Laser sintering of nano-hydroxyapatite coated polyamide 12 powders
As part of a larger study on the laser sintering (LS) of nano-composite structures for biomedical applications, a wet mixing method was used to coat Polyamide 12 (PA12) particles with nano-hydroxyapatite (nHA). The addition of nHA significantly affected powder processability due to laser absorption...
| Main Authors: | , , , |
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| Format: | Article |
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Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/53171/ |
| _version_ | 1848798893361332224 |
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| author | Hui, D. Goodridge, R.D. Scotchford, C.A. Grant, D.M. |
| author_facet | Hui, D. Goodridge, R.D. Scotchford, C.A. Grant, D.M. |
| author_sort | Hui, D. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | As part of a larger study on the laser sintering (LS) of nano-composite structures for biomedical applications, a wet mixing method was used to coat Polyamide 12 (PA12) particles with nano-hydroxyapatite (nHA). The addition of nHA significantly affected powder processability due to laser absorption and heat transfer effects which led to part warping. This phenomenon has not been reported in other studies investigating LS of polymer/HA and nHA powders. Nano-composites containing 0.5–1.5 wt% nHA were successfully produced and tensile testing showed that 0.5 wt% nHA provided the greatest reinforcement with a 20% and 15% increase in modulus and strength respectively. However, the elongation at break had significantly declined which was likely due to the formation of nHA aggregates at the sintering borders following the processing of the coated powders despite being initially well dispersed on the particle surface. |
| first_indexed | 2025-11-14T20:27:00Z |
| format | Article |
| id | nottingham-53171 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:27:00Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-531712020-05-04T19:48:34Z https://eprints.nottingham.ac.uk/53171/ Laser sintering of nano-hydroxyapatite coated polyamide 12 powders Hui, D. Goodridge, R.D. Scotchford, C.A. Grant, D.M. As part of a larger study on the laser sintering (LS) of nano-composite structures for biomedical applications, a wet mixing method was used to coat Polyamide 12 (PA12) particles with nano-hydroxyapatite (nHA). The addition of nHA significantly affected powder processability due to laser absorption and heat transfer effects which led to part warping. This phenomenon has not been reported in other studies investigating LS of polymer/HA and nHA powders. Nano-composites containing 0.5–1.5 wt% nHA were successfully produced and tensile testing showed that 0.5 wt% nHA provided the greatest reinforcement with a 20% and 15% increase in modulus and strength respectively. However, the elongation at break had significantly declined which was likely due to the formation of nHA aggregates at the sintering borders following the processing of the coated powders despite being initially well dispersed on the particle surface. Elsevier 2018-08-30 Article PeerReviewed Hui, D., Goodridge, R.D., Scotchford, C.A. and Grant, D.M. (2018) Laser sintering of nano-hydroxyapatite coated polyamide 12 powders. Additive Manufacturing, 22 . pp. 560-570. ISSN 2214-8604 https://www.sciencedirect.com/science/article/pii/S2214860417301082?via%3Dihub doi:10.1016/j.addma.2018.05.045 doi:10.1016/j.addma.2018.05.045 |
| spellingShingle | Hui, D. Goodridge, R.D. Scotchford, C.A. Grant, D.M. Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title | Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title_full | Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title_fullStr | Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title_full_unstemmed | Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title_short | Laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| title_sort | laser sintering of nano-hydroxyapatite coated polyamide 12 powders |
| url | https://eprints.nottingham.ac.uk/53171/ https://eprints.nottingham.ac.uk/53171/ https://eprints.nottingham.ac.uk/53171/ |