Abstract
properties. The use of SWNTs as a reinforcement in polymer matrix is a hot research topic. However,
the poor dispersion of SWNTs in polymers and the weak interface between the nanotubes and
polymers are two major challenges which limit the use of SWNTs for reinforced polymer composites.
The main objectives of this PhD work are to design, fabricate SWNTs/polymer composites and
characterize the mechanical properties of the composite materials.
This study uses the Hansen solubility parameters (HSP) to predict the chemical compatibility
between polymer and SWNTs, and correlate the parameters with the dispersion of SWNTs and
interfacial properties between SWNTs and polymers. Several different surface modifications on
carbon nanotubes and different polymers are considered.
The dispersion of SWNTs in solvents is evaluated by Dynamic Light scattering (DLS). The
functional groups attached to SWNTs and degree of functionalization, and also the size of the
nanotubes affect the HSP of the SWNTs. The extent by which functionalization take place is affected
by the amount of defects on the nanotube surface.
The strain transfer from polymer matrix to nanotube fillers is evaluated by Raman spectroscopy.
The results are compared with the observation of the dispersion and Hansen Solubility Parameters. It
is found that a good strain transfer can be obtained when the SWNTs are well dispersed and also when
there is a good adhesion between the nanotube and the polymer. The effect of the viscoelastic
properties of polymers on the strain transfer is also discussed.
The mechanical properties of the polymers filled with SWNTs are compared with the neat
polymer. It is observed that in all the studied cases there is no obvious reinforcement of the polymer
by the addition of SWNTs. Existence of agglomerates, voids, and the lower glass transition
temperature of epoxy resin, may give the negative effect on the mechanical properties of
nanocomposite materials.
In the design aspect of the composite material, HSP could help match SWNTs modifications and
polymers, as well as choose the solvent used for the preparation of the composite material, which
could meet the requirement for good dispersion.
| Original language | English |
|---|
| Publisher | Department of Mechanical and Manufacturing Engineering, Aalborg University |
|---|---|
| Number of pages | 130 |
| ISBN (Print) | 87-91464-46-3 |
| Publication status | Published - 2014 |
Cite this
}
STUDY OF SINGLE WALLED CARBON NANOTUBE REINFORCED POLYMER COMPOSITES BY HANSEN SOLUBILITY PARAMETERS. / Ma, Jing.
Department of Mechanical and Manufacturing Engineering, Aalborg University, 2014. 130 p.Research output: Book/Report › Ph.D. thesis › Research
TY - BOOK
T1 - STUDY OF SINGLE WALLED CARBON NANOTUBE REINFORCED POLYMER COMPOSITES BY HANSEN SOLUBILITY PARAMETERS
AU - Ma, Jing
PY - 2014
Y1 - 2014
N2 - Single Walled carbon nanotubes (SWNTs) possess superior mechanical, thermal and electricalproperties. The use of SWNTs as a reinforcement in polymer matrix is a hot research topic. However,the poor dispersion of SWNTs in polymers and the weak interface between the nanotubes andpolymers are two major challenges which limit the use of SWNTs for reinforced polymer composites.The main objectives of this PhD work are to design, fabricate SWNTs/polymer composites andcharacterize the mechanical properties of the composite materials.This study uses the Hansen solubility parameters (HSP) to predict the chemical compatibilitybetween polymer and SWNTs, and correlate the parameters with the dispersion of SWNTs andinterfacial properties between SWNTs and polymers. Several different surface modifications oncarbon nanotubes and different polymers are considered.The dispersion of SWNTs in solvents is evaluated by Dynamic Light scattering (DLS). Thefunctional groups attached to SWNTs and degree of functionalization, and also the size of thenanotubes affect the HSP of the SWNTs. The extent by which functionalization take place is affectedby the amount of defects on the nanotube surface.The strain transfer from polymer matrix to nanotube fillers is evaluated by Raman spectroscopy.The results are compared with the observation of the dispersion and Hansen Solubility Parameters. Itis found that a good strain transfer can be obtained when the SWNTs are well dispersed and also whenthere is a good adhesion between the nanotube and the polymer. The effect of the viscoelasticproperties of polymers on the strain transfer is also discussed.The mechanical properties of the polymers filled with SWNTs are compared with the neatpolymer. It is observed that in all the studied cases there is no obvious reinforcement of the polymerby the addition of SWNTs. Existence of agglomerates, voids, and the lower glass transitiontemperature of epoxy resin, may give the negative effect on the mechanical properties ofnanocomposite materials.In the design aspect of the composite material, HSP could help match SWNTs modifications andpolymers, as well as choose the solvent used for the preparation of the composite material, whichcould meet the requirement for good dispersion.
AB - Single Walled carbon nanotubes (SWNTs) possess superior mechanical, thermal and electricalproperties. The use of SWNTs as a reinforcement in polymer matrix is a hot research topic. However,the poor dispersion of SWNTs in polymers and the weak interface between the nanotubes andpolymers are two major challenges which limit the use of SWNTs for reinforced polymer composites.The main objectives of this PhD work are to design, fabricate SWNTs/polymer composites andcharacterize the mechanical properties of the composite materials.This study uses the Hansen solubility parameters (HSP) to predict the chemical compatibilitybetween polymer and SWNTs, and correlate the parameters with the dispersion of SWNTs andinterfacial properties between SWNTs and polymers. Several different surface modifications oncarbon nanotubes and different polymers are considered.The dispersion of SWNTs in solvents is evaluated by Dynamic Light scattering (DLS). Thefunctional groups attached to SWNTs and degree of functionalization, and also the size of thenanotubes affect the HSP of the SWNTs. The extent by which functionalization take place is affectedby the amount of defects on the nanotube surface.The strain transfer from polymer matrix to nanotube fillers is evaluated by Raman spectroscopy.The results are compared with the observation of the dispersion and Hansen Solubility Parameters. Itis found that a good strain transfer can be obtained when the SWNTs are well dispersed and also whenthere is a good adhesion between the nanotube and the polymer. The effect of the viscoelasticproperties of polymers on the strain transfer is also discussed.The mechanical properties of the polymers filled with SWNTs are compared with the neatpolymer. It is observed that in all the studied cases there is no obvious reinforcement of the polymerby the addition of SWNTs. Existence of agglomerates, voids, and the lower glass transitiontemperature of epoxy resin, may give the negative effect on the mechanical properties ofnanocomposite materials.In the design aspect of the composite material, HSP could help match SWNTs modifications andpolymers, as well as choose the solvent used for the preparation of the composite material, whichcould meet the requirement for good dispersion.
M3 - Ph.D. thesis
SN - 87-91464-46-3
BT - STUDY OF SINGLE WALLED CARBON NANOTUBE REINFORCED POLYMER COMPOSITES BY HANSEN SOLUBILITY PARAMETERS
PB - Department of Mechanical and Manufacturing Engineering, Aalborg University
ER -