The effect of salt on poly (vinylidene fluoride) polymorphs formation
Poly (vinylidene fluoride), PVDF, had been extensively studied due to their remarkable piezoelectricity, chemical resistance, good thermal stability and high dielectric strength. These properties provide a wide range of applications such as biotechnology, transducer materials, capacitor die...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2011
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| Online Access: | http://hdl.handle.net/10356/44039 |
| _version_ | 1826127726919024640 |
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| author | Tan, Li Yi. |
| author2 | Ng Hsiao Yen |
| author_facet | Ng Hsiao Yen Tan, Li Yi. |
| author_sort | Tan, Li Yi. |
| collection | NTU |
| description | Poly (vinylidene fluoride), PVDF, had been extensively studied due to their remarkable
piezoelectricity, chemical resistance, good thermal stability and high dielectric strength. These
properties provide a wide range of applications such as biotechnology, transducer materials,
capacitor dielectrics and also for biomedical sectors. In addition, its piezoelectricity may also
stimulate and retard cellular growth, thus a potential biomaterial. The main objective of this
report is to investigate the effects of different salts on the characteristic of PVDF films made
through solvent casting. Mono- and di-valent salt of the same anion (Cl-) were selected; NaCl,
KCl, MgCl2 and CaCl2. PVDF films, filled with mass fractions (wt ≤ 5%) of salts, were
characterized by Fourier Transform Infrared (FTIR) Spectroscopy, Differential Scanning
Calorimeter (DSC), Scanning Electron Microscope (SEM) and Thermogravimetric Analysis
(TGA) for its structural, morphology and thermal properties. It was revealed that fraction of β-
phase increased significantly with the addition of salt and this was strongly affected by the ions
size of the cations from the salt. This was because cation size and valency interaction play a
direct role in the ion-dipole interactions between the polymer and solvent. Thus, it was
concluded that smaller cations would induce larger fraction of β-phase in PVDF. |
| first_indexed | 2024-10-01T07:13:35Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/44039 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:13:35Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/440392023-03-04T15:40:02Z The effect of salt on poly (vinylidene fluoride) polymorphs formation Tan, Li Yi. Ng Hsiao Yen School of Materials Science and Engineering Ng Kee Woei DRNTU::Engineering::Materials::Organic/Polymer electronics Poly (vinylidene fluoride), PVDF, had been extensively studied due to their remarkable piezoelectricity, chemical resistance, good thermal stability and high dielectric strength. These properties provide a wide range of applications such as biotechnology, transducer materials, capacitor dielectrics and also for biomedical sectors. In addition, its piezoelectricity may also stimulate and retard cellular growth, thus a potential biomaterial. The main objective of this report is to investigate the effects of different salts on the characteristic of PVDF films made through solvent casting. Mono- and di-valent salt of the same anion (Cl-) were selected; NaCl, KCl, MgCl2 and CaCl2. PVDF films, filled with mass fractions (wt ≤ 5%) of salts, were characterized by Fourier Transform Infrared (FTIR) Spectroscopy, Differential Scanning Calorimeter (DSC), Scanning Electron Microscope (SEM) and Thermogravimetric Analysis (TGA) for its structural, morphology and thermal properties. It was revealed that fraction of β- phase increased significantly with the addition of salt and this was strongly affected by the ions size of the cations from the salt. This was because cation size and valency interaction play a direct role in the ion-dipole interactions between the polymer and solvent. Thus, it was concluded that smaller cations would induce larger fraction of β-phase in PVDF. Bachelor of Engineering (Materials Engineering) 2011-05-19T08:41:24Z 2011-05-19T08:41:24Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/44039 en Nanyang Technological University 35 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Organic/Polymer electronics Tan, Li Yi. The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title | The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title_full | The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title_fullStr | The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title_full_unstemmed | The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title_short | The effect of salt on poly (vinylidene fluoride) polymorphs formation |
| title_sort | effect of salt on poly vinylidene fluoride polymorphs formation |
| topic | DRNTU::Engineering::Materials::Organic/Polymer electronics |
| url | http://hdl.handle.net/10356/44039 |
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