scholarly journals Synthesis and Characterizations of Poly(3-hexylthiophene) and Modified Carbon Nanotube Composites

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Mohammad Rezaul Karim
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Polymerization Process ◽  
Multiwall Carbon Nanotube ◽  
X Ray Diffraction ◽  
Nanotube Composites ◽  
Ft Ir ◽  
Carbon Nanotube Composites ◽  
Fourier Transfer Infrared Spectroscopy

Poly(3-hexylthiophene) and modified (functionalized and silanized) multiwall carbon nanotube (MWNT) nanocomposites have been prepared through in situ polymerization process in chloroform medium with FeCl3oxidant at room temperature. The composites are characterized through Fourier transfer infrared spectroscopy (FT-IR), Raman, and X-ray diffraction (XRD) measurements to probe the nature of interaction between the moieties. Optical properties of the composites are measured from ultraviolet-visible (UV-Vis) and photoluminescence (PL) spectroscopy. Conductivity of the composites is followed by four probe techniques to understand the conduction mechanism. The change (if any) in C=C symmetric and antisymmetric stretching frequencies in FT-IR, the shift in G band frequencies in Raman, any alterations inλmaxof UV-Vis, and PL spectroscopic measurements are monitored with modified MWNT loading in the polymer matrix.

Microwave absorption properties of magnetite multi-granule nanocluster–multiwall carbon nanotube composites

2019 ◽  
Vol 12 (02) ◽  
pp. 1950011
Author(s):  
Boo Hyun An ◽  
Bum Chul Park ◽  
Amarsingh Bhabu Kanagaraj ◽  
Prerna Chaturvedi ◽  
Hamad Al Yassi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Tape Casting ◽  
Granule Size ◽  
Multiwall Carbon Nanotube ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
X Band ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Multiwall Carbon

Fe3O4 multi-granule nanocluster–multiwall carbon nanotube composites for microwave absorbing applications are fabricated by the surface-engineered tape-casting method. The multi-granule nanoclusters are synthesized by a modified polyol hydrothermal method and characterized by transmission electron microscopy, X-ray diffraction and vibrating sample magnetometer. The complex permittivity and permeability of the composites with different granule size of nanoclusters are characterized in X-band range with the reflection method. The absorption peak of the composites are shifted from 11.1[Formula: see text]GHz to 11.51[Formula: see text]GHz as granule size increased from 18[Formula: see text]nm to 35[Formula: see text]nm.

Ethylene-co-Norbornene Copolymers Grafted Carbon Nanotube Composites by In Situ Polymerization

2012 ◽  
Vol 213 (6) ◽  
pp. 627-634 ◽  
Author(s):  
Laura Boggioni ◽  
Giulia Scalcione ◽  
Andrea Ravasio ◽  
Fabio Bertini ◽  
Cristina D'Arrigo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

Synthesis and Semiconductor Characteristics of Poly[(2-methoxy,5-octoxy)1,4- Phenylenevinylene-Carbon Nanotube Composites

2013 ◽  
Vol 651 ◽  
pp. 159-162 ◽  
Author(s):  
Wen Ding ◽  
Feng Yun ◽  
Zhong Xiao Song ◽  
Jin Hai Si ◽  
Chun Liang Liu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Gap ◽  
In Situ Polymerization ◽  
Blue Shift ◽  
Lumo Energy ◽  
Uv Absorption Spectra ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Functionalized Mwcnts

poly[(2-methoxy,5-octoxy)1,4- phenylenevinylene-carbon nanotube composites (MOPPV-CNTs) were synthetized by In-situ polymerization in the paper. The molecular structure and surface morphology of the nanocomposites were characterized by the TEM. The TEM results showed that the MOPPV coated on the CNTs forming Core-shell nanowires structure composite. The wavelength of UV-absorption spectra of the composites exhibited a blue shift caused by the functionalized MWCNTs. the energy gap of the composites were increased. The band structures of the composite were determined by using cyclic voltammetry, the result shown that the HOMO energy and the LUMO energy increased with the concentration of CNTS. The increase of LUMO energy would benefit for balance of the carries injection when the composites used in the optoelectronic devices.

Ag–Loaded Polypyrrole/Carbon Nanotube: One-Step In Situ Polymerization and Improved Capacitance

2012 ◽  
Vol 531 ◽  
pp. 35-38 ◽  
Author(s):  
Hong Yu Mi ◽  
You Long Xu
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Conductive Polymer ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
Electrochemical Reversibility ◽  
Nanotube Composites ◽  
One Step ◽  
Carbon Nanotube Composites

Ternary composites of Ag–loaded polypyrrole/carbon nanotube (Ag–PPy/CNT) are prepared using a one–step in situ polymerization. Ag nanoparticles are uniformly decorated on the core–shell PPy/CNT networks. This approach provides a simple, easily accessible strategy for preparing three–dimensional noble metal–conductive polymer–carbon nanotube composites. Electrochemical properties of Ag–loaded composites are evaluated to understand the effect of Ag on the structure and kinetic process of the composite. Results indicate that the composites have good electrochemical reversibility and high specific capacitance. The specific capacitiance of Ag–PPy/CNT composites are enhanced greatly from 206.7 F g–1 of PPy/CNT composites to 528.6 F g–1 at 3 mA cm–2. This demonstrates that combining nano–sized Ag with supercapacitor materials is very effective in promoting electrochemical performance of materials.

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