The Preparation and Properties of PEN/MWNT Nanocomposites

2010 ◽  
Vol 44 (21) ◽  
pp. 2453-2460 ◽  
Author(s):  
Jiachun Zhong ◽  
Wenjin Chen ◽  
Kun Jia ◽  
Xiaobo Liu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Sodium Dodecyl Sulfate ◽  
Rheological Behavior ◽  
Sodium Dodecyl ◽  
Ultrasound Treatment ◽  
Multiwalled Carbon ◽  
Content Ratio ◽  
Dispersion Agent ◽  
Mwnt Content

Polyarylene ether nitrile (PEN)/multiwalled carbon nanotube (MWNT) composites was prepared, and their rheological behavior and mechanical properties were studied. The PEN/MWNT composites have been fabricated via solution mixing by using ultrasound and dispersion agent, and then casting. This results show that the rheological and mechanical properties of the PEN/MWNT nanocomposites prepared by ultrasound treatment with sodium dodecyl sulfate increase more significantly than that of the ultrasound-treated PEN/MWNT composites and the untreated PEN/MWNT composites with the increase in the MWNT content. The rheological and mechanical properties of the PEN/MWNT composites were related with the content ratio of the MWNT and the preparation ways.

Drying of polyacrylamide-multiwalled carbon nanotube (MWNT) composites with various MWNTs contents: a fluorescence study

2013 ◽  
Vol 33 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Gülşen Akın Evingür ◽  
Önder Pekcan
Keyword(s):  
Carbon Nanotube ◽  
Moving Boundary ◽  
Fluorescence Probe ◽  
Threshold Value ◽  
Multiwalled Carbon Nanotube ◽  
Strongly Correlated ◽  
Multiwalled Carbon ◽  
Composite Gels ◽  
Volumetric Methods ◽  
Mwnt Content

Abstract We studied the drying of polyacrylamide (PAAm)-multiwalled carbon nanotube (MWNT) composites, prepared by free radical crosslinking copolymerization in water, with a steady state fluorescence technique. Composite gels were prepared at room temperature with pyranine (Py) doped as a fluorescence probe. Drying experiments were performed in air at various MWNT contents by real time monitoring of the Py fluorescence intensity (I) which increased as the drying proceeded. The Stern-Volmer equation, combined with the moving boundary diffusion model, was used to explain the behavior of I during drying. It was observed that the desorption coefficient (D) increased as the temperature increased. Drying energies (ΔE) were measured for the drying processes for each MWNT content gel, by using fluorescence, gravimetrical and volumetric methods. It is understood that ΔE values decrease by increasing MWNT content, until 1 wt% MWNT, and then increase above the level of this threshold value. The energy of drying is strongly correlated with the MWNT content in the composite. ΔE drops to its lowest value, at which conducting cluster starts to appear.

Mechanical Properties Of Polyaniline / Multi-walled Carbon Nanotube Composite Films

2003 ◽  
Vol 791 ◽  
Author(s):  
P. C. Ramamurthy ◽  
W. R. Harrell ◽  
R. V. Gregory ◽  
B. Sadanadan ◽  
A. M. Rao
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Weight Percent ◽  
Organic Electronic Devices ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotube ◽  
Contact Devices ◽  
Carbon Nanotube Composite

ABSTRACTHigh molecular weight polyaniline / multi-walled carbon nanotube composite films were fabricated using solution processing. Composite films with various weight percentages of multiwalled carbon nanotubes were fabricated. Physical properties of these composites were analyzed by thermogravimetric analysis, tensile testing, and scanning electron microscopy. These results indicate that the addition of multiwalled nanotubes to polyaniline significantly enhances the mechanical properties of the films. In addition, metal–semiconductor (composite) (MS) contact devices were fabricated, and it was observed that the current level in the films increased with increasing multiwalled nanotube content. Furthermore, it was observed that polyaniline containing one weight percent of carbon nanotubes appears to be the most promising composition for applications in organic electronic devices.

