共 45 条
Preparation and Characterization for the Thermal Stability and Mechanical Property of PLA and PLA/CF Samples Built by FFF Approach
被引:58
作者:
Cao, Mengyu
[1
]
Cui, Tianqi
[1
]
Yue, Yuhang
[1
]
Li, Chaoyu
[1
]
Guo, Xue
[1
]
Jia, Xin
[2
]
Wang, Baojin
[1
]
机构:
[1] Northeast Petr Univ, Coll Mech Sci & Engn, Daqing 163318, Peoples R China
[2] China Natl Petr Corp, Procurement & Equipment Dept, Beijing 100007, Peoples R China
来源:
基金:
中国博士后科学基金;
关键词:
fused filament fabrication approach;
polylactic acid;
carbon fiber;
thermal stability;
mechanical property;
COMPOSITES;
IMPACT;
PARTS;
FLAX;
D O I:
10.3390/ma16145023
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Currently, the mechanical performances of polylactic acid (PLA) samples prepared using the fused filament fabrication (FFF) technique are relatively poor. Hence, the carbon fiber (CF) is used to improve the thermal stability and mechanical property of FFF-ed PLA samples in this paper. The crystalline structure, thermal stability, melt flow rate, tensile strength and fractured surface morphology of PLA and PLA/CF samples were investigated with an X-ray diffraction device, differential scanning calorimeter, thermogravimetric analyzer, melt flow rate equipment, universal tensile test machine and scanning electron microscope, respectively. Meanwhile, the reinforcement mechanism of CF on the mechanical property of PLA samples was also analyzed. XRD results revealed that the diffraction peaks intensities of PLA/CF sample were obviously lower than those of PLA sample. TGA and DSC curves illustrated that the initial thermal decomposition temperature, thermal stability and crystallinity of the PLA/CF sample improved significantly. The tensile strength of the PLA/CF sample was 91.58 MPa, which was 42.49% higher than that of the PLA sample. Moreover, SEM images showed that the fractured behavior of the PLA sample varied from brittle fracture to ductile fracture after the introduction of CF. The results concluded the CF is a feasible fiber for enhancing the performances of the PLA sample.
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页数:12
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