| Autor: |
Aishwarya, Ananya, Adaval, Akanksha, Mondal, Suvankar, Dasgupta, Titas, Bhattacharyya, Arup R. |
| Zdroj: |
Physical Chemistry Chemical Physics (PCCP); 11/7/2024, Vol. 26 Issue 41, p26314-26329, 16p |
| Abstrakt: |
The lithium salt of 6-amino hexanoic acid (Li–AHA) was melt-mixed with poly(vinylidene fluoride) (PVDF), wherein the Li–AHA concentration was varied between 1–15 wt% with the aim of establishing hydrogen bonding between the NH2 functionality of Li–AHA and the –CF2 moieties of PVDF. This was followed by compression-moulding as well as solution-casting to make PVDF/Li–AHA composite thin films. FTIR analysis established interactions between the –CF2 groups in PVDF with amine functional moieties of Li–AHA. Moreover, FTIR analysis estimated that the solution-cast PVDF/Li–AHA composite of 15 wt% Li–AHA exhibited the highest polar phase fraction of ∼60%. Furthermore, ferroelectric analysis showed that the solution-cast PVDF/Li–AHA composite of 15 wt% Li–AHA exhibited the highest remnant polarization of 0.07 μC cm−2 (at 50 Hz, 1000 V) from the polarization versus electric field loop. Finally, energy harvester devices were fabricated using compression-moulded and solution-cast PVDF/Li–AHA composite films, in which a maximum output voltage of ∼110 V was obtained in the solution-cast PVDF/Li–AHA composite of 15 wt% Li–AHA. The devices also displayed a maximum power density of 75 μW cm−2 and 85 μW cm−2 for those fabricated via compression-moulding and solution-casting, respectively. Three different capacitors were efficiently charged by the tapping of the devices made from solution-cast and compression-moulded composite films of 15 wt% Li–AHA. An interrelationship between processing, structure and properties was successfully established in the PVDF/Li–AHA composites with greatly enhanced piezoelectric properties. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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