Polycaprolactone (PCL) / polylactice acid (PLA) reinforced with polyethlene gylcol (PEG) and nano- hydroxyapatite (n-HA) for fused deposition modeling (FDM) composite filament
In this study, bio-active composite filament for fused deposition modeling (FDM) was investigated. The Polycaprolactone (PCL) and Polylactic acid (PLA) filled with Polyethylene glycol (PEG) and Nano-Hydroxyapatite (n-HA) composites were prepared by melting and compounding using Brabender Plastogr...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2021
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6465/1/24p%20FONG%20MUN%20KIT.pdf http://eprints.uthm.edu.my/6465/2/FONG%20MUN%20KIT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6465/3/FONG%20MUN%20KIT%20WATERMARK.pdf |
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| Summary: | In this study, bio-active composite filament for fused deposition modeling (FDM) was
investigated. The Polycaprolactone (PCL) and Polylactic acid (PLA) filled with
Polyethylene glycol (PEG) and Nano-Hydroxyapatite (n-HA) composites were
prepared by melting and compounding using Brabender Plastograph machine. The
mechanical properties were assessed by tensile, flexural, and Charpy impact tests,
while the thermal properties were studied via a Thermogravimetry analyser (TGA). A
simulated body fluid (SBF) test was used to assess the bioactivity properties of the
composites. The filament wire with the diameter of 1.75+0.05mm was fabricated using
a single screw extruder. Design of experiment (DOE) software was used to find the
optimum setting for inlet temperature, die temperature, spindle (screw) speed, and
roller puller speed to achieve the filament wire's specific diameter. From the
experiment it is found that incorporation of n-HA into PCL/PLA decreases the tensile
strength and elastic modulus of both PCL/PLA/n-HA and PCL/PLA/PEG/n-HA
composites. However, the incorporation of n-HA resulted in improved flexura l
strength and flexural modulus but declined the composites' impact strength. On the
other hand, the incorporation of PEG led into the improvement of flexural and impact
strength of PCL/PLA composite. From the mechanical analysis, P3H5 shows the best
composite in term of mechanical properties and are chosen for further investigatio n.
The incorporation of n-HA did not improve polymer blends' thermal stability;
furthermore, the composite’s decomposition temperature was reduced. However, the
addition of n-HA has enhanced the transition temperature of the composite. The
formation of apatite layers that cover the composite's surface revealed good bioactivity
properties of PCL/PLA/PEG/n-HA composite. The optimum parameter setting to
produce 1.75+0.05mm of P3H5 filament wire was successfully found at an inlet
temperature of 84.55°C, die temperature of 82.35°C, screw speed of 7.43 Hz, and roller
speed of 5.87 rpm. This filament wire is of the right size and strength and can be
extruded using FDM. |
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