Polymer Nanohybrids With High Electrical Conductivities

2012 ◽  
Vol 1371 ◽  
Author(s):  
R. Yañez-Macías ◽  
P. González-Morones ◽  
C Ávila-Orta ◽  
S. Torres-Rincón ◽  
J. Valdéz-Garza ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Irradiation Time ◽  
Surface Conductivity ◽  
The Other ◽  
Multiwalled Carbon ◽  
Electrical Conductivities ◽  
Opposite Behavior

ABSTRACTMultiwalled carbon nanotube (MWCNT)/Nylon-6 nanohybrids were prepared by in situ polymerization under microwave irradiation. The effect of time and power of irradiation on the surface conductivity of the nanohybrid was studied. It was observed that the resistivity increases with irradiation time at low microwave power (200W). On the other hand, at high power (600W) an opposite behavior was observed. And at intermediate power (400W) the resistivity was independent of the irradiation time. Resistivity values range from 102 to 101 Ω/sq. This behavior was associated with the polymer nanocoating covering the surface of the carbon nanotubes.

scholarly journals Morphology of polyamide 6 confined into carbon nanotubes

2015 ◽  
Vol 33 (2) ◽  
pp. 306-311
Author(s):  
Agnieszka Piegat ◽  
Zygmunt Staniszewski ◽  
Artur Poeppel ◽  
Miroslawa El Fray
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Polyamide 6 ◽  
Multiwalled Carbon ◽  
Simple Method ◽  
Melt Compounding ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractThe preparation of polymer nanocomposites filled with carbon nanotubes requires the nanotubes to be uniformly dispersed and compatible with the polymer matrix. In this work we report a preparation method of polyamide 6 (PA 6) based nanocomposite containing multi-walled carbon nanotubes (MWCNT) without any additional surface modification and obtained by in situ polymerization, as a simple method for composites production. The process was assisted by ultrasounds prior to synthesis.With such a method, an interesting morphology of polyamide 6 confined into a multiwalled carbon nanotube as well as grafted on a carbon nanotube surface was observed. For comparative purpose, PA 6 nanocomposites were also prepared from commercially available master batch by melt compounding.

scholarly journals Rapid Coating of Aqueous Pearls with Carbon Nanotubes via In Situ Polymerization of Dopamine

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lin Rong ◽  
Xiaoqing Mu ◽  
Jinchao Zhao ◽  
Leping Huang ◽  
Mingqiao Ye ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
In Situ Polymerization ◽  
Adhesive Property ◽  
Loss Ratio ◽  
Multiwalled Carbon ◽  
Mild Conditions ◽  
Uniform Coating ◽  
Modification Process ◽  
Aqueous Core

Millimeter-scale calcium alginate aqueous core capsules (mm-CaSA-Caps) are suitable for embedding of temperature and chemical sensitive substances because of its excellent biocompatibility and biodegradability. In this study, mm-CaSA-Caps were coated with multiwalled carbon nanotubes (MWNTs) via in situ self-polymerization of dopamine (DA) under mild conditions. During the modification process, mm-CaSA-Caps transferred quickly from colorless and transparent capsules to dark and opaque “pearls” in 15 min. The obtained MWNTs-polydopamine- (PDA-) modified mm-CaSA-Caps (mm-MWNTs-PDA@CaSA-Caps) retained the spherical appearance of mm-CaSA-Caps with uniform coating of MWNTs-PDA. Obviously, the MWNTs were easily coated on the mm-PDA@CaSA-Caps due to the strong adhesive property of PDA. As the MWNTs content increased, the stacking density of MWNTs on surface of the mm-MWNTs-PDA@CaSA-Caps raised. The water loss ratio of mm-MWNTs-PDA@CaSA-Caps was enhanced ascribed to increasing the path length of water by raising stacking density of MWNTs. This study provided a new path for enhancement of the barrier property of hydrogel capsules.

Double-segregated multiwalled carbon nanotube/silicone composites with large electrical to thermal conductivity ratios via in-situ silicone emulsion polymerization

2020 ◽  
Vol 54 (23) ◽  
pp. 3447-3456
Author(s):  
Dongouk Kim ◽  
Sang-Eui Lee ◽  
Yoonchul Sohn
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Multiwalled Carbon Nanotube ◽  
Layer By Layer ◽  
Multiwalled Carbon ◽  
Water Solvent ◽  
Carbon Nanotube Network ◽  
Silicone Emulsion

