Abstract
The nanocomposites based on thermosetting polyurethane (PU) matrix with 0.01–0.25 wt.% of multiwalled carbon nanotubes (MWCNTs), containing carboxyl, lactone or phenol groups on their surface, were prepared and explored. Their structural peculiarities by AFM, TEM and SEM, the thermodynamic miscibility, the dynamic (by DMA) and static mechanical properties as well as the dynamic heterogeneity and creep resistance (by creep rate spectroscopy, CRS) of the nanocomposites have been investigated. It was found that the functional groups for PU attachment that were covalently bonded to the MWCNT lattice possessed superior mechanical performance to the functional groups that were immobilised through van der Waals forces to the MWCNT surface. The thermodynamic calculations have shown that free energy of interaction between the carbon nanotubes with functionalized surfaces and PU matrix is negative for all types of nanofillers that assume the thermodynamic stability of these composites and high adhesion of PU to carbon nanotubes. The strong dependence between matrix dynamics and variations in the nanotube surface chemistry was demonstrated via the combined DMA-CRS approach. Only direct covalent bonding of the PU matrix to carbon nanotube lattice, which is free from fulvic acids, results in the dramatic changes in its glass transition dynamics even at low nanofiller content. Due to the change in fundamental interaction at the interfaces, two- or three-fold enhancement in the dynamic and static mechanical properties may be attained for low filler content thermosetting PU-MWCNT nanocomposites compared with those of neat PU matrix.
| Original language | English |
|---|---|
| Title of host publication | Nanochemistry, Biotechnology, Nanomaterials, and Their Applications - Selected Proceedings of the 5th International Conference Nanotechnology and Nanomaterials, NANO 2017 |
| Editors | Olena Fesenko, Leonid Yatsenko |
| Publisher | Springer Science and Business Media, LLC |
| Pages | 115-148 |
| Number of pages | 34 |
| Volume | 214 |
| ISBN (Print) | 9783319925660 |
| DOIs | |
| Publication status | Published - Jan 1 2018 |
| Event | 5th International Science and Practice Conference on Nanotechnology and Nanomaterials, NANO 2017 - Chernivtsi, Ukraine Duration: Aug 23 2017 → Aug 26 2017 |
Other
| Other | 5th International Science and Practice Conference on Nanotechnology and Nanomaterials, NANO 2017 |
|---|---|
| Country | Ukraine |
| City | Chernivtsi |
| Period | 8/23/17 → 8/26/17 |
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Keywords
- AFM
- Creep resistance
- Functionalized MWCNT
- Mechanical properties
- Nanocomposites
- Polyurethane matrix
- Segmental dynamics
- SEM
- TEM
- Thermodynamic miscibility
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Nanocomposites based on thermosetting polyurethane matrix and chemically modified multiwalled carbon nanotubes. / Karabanova, L. V.; Whitby, R. L.; Bershtein, V. A.; Yakushev, P. N.; Lloyd, A. W.; Mikhalovsky, Sergey.
Nanochemistry, Biotechnology, Nanomaterials, and Their Applications - Selected Proceedings of the 5th International Conference Nanotechnology and Nanomaterials, NANO 2017. ed. / Olena Fesenko; Leonid Yatsenko. Vol. 214 Springer Science and Business Media, LLC, 2018. p. 115-148.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Nanocomposites based on thermosetting polyurethane matrix and chemically modified multiwalled carbon nanotubes
AU - Karabanova, L. V.
AU - Whitby, R. L.
AU - Bershtein, V. A.
AU - Yakushev, P. N.
AU - Lloyd, A. W.
AU - Mikhalovsky, Sergey
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The nanocomposites based on thermosetting polyurethane (PU) matrix with 0.01–0.25 wt.% of multiwalled carbon nanotubes (MWCNTs), containing carboxyl, lactone or phenol groups on their surface, were prepared and explored. Their structural peculiarities by AFM, TEM and SEM, the thermodynamic miscibility, the dynamic (by DMA) and static mechanical properties as well as the dynamic heterogeneity and creep resistance (by creep rate spectroscopy, CRS) of the nanocomposites have been investigated. It was found that the functional groups for PU attachment that were covalently bonded to the MWCNT lattice possessed superior mechanical performance to the functional groups that were immobilised through van der Waals forces to the MWCNT surface. The thermodynamic calculations have shown that free energy of interaction between the carbon nanotubes with functionalized surfaces and PU matrix is negative for all types of nanofillers that assume the thermodynamic stability of these composites and high adhesion of PU to carbon nanotubes. The strong dependence between matrix dynamics and variations in the nanotube surface chemistry was demonstrated via the combined DMA-CRS approach. Only direct covalent bonding of the PU matrix to carbon nanotube lattice, which is free from fulvic acids, results in the dramatic changes in its glass transition dynamics even at low nanofiller content. Due to the change in fundamental interaction at the interfaces, two- or three-fold enhancement in the dynamic and static mechanical properties may be attained for low filler content thermosetting PU-MWCNT nanocomposites compared with those of neat PU matrix.
AB - The nanocomposites based on thermosetting polyurethane (PU) matrix with 0.01–0.25 wt.% of multiwalled carbon nanotubes (MWCNTs), containing carboxyl, lactone or phenol groups on their surface, were prepared and explored. Their structural peculiarities by AFM, TEM and SEM, the thermodynamic miscibility, the dynamic (by DMA) and static mechanical properties as well as the dynamic heterogeneity and creep resistance (by creep rate spectroscopy, CRS) of the nanocomposites have been investigated. It was found that the functional groups for PU attachment that were covalently bonded to the MWCNT lattice possessed superior mechanical performance to the functional groups that were immobilised through van der Waals forces to the MWCNT surface. The thermodynamic calculations have shown that free energy of interaction between the carbon nanotubes with functionalized surfaces and PU matrix is negative for all types of nanofillers that assume the thermodynamic stability of these composites and high adhesion of PU to carbon nanotubes. The strong dependence between matrix dynamics and variations in the nanotube surface chemistry was demonstrated via the combined DMA-CRS approach. Only direct covalent bonding of the PU matrix to carbon nanotube lattice, which is free from fulvic acids, results in the dramatic changes in its glass transition dynamics even at low nanofiller content. Due to the change in fundamental interaction at the interfaces, two- or three-fold enhancement in the dynamic and static mechanical properties may be attained for low filler content thermosetting PU-MWCNT nanocomposites compared with those of neat PU matrix.
KW - AFM
KW - Creep resistance
KW - Functionalized MWCNT
KW - Mechanical properties
KW - Nanocomposites
KW - Polyurethane matrix
KW - Segmental dynamics
KW - SEM
KW - TEM
KW - Thermodynamic miscibility
UR - http://www.scopus.com/inward/record.url?scp=85049654435&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049654435&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-92567-7_8
DO - 10.1007/978-3-319-92567-7_8
M3 - Conference contribution
SN - 9783319925660
VL - 214
SP - 115
EP - 148
BT - Nanochemistry, Biotechnology, Nanomaterials, and Their Applications - Selected Proceedings of the 5th International Conference Nanotechnology and Nanomaterials, NANO 2017
A2 - Fesenko, Olena
A2 - Yatsenko, Leonid
PB - Springer Science and Business Media, LLC
ER -