Electrical and mechanical properties of flexible multiwalled carbon nanotube/poly (dimethylsiloxane) based nanocomposite sheets

2021 ◽  
pp. 106550
Author(s):  
Leema Rose Viannie ◽  
N.R. Banapurmath ◽  
Manzoore Elahi M. Soudagar ◽  
Anilkumar V. Nandi ◽  
Nazia Hosain ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

Structural and mechanical properties of free-standing multiwalled carbon nanotube paper prepared by an aqueous mediated process

2017 ◽  
Vol 52 (12) ◽  
pp. 7503-7515 ◽  
Author(s):  
Sushant Sharma ◽  
Bhanu Pratap Singh ◽  
Arun Singh Babal ◽  
Satish Teotia ◽  
Jeevan Jyoti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Free Standing ◽  
Multiwalled Carbon

PROTEIN INFLUENCE ON THE MECHANICAL PROPERTIES OF NR

2021 ◽  
Author(s):  
Yayoi Akahori ◽  
Misao Hiza ◽  
Soki Yamaguchi ◽  
Seiichi Kawahara
Keyword(s):  
Mechanical Properties ◽  
Nmr Spectroscopy ◽  
Sodium Dodecyl Sulfate ◽  
Carbon Black ◽  
Natural Rubber ◽  
Hevea Brasiliensis ◽  
Sodium Dodecyl ◽  
Swelling Degree ◽  
Deproteinized Natural Rubber ◽  
Rubber State

ABSTRACT Protein effect on vulcanization of NR, obtained from Hevea brasiliensis, was investigated by analyzing the crosslinking structure of the resulting vulcanizates prepared from untreated NR, deproteinized natural rubber (DPNR), and protein-free natural rubber (PFNR) by swelling methods and rubber-state NMR spectroscopy. The proteins present in NR were removed by three methods: deproteinization with enzyme, urea, or urea–acetone in the presence of sodium dodecyl sulfate. The amount of proteins present in NR, approximately 0.238 w/w%, was reduced to 0.000 w/w% by urea–acetone deproteinization, whereas it was reduced to approximately 0.003 and 0.019 w/w% by enzyme and urea deproteinizations, respectively. Hardness, swelling degree, and crosslinking structure depended on the amount of proteins. Changes in mechanical properties for the vulcanizates prepared from not only non-filler compounds but also carbon black–filled and silica-filled compounds were attributed to the amount of proteins.

scholarly journals Characterization of Multiwalled Carbon Nanotube-Reinforced Hydroxyapatite Composites Consolidated by Spark Plasma Sintering

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Duk-Yeon Kim ◽  
Young-Hwan Han ◽  
Jun Hee Lee ◽  
Inn-Kyu Kang ◽  
Byung-Koog Jang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Pull Out ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Mwnt Content

Pure HA and 1, 3, 5, and 10 vol% multiwalled carbon nanotube- (MWNT-) reinforced hydroxyapatite (HA) were consolidated using a spark plasma sintering (SPS) technique. The relative density of pure HA increased with increasing sintering temperature, but that of the MWNT/HA composite reached almost full density at 900°C, and then decreased with further increases in sintering temperature. The relative density of the MWNT/HA composites increased with increasing MWNT content due to the excellent thermal conductivity of MWNTs. The grain size of MWNT/HA composites decreased with increasing MWNT content and increased with increasing sintering temperature. Pull-out toughening of the MWNTs of the MWNT/HA composites was observed in the fractured surface, which can be used to predict the improvement of the mechanical properties. On the other hand, the existence of undispersed or agglomerate MWNTs in the MWNT/HA composites accompanied large pores. The formation of large pores increased with increasing sintering temperature and MWNT content. The addition of MWNT in HA increased the hardness and fracture toughness by approximately 3~4 times, despite the presence of large pores produced by un-dispersed MWNTs. This provides strong evidence as to why the MWNTs are good candidates as reinforcements for strengthening the ceramic matrix. The MWNT/HA composites did not decompose during SPS sintering. The MWNT-reinforced HA composites were non-toxic and showed a good cell affinity and morphologyin vitrofor 1 day.

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