THE PROSPECTS OF USING CARBON NANOTUBES TO IMPART FUNCTIONAL PROPERTIES TO THE SURFACE OF POLYMER MATERIALS (review)

2021 ◽  
pp. 11-21
Author(s):  
L.V. Solovyanchik ◽  
◽  
S.V. Kondrashov ◽  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Functional Properties ◽  
Scientific Literature ◽  
Conductive Polymer ◽  
Polymer Materials ◽  
Mechanism Of Formation ◽  
Electrically Conductive ◽  
Structured Surface

Presents a review of the scientific literature on various methods for producing electrically conductive polymer materials and coatings. The prospects of using carbon nanotubes (CNT) to impart high electrical properties to the surface of materials are shown. The mechanism of formation of the structured surface of polymer materials with CNT is described. It is shown that the use of CNT is a promising way to impart electrically conductive and superhydrophobic properties to the surface.

Achieving electrical percolation in polymer-carbon nanotube composites

2003 ◽  
Vol 788 ◽  
Author(s):  
Sameer S. Rahatekar ◽  
M. Hamm ◽  
Milo S. P. Shaffer ◽  
James A. Elliott
Keyword(s):  
Electrical Properties ◽  
Polymer Matrix ◽  
Dissipative Particle Dynamics ◽  
Conductive Polymer ◽  
Process Variables ◽  
Electrically Conductive ◽  
Electrical Percolation ◽  
Mechanical And Electrical Properties ◽  
Nanotube Composites ◽  
Mesoscale Simulations

ABSTRACTThe addition of carbon nanotubes (CNTs) to a polymer matrix is expected to yield improvements in both mechanical and electrical properties. The focus of this paper is to give a snapshot of our current work on CNT-filled thermoplastic polymer textile fibers and the enhancement of their electrical properties. The challenge is to determine the type and size of nanotubes that are most effective for a given application, and how they should be dispersed or modified to interact with the polymer. The objective of this work is to develop an understanding of how the processing methods and properties of nanotube polymer composites are related to the geometry of the nanotubes used, their orientation, and their loading fraction. It will then be possible to design desired composite properties by controlling the relevant process variables.The research described in this paper primarily involves mesoscale simulations (dissipative particle dynamics) of packed assemblies of oriented CNTs suspended in a polymer matrix. Computer simulations have been carried out to study the effect of processing conditions, aspect ratio of CNTs and effect of electric field on electrical conductivity. The percolation threshold required to achieve an electrically conductive polymer-CNT fiber can be predicted for given set of process variables. The model predictions are compared with the predictions of classical percolation theory, and with experimental data from measurements of bulk resistivity from CNTs dispersed in thermoplastic polymers.

A Pressure Sensing Conductive Polymer Composite with Carbon Nanotubes for Biomechanical Applications

2013 ◽  
Vol 543 ◽  
pp. 43-46
Author(s):  
Anežka Lengálová ◽  
Petr Slobodian ◽  
Robert Olejnik ◽  
Pavel Riha
Keyword(s):  
Carbon Nanotubes ◽  
Knee Joint ◽  
Conductive Polymer ◽  
Sensing Element ◽  
Resistance Change ◽  
Electrically Conductive ◽  
Pressure Sensing ◽  
Practical Applications ◽  
Sensor Resistance ◽  
Simultaneous Measurements

A sensing element made of conductive composite created by an entangled network of electrically conductive carbon nanotubes embedded in polyurethane was used for simultaneous measurements of the pressure between the shoe and floor as well as the extension of the leg at the knee joint during marching. The results recorded as sensor resistance change show reasonable reversibility of the basic sensor characteristics, which gives potential for practical applications.

scholarly journals The Study of The Electrical Conductivity and Activation Energy on Conductive Polymer Materials

2021 ◽  
Vol 4 (2) ◽  
pp. 71
Author(s):  
Balqyz Lovelila Hermansyah Azari ◽  
Totok Wicaksono ◽  
Jihan Febryan Damayanti ◽  
Dheananda Fyora Hermansyah Azari
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Activated Carbon ◽  
Electrical Properties ◽  
Mass Fraction ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Conductivity Measurement ◽  
Polymer Materials ◽  
Electrical Conductivity Measurement

