Characterization of 3D printed metal oxide composite polymers
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Miami University / OhioLINK
2020
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=miami1595511295182678 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-miami15955112951826782021-08-03T07:15:53Z Characterization of 3D printed metal oxide composite polymers Joshi, Sharmad Vinod Mechanical Engineering PVDF ZnO 3D printer composites TiO2 Polyvinylidene fluoride (PVDF), a thermoplastic polymer, has been attracting a lot of attention since it was shown to have piezoelectric potential. Processes such as drawing and solvent casting usually result in thin films, limiting the application of PVDF based piezoelectric materials to lithography or electronic subsystems. On the other hand, 3D printing processes have pushed the limits of traditional manufacturing processes, creating unique shapes that otherwise would not be feasible. In this study, a single screw extruder is used to compound PVDF–ZnO and PVDF-TiO2 polymer composites into 3D printer filaments. The mechanical and materials properties of these two polymer nanocomposites were characterized as a function of nanofiller fraction. Properties such as thermal stability and transitions, dynamic and static mechanical analysis, and the crystalline behavior and phases of PVDF-ZnO composites have been analyzed on the extruded filament and, 3D printed test specimens. Furthermore, an attempt was made to detect piezoelectricity in the 3D printed specimens. TGA proved the suitability of ZnO over TiO2 as a nanofiller. DSC results gave promising indications about the formation of the electroactive β-phase in the composite filament. Furthermore, FT-IR confirmed the transformation into β--phase as s α−β ratio was decreasing. Rheometry results indicated that the composites were suitable for melt extrusion. DMA experiment showed the stiffening effect of the ZnO nanofillers over a large temperature range. Tensile and Flexural tests further confirmed the stiffening effect as seen in the increasing trend of tensile and flexural modulus, especially for the HCR specimen. Tensile strengths remained fairly constant. These results show that the PVDF-ZnO composites are a viable option for 3D printing because of the transformation from α to β phase, the stiffening effect of ZnO nanofillers and their suitability for melt extrusion. 2020-07-27 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1595511295182678 http://rave.ohiolink.edu/etdc/view?acc_num=miami1595511295182678 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Mechanical Engineering PVDF ZnO 3D printer composites TiO2 |
| spellingShingle |
Mechanical Engineering PVDF ZnO 3D printer composites TiO2 Joshi, Sharmad Vinod Characterization of 3D printed metal oxide composite polymers |
| author |
Joshi, Sharmad Vinod |
| author_facet |
Joshi, Sharmad Vinod |
| author_sort |
Joshi, Sharmad Vinod |
| title |
Characterization of 3D printed metal oxide composite polymers |
| title_short |
Characterization of 3D printed metal oxide composite polymers |
| title_full |
Characterization of 3D printed metal oxide composite polymers |
| title_fullStr |
Characterization of 3D printed metal oxide composite polymers |
| title_full_unstemmed |
Characterization of 3D printed metal oxide composite polymers |
| title_sort |
characterization of 3d printed metal oxide composite polymers |
| publisher |
Miami University / OhioLINK |
| publishDate |
2020 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=miami1595511295182678 |
| work_keys_str_mv |
AT joshisharmadvinod characterizationof3dprintedmetaloxidecompositepolymers |
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1719457484968558592 |