Amino-functionalized multiple-walled carbon nanotubes-polyimide nanocomposite films fabricated byin situpolymerization

2008 ◽  
Vol 110 (2) ◽  
pp. 701-705 ◽  
Author(s):  
Yizhe Hu ◽  
Liping Wu ◽  
Jianfeng Shen ◽  
Mingxing Ye
Keyword(s):  
Carbon Nanotubes ◽  
Nanocomposite Films ◽  
Polyimide Nanocomposite ◽  
Walled Carbon Nanotubes

Synthesis and Characteristics of Multi-Walled Carbon Nanotubes-Polyimide Nanocomposite Films

2008 ◽  
Vol 8 (5) ◽  
pp. 2671-2675 ◽  
Author(s):  
Mei-Hui Tsai ◽  
Dong-Sen Chen ◽  
Pei-Chun Chiang ◽  
Hsin-Chuan Lin ◽  
Jih-Mirn Jehng
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Nanocomposite Film ◽  
Chemical Vapor ◽  
Mechanical Analysis ◽  
Nanocomposite Films ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Polyimide Nanocomposite ◽  
Walled Carbon Nanotubes

The polyimide/multi-walled carbon nanotubes (PI/MWNTs) nanocomposite film has been successfully synthesized in this study. The source of MWNTs is prepared by chemical vapor deposition (CVD) method. Then the MWNTs are washed with acid for purification before being added into the polymer matrix. The acid-modified procedure aids in dispersing MWNTs in N,N-dimethylacetamide (DMAc) solvent. Based on the results of field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), the MWNTs are embedded in PI and well-dispersed within the PI matrix. The dynamic mechanical analysis (DMA) shows that the storage modulus of nanocomposite film is increased by 68% with the addition of 1 wt% MWNTs into PI. The nanocomposite films start to decompose at or above 400 °C and lose 5% of its weight at 545 °C according to thermogravimetric analysis (TGA). Meanwhile, the electrical conductivity of the nanocomposite film with 3 wt% MWNTs, is raised more than 10 orders of magnitude from 10−15 to 10−5 S/cm.

Conductive nanocomposite films based on functionalized double-walled carbon nanotubes dispersed in PEDOT:PSS

2012 ◽  
Author(s):  
A. De Girolamo Del Mauro ◽  
G. Nenna ◽  
I. A. Grimaldi ◽  
F. Villani ◽  
G. Pandolfi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Nanocomposite Films ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Chromatic Conductive Polymer Nanocomposites of Poly (p-Phenylene Ethynylene)s and Single-Walled Carbon Nanotubes

2021 ◽  
Vol 5 (6) ◽  
pp. 158
Author(s):  
Shanju Zhang ◽  
Uwe H. F. Bunz ◽  
David G. Bucknall
Keyword(s):  
Carbon Nanotubes ◽  
Conductive Polymer ◽  
Single Walled Carbon Nanotubes ◽  
Nanocomposite Films ◽  
High Mass ◽  
Phenylene Ethynylene ◽  
High Concentration ◽  
Visible Absorption ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

We report on dispersions and thin films of chromatic conductive nanocomposites of poly(p-phenylene ethynylene)s (PPEs) and single-walled carbon nanotubes (SWNTs) generated via solution mixing. The linear, conjugated PPEs with dialkyl- and dialkyloxy-side chain groups are shown to debundle and disperse high concentration (up to 2.5 mg/mL) SWNTs in various organic solvents. The solubilization of SWNTs and PPE wrapping is accompanied with the change in the solution color. Ultraviolet visible absorption spectra of nanocomposite solutions demonstrate a new absorption peak at a higher wavelength, supporting the observed chromatism. Fluorescence spectra of nanocomposite solutions display significant quenching of the fluorescence intensity and the Stern–Volmer model is used to analyze fluorescence quenching. Electron microscopy of the chromatic solid films of high mass fraction PPE/SWNT nanocomposites obtained by vacuum filtration reveals the debundled SWNTs in the PPE matrix. The tensile strength and Young’s modulus of these PPE/SWNT nanocomposite films are as high as 150 MPa and 15 GPa, respectively. The composite films exhibit remarkably high conductivities, ranging from ~1000 S/m to ~10,000 S/m for 10 wt% and 60 wt% SWNT nanocomposites, respectively.

scholarly journals Structure and electrical conductivity of polyvinyl alcohol films with multi-walled carbon nanotubes, cured in a magnetic field

2021 ◽  
Vol 13 (4) ◽  
pp. 457-464
Author(s):  
Sergey V. Vasin ◽  
◽  
Azat M. Nizametdinov ◽  
Viacheslav A. Sergeev ◽  
Michael S. Efimov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polyvinyl Alcohol ◽  
Nanocomposite Films ◽  
Polymerization Process ◽  
Degree Of Orientation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Control Samples

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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