1. Study on Process Optimization and Properties of PLA/HA Composites by SLS.
- Author
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LIN Kesheng, LIU Jie, ZHANG Yuanling, and YAN Chunze
- Subjects
PROCESS optimization ,CONTACT angle ,SELECTIVE laser sintering ,COMPOSITE materials ,ENERGY density ,BIODEGRADABLE materials ,POLYLACTIC acid - Abstract
PLA(a biodegradable material) and HA(the main inorganic component) were used as research objects. In order to obtain the optimal parameters of SLS parts of composite materials, the SLS process of pure PLA was optimized firstly. It is found that the tensile strength of pure PLA prepared by SLS are over 23 MPa when the laser energy density range is as 0.040~0.075 J/mm2, and the highest strength is as 27.28 MPa. The PLA/HA composites with different HA contents were processed with laser energy density of 0.040 J/mm2, laser power of 12 W and scanning speed of 1 500 mm/s, to study the influences of HA contents on the microstructure and mechanics properties of PLA/HA composites. The experimental results show that the composite with 10% mass fraction HA has the best mechanics properties and micromorphology. The water contact angle tests also exhibit that the contact angles of the materials decrease from 69.52° to 57.96°, which indicate that the hydrophilicity of the materials is improved. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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