Imperial College London
Alternate

Professor Natalie Stingelin

Faculty of Engineering, Department of Materials

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 6777n.stingelin-stutzmann Website

 
 
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Location

 

1.08Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Martin:2017:10.1021/acs.chemmater.6b05391,
author = {Martin, J and Iturrospe, A and Cavallaro, A and Arbe, A and Stingelin, N and Ezquerra, TA and Mijangos, C and Nogales, A},
doi = {10.1021/acs.chemmater.6b05391},
journal = {Chemistry of Materials},
pages = {3515--3525},
title = {Relaxations and relaxor-ferroelectric-like response of nanotubularly confined poly(vinylidene fluoride)},
url = {http://dx.doi.org/10.1021/acs.chemmater.6b05391},
volume = {29},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Herein, we elucidate the impact of tubular confinement on the structure and relaxation behavior of poly(vinylidene difluoride) (PVDF) and how these affect the para-/ferroelectric behavior of this polymer. We use PVDF nanotubes that were solidified in anodic aluminum oxide (AAO) templates. Dielectric spectroscopy measurements evidence a bimodal relaxation process for PVDF nanotubes: besides the bulk-like α-relaxation, we detect a notably slower relaxation that is associated with the PVDF regions of restricted dynamics at the interface with the AAO pore. Strikingly, both the bulk-like and the interfacial relaxation tend to become temperature independent as the temperature increases, a behavior that has been observed before in inorganic relaxor ferroelectrics. In line with this, we observe that the real part of the dielectric permittivity of the PVDF nanotubes exhibits a broad maximum when plotted against the temperature, which is, again, a typical feature of relaxor ferroelectrics. As such, we propose that, in nanotubular PVDF, ferroelectric-like nanodomains are formed in the amorphous phase regions adjacent to the AAO interface. These ferroelectric nanodomains may result from an anisotropic chain conformation and a preferred orientation of local dipoles due to selective H-bond formation between the PVDF macromolecues and the AAO walls. Such relaxor-ferroelectric-like behavior has not been observed for nonirradiated PVDF homopolymer; our findings thus may enable in the future alternative applications for this bulk commodity plastic, e.g., for the production of electrocaloric devices for solid-state refrigeration which benefit from a relaxor-ferroelectric-like response.
AU  - Martin,J
AU  - Iturrospe,A
AU  - Cavallaro,A
AU  - Arbe,A
AU  - Stingelin,N
AU  - Ezquerra,TA
AU  - Mijangos,C
AU  - Nogales,A
DO  - 10.1021/acs.chemmater.6b05391
EP  - 3525
PY  - 2017///
SN  - 1520-5002
SP  - 3515
TI  - Relaxations and relaxor-ferroelectric-like response of nanotubularly confined poly(vinylidene fluoride)
T2  - Chemistry of Materials
UR  - http://dx.doi.org/10.1021/acs.chemmater.6b05391
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000400233100020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/48554
VL  - 29
ER  -
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