期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 20, 页码 23453-23463出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c03830
关键词
3D printing; polyethylene terephthalate glycol; nanoclay; nanocomposite; mechanical strength; small-angle X-ray scattering
资金
- Seoul National University Research Grant in 2018
A fused-deposition modeling (FDM) 3D-printed polyethylene terephthalate glycol (PETG)-sepiolite composite showed effective synergetic mechanical reinforcement in tensile testing compared to an injection-molded composite. The results showed that the addition of 3 phr sepiolite improved the tensile strength of 3D-printed PETG samples by 35.4%, while the tensile strength of injection-molded PETG samples was improved by 7.2%. To confirm these phenomena, FDM PETG-sepiolite composites were investigated by small-angle X-ray scattering to correlate the nanostructures of the composites with their mechanical strengths. The small-angle X-ray scattering data and transmission electron microscopy observations demonstrated that needle-shaped sepiolite particles were aligned in the printing direction. This fine oriented nanostructure formed during 3D printing created a synergistic effect that improved the material properties of the composite. These novel PETG-sepiolite composites with enhanced mechanical properties can be promising materials fabricated via FDM 3D printing.
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