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Titanate nanotubes and nanosheets as a mechanical reinforcement of water-soluble polyamic acid: experimental and theoretical studies

Titanate nanotubes and nanosheets as a mechanical reinforcement of water-soluble polyamic acid: experimental and theoretical studies
Titanate nanotubes and nanosheets as a mechanical reinforcement of water-soluble polyamic acid: experimental and theoretical studies
Titanate nanosheets (TiNS), titanate nanotubes (TiNT), and scrolled titanate nanosheets (STiNS) were used to synthesise polymer nanocomposites by solution processing. The hardness was found to increase by 90% on addition of 2% TiNS while the modulus (Er) increased by 103% compared to the pure polymer. Small angle X-ray scattering (SAXS) measurements of composite films were used to study alignment of nanostructures within the polymer. The obtained data on mechanical properties of composites have been tested against theoretical values and it was established that both nanostructures alignment as well as their mechanical properties affect the hardness and modulus of the polymer composites. At a low content of TiNS, the reinforcement behaviour matched well with Halpin-Tsai theory which assumes the filler has unidirectional orientation. After addition of 2 wt% TiNT, the hardness and modulus of the polyamic acid salt composites increased by 91% and 165%, respectively, and were higher than theoretical predictions, indicating that both TiNT and STiNS, prepared by hydrothermal synthesis, may have higher mechanical properties than bulk TiO2. At a high filler loading (>2 wt%), the mechanical properties of composites do not fit established theories due to agglomeration of titanate nanostructures.
Nanostructures, Poymer-matrix composites (PMCs), Mechanical Properties, Micro-mechanics
1359-8368
54-63
Harito, Christian
d146fa4e-fa33-40fc-b4b2-f4a77e0e75e6
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
Harito, Christian
d146fa4e-fa33-40fc-b4b2-f4a77e0e75e6
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2

Harito, Christian, Bavykin, Dmitry V., Light, Mark E. and Walsh, Frank C. (2017) Titanate nanotubes and nanosheets as a mechanical reinforcement of water-soluble polyamic acid: experimental and theoretical studies. Composites Part B: Engineering, 124, 54-63. (doi:10.1016/j.compositesb.2017.05.051).

Record type: Article

Abstract

Titanate nanosheets (TiNS), titanate nanotubes (TiNT), and scrolled titanate nanosheets (STiNS) were used to synthesise polymer nanocomposites by solution processing. The hardness was found to increase by 90% on addition of 2% TiNS while the modulus (Er) increased by 103% compared to the pure polymer. Small angle X-ray scattering (SAXS) measurements of composite films were used to study alignment of nanostructures within the polymer. The obtained data on mechanical properties of composites have been tested against theoretical values and it was established that both nanostructures alignment as well as their mechanical properties affect the hardness and modulus of the polymer composites. At a low content of TiNS, the reinforcement behaviour matched well with Halpin-Tsai theory which assumes the filler has unidirectional orientation. After addition of 2 wt% TiNT, the hardness and modulus of the polyamic acid salt composites increased by 91% and 165%, respectively, and were higher than theoretical predictions, indicating that both TiNT and STiNS, prepared by hydrothermal synthesis, may have higher mechanical properties than bulk TiO2. At a high filler loading (>2 wt%), the mechanical properties of composites do not fit established theories due to agglomeration of titanate nanostructures.

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Harito accepted manuscript - Accepted Manuscript
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More information

Accepted/In Press date: 13 May 2017
e-pub ahead of print date: 15 May 2017
Keywords: Nanostructures, Poymer-matrix composites (PMCs), Mechanical Properties, Micro-mechanics
Organisations: Characterisation and Analytics, Energy Technology Group, Southampton Marine & Maritime Institute, Education Hub

Identifiers

Local EPrints ID: 411266
URI: http://eprints.soton.ac.uk/id/eprint/411266
ISSN: 1359-8368
PURE UUID: 225b548b-bb26-4dea-8975-bad6e5de2bea
ORCID for Mark E. Light: ORCID iD orcid.org/0000-0002-0585-0843

Catalogue record

Date deposited: 16 Jun 2017 16:31
Last modified: 18 Feb 2021 16:52

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