Deposition of Chitosan Layers on NiTi Shape Memory Alloy
The NiTi shape memory alloys have been known from their application in medicine for implants as well as parts of medical devices. However, nickel belongs to the family of elements, which are toxic. Apart from the fact that nickel ions are bonded with titanium into intermetallic phase, their presence...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2015-04-01
|
| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/amm.2015.60.issue-1/amm-2015-0027/amm-2015-0027.xml?format=INT |
| _version_ | 1818415546904870912 |
|---|---|
| author | Kowalski P. Łosiewicz B. Goryczka T. |
| author_facet | Kowalski P. Łosiewicz B. Goryczka T. |
| author_sort | Kowalski P. |
| collection | DOAJ |
| description | The NiTi shape memory alloys have been known from their application in medicine for implants as well as parts of medical devices. However, nickel belongs to the family of elements, which are toxic. Apart from the fact that nickel ions are bonded with titanium into intermetallic phase, their presence may cause allergy. In order to protect human body against release of nickel ions a surface of NiTi alloy can be modified with use of titanium nitrides, oxides or diamond-like layers. On the one hand the layers can play protective role but on the other hand they may influence shape memory behavior. Too stiff or too brittle layer can lead to limiting or completely blocking of the shape recovery. It was the reason to find more elastic covers for NiTi surface protection. This feature is characteristic for polymers, especially, biocompatible ones, which originate in nature. In the reported paper, the chitosan was applied as a deposited layer on surface of the NiTi shape memory alloy. Due to the fact that nature of shape memory effect is sensitive to thermo and/or mechanical treatments, the chitosan layer was deposited with use of electrophoresis carried out at room temperature. Various deposition parameters were checked and optimized. In result of that thin chitosan layer (0.45µm) was received on the NiTi alloy surface. The obtained layers were characterized by means of chemical and phase composition, as well as surface quality. It was found that smooth, elastic surface without cracks and/or inclusions can be produced applying 10V and relatively short deposition time - 30 seconds. |
| first_indexed | 2024-12-14T11:36:43Z |
| format | Article |
| id | doaj.art-04ecc4d9108f4bb7805c8250b322e3be |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-12-14T11:36:43Z |
| publishDate | 2015-04-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-04ecc4d9108f4bb7805c8250b322e3be2022-12-21T23:03:00ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092015-04-0160117117610.1515/amm-2015-0027amm-2015-0027Deposition of Chitosan Layers on NiTi Shape Memory AlloyKowalski P.0Łosiewicz B.1Goryczka T.2 INSTITUTE OF MATERIALS SCIENCE, UNIVERSITY OF SILESIA, 1A 75 PUŁKU PIECHOTY, 41-500 CHORZÓW, POLAND INSTITUTE OF MATERIALS SCIENCE, UNIVERSITY OF SILESIA, 1A 75 PUŁKU PIECHOTY, 41-500 CHORZÓW, POLAND INSTITUTE OF MATERIALS SCIENCE, UNIVERSITY OF SILESIA, 1A 75 PUŁKU PIECHOTY, 41-500 CHORZÓW, POLANDThe NiTi shape memory alloys have been known from their application in medicine for implants as well as parts of medical devices. However, nickel belongs to the family of elements, which are toxic. Apart from the fact that nickel ions are bonded with titanium into intermetallic phase, their presence may cause allergy. In order to protect human body against release of nickel ions a surface of NiTi alloy can be modified with use of titanium nitrides, oxides or diamond-like layers. On the one hand the layers can play protective role but on the other hand they may influence shape memory behavior. Too stiff or too brittle layer can lead to limiting or completely blocking of the shape recovery. It was the reason to find more elastic covers for NiTi surface protection. This feature is characteristic for polymers, especially, biocompatible ones, which originate in nature. In the reported paper, the chitosan was applied as a deposited layer on surface of the NiTi shape memory alloy. Due to the fact that nature of shape memory effect is sensitive to thermo and/or mechanical treatments, the chitosan layer was deposited with use of electrophoresis carried out at room temperature. Various deposition parameters were checked and optimized. In result of that thin chitosan layer (0.45µm) was received on the NiTi alloy surface. The obtained layers were characterized by means of chemical and phase composition, as well as surface quality. It was found that smooth, elastic surface without cracks and/or inclusions can be produced applying 10V and relatively short deposition time - 30 seconds.http://www.degruyter.com/view/j/amm.2015.60.issue-1/amm-2015-0027/amm-2015-0027.xml?format=INTsurface modificationchitosanNiTishape memory |
| spellingShingle | Kowalski P. Łosiewicz B. Goryczka T. Deposition of Chitosan Layers on NiTi Shape Memory Alloy Archives of Metallurgy and Materials surface modification chitosan NiTi shape memory |
| title | Deposition of Chitosan Layers on NiTi Shape Memory Alloy |
| title_full | Deposition of Chitosan Layers on NiTi Shape Memory Alloy |
| title_fullStr | Deposition of Chitosan Layers on NiTi Shape Memory Alloy |
| title_full_unstemmed | Deposition of Chitosan Layers on NiTi Shape Memory Alloy |
| title_short | Deposition of Chitosan Layers on NiTi Shape Memory Alloy |
| title_sort | deposition of chitosan layers on niti shape memory alloy |
| topic | surface modification chitosan NiTi shape memory |
| url | http://www.degruyter.com/view/j/amm.2015.60.issue-1/amm-2015-0027/amm-2015-0027.xml?format=INT |
| work_keys_str_mv | AT kowalskip depositionofchitosanlayersonnitishapememoryalloy AT łosiewiczb depositionofchitosanlayersonnitishapememoryalloy AT goryczkat depositionofchitosanlayersonnitishapememoryalloy |