Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating
Metal structures and polymers are susceptible to corrosion and degradation, which affect their mechanical properties, resulting in material failure. Protective coatings have been used widely to provide protection against corrosion and degradation caused by reaction in the presence of moisture and ox...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/147757 |
| _version_ | 1826125499049443328 |
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| author | Choo, Wan Luoh |
| author2 | Dong Zhili |
| author_facet | Dong Zhili Choo, Wan Luoh |
| author_sort | Choo, Wan Luoh |
| collection | NTU |
| description | Metal structures and polymers are susceptible to corrosion and degradation, which affect their mechanical properties, resulting in material failure. Protective coatings have been used widely to provide protection against corrosion and degradation caused by reaction in the presence of moisture and oxygen. However, because the maintenance and re-coating process of large ships and pipelines underwater are particularly difficult, there is still room for improvement in the role of the conventional coating. In addition, self-healing polyurea coating is gaining extensive attention due to its superior properties whereby manual maintenance is not required. Organic coating with microencapsulated drying oil as the healing agent has been extensively studied for its self-healing ability in air (atmospheric oxygen) but the study on its self-healing ability in water (dissolved oxygen) is still lacking.
This paper presents the efficiency of microcapsules fabricated and the healing ability of Polyurea. During fabrication, it is found that the fabrication method is not optimal as shown by the SEM image of a clustered microcapsules, despite FTIR analysis showing that the healing agent is well encapsulated. In addition, the ratio, as well as the type of components used in the fabrication of polyurea is not optimal, which affects the flexibility of polyurea (PUA-p-PDA). Nevertheless, results obtained for polyurea coating of different components (PUA-P1000) possesses high elasticity of 267.7 N and it also shows promising ability to self-heal after being cut into half.
The challenges and limitations faced for this project will enable future research to have a better reference to fabrication method and design of experiment. |
| first_indexed | 2024-10-01T06:37:37Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/147757 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:37:37Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1477572023-03-04T15:44:23Z Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating Choo, Wan Luoh Dong Zhili School of Materials Science and Engineering ZLDong@ntu.edu.sg Engineering::Materials::Material testing and characterization Metal structures and polymers are susceptible to corrosion and degradation, which affect their mechanical properties, resulting in material failure. Protective coatings have been used widely to provide protection against corrosion and degradation caused by reaction in the presence of moisture and oxygen. However, because the maintenance and re-coating process of large ships and pipelines underwater are particularly difficult, there is still room for improvement in the role of the conventional coating. In addition, self-healing polyurea coating is gaining extensive attention due to its superior properties whereby manual maintenance is not required. Organic coating with microencapsulated drying oil as the healing agent has been extensively studied for its self-healing ability in air (atmospheric oxygen) but the study on its self-healing ability in water (dissolved oxygen) is still lacking. This paper presents the efficiency of microcapsules fabricated and the healing ability of Polyurea. During fabrication, it is found that the fabrication method is not optimal as shown by the SEM image of a clustered microcapsules, despite FTIR analysis showing that the healing agent is well encapsulated. In addition, the ratio, as well as the type of components used in the fabrication of polyurea is not optimal, which affects the flexibility of polyurea (PUA-p-PDA). Nevertheless, results obtained for polyurea coating of different components (PUA-P1000) possesses high elasticity of 267.7 N and it also shows promising ability to self-heal after being cut into half. The challenges and limitations faced for this project will enable future research to have a better reference to fabrication method and design of experiment. Bachelor of Engineering (Materials Engineering) 2021-04-13T06:46:58Z 2021-04-13T06:46:58Z 2021 Final Year Project (FYP) Choo, W. L. (2021). Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/147757 https://hdl.handle.net/10356/147757 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials::Material testing and characterization Choo, Wan Luoh Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title | Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title_full | Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title_fullStr | Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title_full_unstemmed | Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title_short | Extrinsic conditions for the occurrence & characterizations of self-healing polyurea coating |
| title_sort | extrinsic conditions for the occurrence characterizations of self healing polyurea coating |
| topic | Engineering::Materials::Material testing and characterization |
| url | https://hdl.handle.net/10356/147757 |
| work_keys_str_mv | AT choowanluoh extrinsicconditionsfortheoccurrencecharacterizationsofselfhealingpolyureacoating |