Polymer composites with a high electrical conductivity ( σ) to thermal conductivity ( k) ratio have been intensively investigated in recent years. While highly conductive materials, such as metallic fillers or conducting polymers, were used to enhance σ, microstructural engineering was used to decrease k by forming porous structures, such as aerogels or 3D networks. These structures, however, were mechanically vulnerable and could only have limited applications. In this study, multiwalled carbon nanotube /silicone composites with a high σ/k ratio were developed by forming a double-segregated multiwalled carbon nanotube network in the porous body of the composites. The unique microstructure of the composites was created by a novel fabrication process: layer-by-layer deposition with in-situ polymerization of silicone emulsion particles dispersed in a water solvent. This novel process yielded very thick films, >200 µm, with high σ/k values, ∼2 × 104 (S/m)/(W/m·K). These high σ/k composites can be used for various applications, such as resistive heating elements, thermoelectric materials, and wearable thermotherapy.

In situ polymerization of ethylenedioxythiophene from sulfonated carbon nanotube templates: toward high efficiency ITO-free solar cells

2016 ◽  
Vol 4 (17) ◽  
pp. 6645-6652 ◽  
Author(s):  
Xiaotian Hu ◽  
Lie Chen ◽  
Licheng Tan ◽  
Ting Ji ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Carbon Nanotube ◽  
High Efficiency ◽  
In Situ Polymerization ◽  
Polystyrene Sulfonate

A fabrication of in situ poly(3,4-ethylenedioxythiophene):polystyrene sulfonate via a polymerization template of sulfonated carbon nanotubes is used for universal electrodes.

In situ polymerization approach to poly(arylene ether nitrile)-functionalized multiwalled carbon nanotube composite films: thermal, mechanical, dielectric, and electrical properties

2018 ◽  
Vol 25 (1) ◽  
pp. 25-29
Author(s):  
Jiachun Zhong ◽  
Heng Guo ◽  
Jian Yang ◽  
Xiaobo Liu
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Multiwalled Carbon Nanotube ◽  
Nucleophilic Aromatic Substitution ◽  
Aromatic Substitution ◽  
Multiwalled Carbon ◽  
Arylene Ether ◽  
Quality Dispersion

AbstractPoly(arylene ether nitrile) (PEN)-functionalized multiwalled carbon nanotube (MWNT) composites were successfully prepared via anin situpolymerization method based on the combination of nucleophilic aromatic substitution polymerization with simple acylate-functionalized MWNTs (MWNTs-COCl) in the presence of nitrile monomers. The structure and morphology of PEN-MWNT composites were characterized using Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The improvement in the thermal stability and mechanical properties of PEN-MWNT films was achieved because of the good-quality dispersion of MWNTs and strong interfacial interaction between the PEN matrix and MWNTs. The most important result is that the dielectric constant and electrical conductivity can be remarkably enhanced by a high MWNT content.

Preparation and Characterization of Multiwalled Carbon Nanotube/Poly(ε-Caprolactone) Composites via In Situ Polymerization

2007 ◽  
Vol 124-126 ◽  
pp. 1133-1136 ◽  
Author(s):  
Hun Sik Kim ◽  
Byung Hyun Park ◽  
Jin San Yoon ◽  
Hyoung Joon Jin
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Bulk Polymerization ◽  
General Purpose ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
The Matrix ◽  
Scanning Electron

Poly(ε-caprolactone)/multiwalled carbon nanotube (PCL/MWCNT) composites with different MWCNT contents were successfully prepared by in situ bulk polymerization, which could make them good competitors for commodity materials such as general purpose plastics, while allowing them to completely retain their biodegradability. The mechanical properties of the PCL/MWCNT composites were effectively increased due to the incorporation of the MWCNTs. The composites were characterized using scanning electron microscopy, in order to obtain information on the dispersion of the MWCNTs in the polymeric matrix. In the case where 0.5 wt% of MWCNTs were dispersed in the matrix, the strength and modulus of the composite increased by 23% and 71%, respectively. In addition, the dispersion of the MWCNTs in the PCL matrix resulted in a substantial decrease in the electrical resistivity of the composites being observed as the MWCNTs loading was increased from 0 wt% to 0.5 wt%.

Functionalisation of Microfluidic Channels with In Situ Grown Carbon Nanotubes

2005 ◽  
Vol 872 ◽  
Author(s):  
K. Gjerde ◽  
T. Schurmann ◽  
K.B.K. Teo ◽  
M. Aono ◽  
W.I. Milne ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Surface Properties ◽  
Microfluidic Channels ◽  
Electrical Field ◽  
Multiwalled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Local Distortions

AbstractWe present a new route towards customizing the surface properties of microfluidic channels, by a forest of in situ grown multiwalled carbon nanotubes (CNT). Local distortions of the electrical field direction are used to control the direction of the carbon nanotube growth.

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