Glass Fillers in Three Different Forms Used as Reinforcement Agents of Polylactic Acid in Material Extrusion Additive Manufacturing

被引:14
作者
Vidakis, Nectarios [1 ]
Petousis, Markos [1 ]
Mountakis, Nikolaos [1 ]
Papadakis, Vassilis [2 ]
Charou, Chrysa [1 ]
Rousos, Vasilis [1 ]
Bastas, Pavlos [1 ]
机构
[1] Hellen Mediterranean Univ, Dept Mech Engn, Iraklion 71410, Greece
[2] Univ West Attica, Dept Ind Design & Prod Engn, Athens 12243, Greece
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 11期
关键词
additive manufacturing (AM); fused filament fabrication (FFF); material extrusion (MEX); 3D printing; polylactic acid (PLA); glass beads; glass flakes; glass powder; MECHANICAL-PROPERTIES; POLYMER COMPOSITES; MATRIX COMPOSITES; CONTINUOUS CARBON; POLYCARBONATE; RAMAN; PERFORMANCE; INTERFACE; SURFACE;
D O I
10.3390/app13116471
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The industrial demand for functional filaments made of bio-sourced, biocompatible, biodegradable, and/or recyclable polymers and composites for material extrusion (MEX) 3D printing is continuously growing. Polylactic acid (PLA), the most popular filament, combines such properties, yet its reinforcement with low-cost, inert, and/or recycled fillers remains challenging. Herein, glass in three different micro/nano-forms was the reinforcement agent in PLA. Three different experimental tiers were elaborated by producing composite filaments with glass in powder, beads, and flake forms in various loadings to optimize the concentrations. A thermomechanical process, i.e., melt filament extrusion, was exploited. The composites were evaluated for their thermal degradation stability and composition using thermogravimetric analysis and Raman. MEX 3D printing was used to produce tensile, flexural, impact, and microhardness specimens, to quantitatively evaluate their mechanical response. Field emission scanning electron microscopy evaluation and fractography were carried out to depict fracture patterns of the specimens after their tests. All three glass types induced impressive reinforcement effects (up to 60% in flexural loading), especially in the flake form. The impact of the additional process cost through glass fillers implementation was also assessed, indicating that such composites are cost-effective.
引用
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页数:25
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