研究目的
Investigating the fabrication of luminescent bioplastic composite filaments for 3D printing from polylactic acid (PLA) and samarium doped magnesium aluminate phosphor (MgAl2O4:Sm3+), and their properties.
研究成果
The study successfully fabricated novel luminescent PLA composite filaments with improved mechanical properties. The addition of MgAl2O4:Sm3+ phosphor not only provided luminescent properties but also enhanced the mechanical strength of the composites. Surface modification of the phosphor further improved the mechanical properties of the composites.
研究不足
The study focused on the fabrication and initial characterization of luminescent PLA composite filaments. Further research may be needed to explore long-term stability, environmental impact, and scalability for industrial applications.
1：Experimental Design and Method Selection:
The study involved the preparation of MgAl2O4:Sm3+ phosphor by a metal-complex decomposition method and its modification with 3-aminopropyl triethoxysilane for improved compatibility with PLA. Composite filaments were produced by an extrusion process with varying amounts of phosphors.
2：Sample Selection and Data Sources:
The samples included PLA composite filaments with phosphor contents of 0, 1, 2, 3, and 4 phr.
3：List of Experimental Equipment and Materials:
Equipment included a twin-screw extruder, single-screw extruder, 3D printer (Wanhao Duplicator i3 plus), Fourier-Transform infrared spectrophotometer, X-ray diffractometer, SEM/EDS, DSC, and Fluorescence spectrophotometer. Materials included PLA pellets, MgAl2O4:Sm3+ phosphor, and 3-aminopropyl triethoxysilane.
4：Experimental Procedures and Operational Workflow:
The phosphor was prepared and modified, then mixed with PLA and extruded into filaments. These filaments were then used for 3D printing.
5：Data Analysis Methods:
The study used FTIR, XRD, SEM/EDS, DSC, and photoluminescence measurements for characterization.
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