Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers
Piezoelectric fibers have an important role in wearable technology as energy generators and sensors. A series of hybrid nanocomposite piezoelectric fibers of polyinylidene fluoride (PVDF) loaded with barium–titanium oxide (BT) and reduced graphene oxide (rGO) were prepared via the melt spinning meth...
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/8/2153 |
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| author | Fatemeh Mokhtari Geoffrey M. Spinks Sepidar Sayyar Javad Foroughi |
| author_facet | Fatemeh Mokhtari Geoffrey M. Spinks Sepidar Sayyar Javad Foroughi |
| author_sort | Fatemeh Mokhtari |
| collection | DOAJ |
| description | Piezoelectric fibers have an important role in wearable technology as energy generators and sensors. A series of hybrid nanocomposite piezoelectric fibers of polyinylidene fluoride (PVDF) loaded with barium–titanium oxide (BT) and reduced graphene oxide (rGO) were prepared via the melt spinning method. Our previous studies show that high-performance fibers with 84% of the electroactive β-phase in the PVDF generated a peak output voltage up to 1.3 V and a power density of 3 W kg<sup>−1</sup>. Herein, the dynamic mechanical and creep behavior of these fibers were investigated to evaluate their durability and piezoelectric performance. Dynamic mechanical analysis (DMA) was used to provide phenomenological information regarding the viscoelastic properties of the fibers in the longitudinal direction. DSC and SEM were employed to characterize the crystalline structure of the samples. The storage modulus and the loss tangent increased by increasing the frequency over the temperature range (−50 to 150 °C) for all of the fibers. The storage modulus of the PVDF/rGO nanocomposite fibers had a higher value (7.5 GPa) in comparison with other fibers. The creep and creep recovery behavior of the PVDF/nanofillers in the nanocomposite fibers have been explored in the linear viscoelastic region at three different temperatures (10–130 °C). In the PVDF/rGO nanocomposite fibers, strong sheet/matrix interfacial interaction restricted the mobility of the polymer chains, which led to a higher modulus at temperatures 60 and 130 °C. |
| first_indexed | 2024-03-10T08:30:55Z |
| format | Article |
| id | doaj.art-1adf3d834e06450fb7e8196cdb9fcb89 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T08:30:55Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-1adf3d834e06450fb7e8196cdb9fcb892023-11-22T09:01:18ZengMDPI AGNanomaterials2079-49912021-08-01118215310.3390/nano11082153Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite FibersFatemeh Mokhtari0Geoffrey M. Spinks1Sepidar Sayyar2Javad Foroughi3Intelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2500, AustraliaIntelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2500, AustraliaIntelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2500, AustraliaSchool of Electrical, Computer and Telecommunications Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, AustraliaPiezoelectric fibers have an important role in wearable technology as energy generators and sensors. A series of hybrid nanocomposite piezoelectric fibers of polyinylidene fluoride (PVDF) loaded with barium–titanium oxide (BT) and reduced graphene oxide (rGO) were prepared via the melt spinning method. Our previous studies show that high-performance fibers with 84% of the electroactive β-phase in the PVDF generated a peak output voltage up to 1.3 V and a power density of 3 W kg<sup>−1</sup>. Herein, the dynamic mechanical and creep behavior of these fibers were investigated to evaluate their durability and piezoelectric performance. Dynamic mechanical analysis (DMA) was used to provide phenomenological information regarding the viscoelastic properties of the fibers in the longitudinal direction. DSC and SEM were employed to characterize the crystalline structure of the samples. The storage modulus and the loss tangent increased by increasing the frequency over the temperature range (−50 to 150 °C) for all of the fibers. The storage modulus of the PVDF/rGO nanocomposite fibers had a higher value (7.5 GPa) in comparison with other fibers. The creep and creep recovery behavior of the PVDF/nanofillers in the nanocomposite fibers have been explored in the linear viscoelastic region at three different temperatures (10–130 °C). In the PVDF/rGO nanocomposite fibers, strong sheet/matrix interfacial interaction restricted the mobility of the polymer chains, which led to a higher modulus at temperatures 60 and 130 °C.https://www.mdpi.com/2079-4991/11/8/2153polyvinylidene fluoride (PVDF)composite fiberspiezoelectricdynamic mechanical analysiscreepstorage modulus |
| spellingShingle | Fatemeh Mokhtari Geoffrey M. Spinks Sepidar Sayyar Javad Foroughi Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers Nanomaterials polyvinylidene fluoride (PVDF) composite fibers piezoelectric dynamic mechanical analysis creep storage modulus |
| title | Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers |
| title_full | Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers |
| title_fullStr | Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers |
| title_full_unstemmed | Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers |
| title_short | Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers |
| title_sort | dynamic mechanical and creep behaviour of meltspun pvdf nanocomposite fibers |
| topic | polyvinylidene fluoride (PVDF) composite fibers piezoelectric dynamic mechanical analysis creep storage modulus |
| url | https://www.mdpi.com/2079-4991/11/8/2153 |
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