Synthesis and characterization of polypyrrole nanofibers
Compared to other conducting polymers in their bulk form, polypyrrole nanofibers have shown higher sensitivities and faster responses as gaseous chemical sensors. However, the lack of a consistent and simple method to mass produce these nanofibers has prevented their incorporation into commercial de...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2010
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| Online Access: | http://hdl.handle.net/10356/36185 |
| _version_ | 1826121786741227520 |
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| author | Cai, Yutian |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Cai, Yutian |
| author_sort | Cai, Yutian |
| collection | NTU |
| description | Compared to other conducting polymers in their bulk form, polypyrrole nanofibers have shown higher sensitivities and faster responses as gaseous chemical sensors. However, the lack of a consistent and simple method to mass produce these nanofibers has prevented their incorporation into commercial devices. This project has produced polypyrrole nanofibers using a novel chemical oxidative polymerization method. Important parameters of the synthesis process are: (1) supersaturated melt of iron (III) chloride hexahydrate as an oxidant, (2) temperature of 50°C, (3) high oxidant to monomer ratio, (4) methanol as a solvent for pyrrole monomers and (5) the use of a stirring bar at 700rpm. The main mechanism for the formation of nanofibers is believed to be based on the rapid formation of bipyrrole and the pyrrole oligomers, which subsequently homogeneously nucleate and serve as growth centers. |
| first_indexed | 2024-10-01T05:37:53Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/36185 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:37:53Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/361852023-03-04T15:41:27Z Synthesis and characterization of polypyrrole nanofibers Cai, Yutian School of Materials Science and Engineering Zhang Qichun DRNTU::Engineering::Materials::Nanostructured materials Compared to other conducting polymers in their bulk form, polypyrrole nanofibers have shown higher sensitivities and faster responses as gaseous chemical sensors. However, the lack of a consistent and simple method to mass produce these nanofibers has prevented their incorporation into commercial devices. This project has produced polypyrrole nanofibers using a novel chemical oxidative polymerization method. Important parameters of the synthesis process are: (1) supersaturated melt of iron (III) chloride hexahydrate as an oxidant, (2) temperature of 50°C, (3) high oxidant to monomer ratio, (4) methanol as a solvent for pyrrole monomers and (5) the use of a stirring bar at 700rpm. The main mechanism for the formation of nanofibers is believed to be based on the rapid formation of bipyrrole and the pyrrole oligomers, which subsequently homogeneously nucleate and serve as growth centers. Bachelor of Engineering (Materials Engineering) 2010-04-23T05:47:18Z 2010-04-23T05:47:18Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/36185 en Nanyang Technological University 39 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Nanostructured materials Cai, Yutian Synthesis and characterization of polypyrrole nanofibers |
| title | Synthesis and characterization of polypyrrole nanofibers |
| title_full | Synthesis and characterization of polypyrrole nanofibers |
| title_fullStr | Synthesis and characterization of polypyrrole nanofibers |
| title_full_unstemmed | Synthesis and characterization of polypyrrole nanofibers |
| title_short | Synthesis and characterization of polypyrrole nanofibers |
| title_sort | synthesis and characterization of polypyrrole nanofibers |
| topic | DRNTU::Engineering::Materials::Nanostructured materials |
| url | http://hdl.handle.net/10356/36185 |
| work_keys_str_mv | AT caiyutian synthesisandcharacterizationofpolypyrrolenanofibers |