Synthesis, structural characterization, and tensile properties of fructose functionalized multi-walled carbon nanotubes/chitosan nanocomposite films

The results of the study of the effect of the permanent magnetic field of a neodymium magnet on the polymerization process and the electrophysical characteristics of polyvinyl alcohol (PVA) films with the inclusion of multi-walled carbon nanotubes (MWCNTs) are presented. When studying the morphology of films using a scanning electron microscope, it was found that nanocomposite films with a thickness of 30 microns, cured in the presence of a magnetic field with the direction of the magnetic induction vector perpendicular to the surface of the films, have a homogeneous structure, while a significant number of MWCNTs agglomerations are observed in control samples of films. Measurements of the conductivity of films in the direction of the MWCNTs orientation at direct and alternating current showed that the conductivity of films obtained in a magnetic field significantly (by almost two orders of magnitude) exceeds the conductivity of control samples. The obtained results are analyzed on the basis of known models of electrical conductivity of nanocomposites with oriented MWCNTs. The degree of orientation of the MWCNTs during the curing of films in a magnetic field is estimated, taking into account the increase in the viscosity of the nanocomposite during the curing process.

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Improvement of tensile properties of poly(methyl methacrylate) by dispersing multi-walled carbon nanotubes functionalized with poly(3-hexylthiophene)-graft-poly(methyl methacrylate)

Composites Science and Technology ◽

10.1016/j.compscitech.2008.03.008 ◽

2008 ◽

Vol 68 (9) ◽

pp. 2120-2124 ◽

Cited By ~ 53

Author(s):

K KIM ◽

W JO

Keyword(s):

Carbon Nanotubes ◽

Methyl Methacrylate ◽

Tensile Properties ◽

Poly Methyl Methacrylate ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Key factors limiting carbon nanotube strength: Structural characterization and mechanical properties of multi-walled carbon nanotubes

Mechanical Engineering Journal ◽

10.1299/mej.17-00029 ◽

2017 ◽

Vol 4 (5) ◽

pp. 17-00029-17-00029 ◽

Cited By ~ 8

Author(s):

Keiichi SHIRASU ◽

Itaru TAMAKI ◽

Takamichi MIYAZAKI ◽

Go YAMAMOTO ◽

Raman BEKAREVICH ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Carbon Nanotube ◽

Structural Characterization ◽

Key Factors ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Enhanced Tensile Properties of Multi-Walled Carbon Nanotubes Filled Polyamide 6 Composites Based on Interface Modification and Reactive Extrusion

Polymers ◽

10.3390/polym12050997 ◽

2020 ◽

Vol 12 (5) ◽

pp. 997

Author(s):

Min Park ◽

Ji-un Jang ◽

Jong Hyuk Park ◽

Jaesang Yu ◽

Seong Yun Kim

Keyword(s):

Carbon Nanotubes ◽

Tensile Properties ◽

Ring Opening ◽

Reactive Extrusion ◽

Polyamide 6 ◽

Ring Opening Polymerization ◽

Uniform Dispersion ◽

Multi Walled Carbon Nanotubes ◽

Anionic Ring ◽

Walled Carbon Nanotubes

To induce uniform dispersion and excellent interfacial properties, we adopted a strategy of combining both polyamide 6 (PA6) grafting for multi-walled carbon nanotubes (MWCNTs) and reactive extrusion of PA6 matrix, based on anionic ring-opening polymerization of ε-caprolactam (CL). Compared to –COOH and –NCO treatments of MWCNTs, enhanced MWCNT dispersion and tensile properties of the composites were achieved using the applied strategy, and the tensile strength and modulus of the PA6-grafted MWCNT-filled PA6 composites were 5.3% and 20.5% higher than those of the purified MWCNT-filled PA6 composites, respectively. In addition, they were almost similar to the theoretical ones calculated by the modified Mori–Tanaka method (MTM) assuming a perfect interface, indicating that the tensile properties of MWCNT-filled PA6 composites can be optimized by PA6 grafting and reactive extrusion based on the anionic ring-opening polymerization of CL due to uniform MWCNT dispersion and excellent interfacial property.

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