAH. Bulanda et al [ 126 ] compared the mechanical properties of PLA/Bamboo Dust/ cork dust/ wood dust with 3D printing and Injection molding. The composite was made using a twin screw extruder using 69% PLA, 30% fillers, and 1% compatibilizer.…”