Conductive Polymers are one of the interesting topics to be developed in recent years. Conductive polymers can combine the properties of polymers and the electrical properties of metals. Research related to the electrical properties of conductive polymers, including electrical conductivity measurements and determination of activation energy has been carried out. This study aims to determine the effect of addition mass fraction of activated carbon into the nylon polymer on the conductive polymer material based on the electrical conductivity and activation energy. The variations of activated carbon used are 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% (wt/V). The conductive polymer from nylon polymer and activated carbon is made by casting solution method. The electrical conductivity measurement of the conductive polymer and the activation energy was carried out using the parallel plate method. The value of electrical conductivity increased from 5.62×10-9 ± 1.89×10-10 S/cm for the pure nylon to 2.51×10-8 ± 2.87×10-10 S/cm for the addition of mass fraction of activated carbon 8% wt/V. Meanwhile, there was a decrease in the addition of 9% wt/V and 10% wt/V of mass fraction of activated carbon, which were 2.36×10-8 ± 3.47×10-10 S/cm and 2.28×10-8 ± 4.01×10-10 S/cm. The activation energy of conductive polymer obtained decreased with increasing in the mass fraction of the activated carbon into the nylon polymer. The activation energy for the pure nylon was 0.0189 eV and 0.0127 eV for the addition of 8% wt/V mass fraction of activated carbon. Meanwhile, there was an increase in the addition of 9% wt/V and 10% wt/V mass fractions of activated carbon of 0.0145 eV and 0.0150 eV, respectively.

scholarly journals Selection of Immiscible Polymer Blends Filled with Carbon Nanotubes for Heating Applications

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1827 ◽  
Author(s):  
Marischal ◽  
Cayla ◽  
Lemort ◽  
Campagne ◽  
Devaux
Keyword(s):  
Carbon Nanotubes ◽  
Melt Spinning ◽  
Filler Content ◽  
Conductive Polymer ◽  
Polyamide 6 ◽  
Electrically Conductive ◽  
Joule Effect ◽  
Immiscible Blends ◽  
Selective Localization ◽  
Application Fields

In many application fields, such as medicine or sports, heating textiles use electrically conductive multifilaments. This multifilament can be developed from conductive polymer composites (CPC), which are blends of an insulating polymer filled with electrically conductive particles. However, this multifilament must have filler content above the percolation threshold, which leads to an increase of the viscosity and problems during the melt spinning process. Immiscible blends between two polymers (one being a CPC) can be used to allow the reduction of the global filler content if each polymer is co-continuous with a selective localization of the fillers in only one polymer. In this study, three immiscible blends were developed between polypropylene, polyethylene terephthalate, or polyamide 6 and a filled polycaprolactone with carbon nanotubes. The morphology of each blend at different ratios was studied using models of co-continuity and prediction of fillers localization according to viscosity, interfacial energy, elastic modulus, and loss factor of each polymer. This theoretical approach was compared to experimental values to find out differences between methods. The electrical properties (electrical conductivity and Joule effect) were also studied. The co-continuity, the selective localization in the polycaprolactone, and the Joule effect were only exhibited by the polypropylene/filled polycaprolactone 50/50 wt.%.

scholarly journals Latex-Based Polystyrene Nanocomposites with Non-Covalently Modified Carbon Nanotubes

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1168
Author(s):  
Jae-Phil Song ◽  
Sung-Ho Choi ◽  
Dae-Won Chung ◽  
Seong-Jae Lee
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Ethylene Glycol ◽  
Hydrophilic Polymers ◽  
Electrically Conductive ◽  
Surface Modified ◽  
Modified Carbon Nanotubes ◽  
Better Than

We prepared electrically conductive polystyrene (PS) nanocomposites by incorporating non-covalently surface-modified carbon nanotubes (CNTs) with hydrophilic polymers such as polydopamine (PDA) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Further, ethylene glycol (EG) was introduced as a second dopant to improve the electrical properties of the nanocomposites prepared with PEDOT:PSS-wrapped CNTs. All conductive PS nanocomposites were prepared through latex-based process, and the morphology and properties of the nanocomposites were investigated. The electrical properties of the nanocomposites with PEDOT:PSS-wrapped CNTs were better than those of the nanocomposites with PDA-coated CNTs owing to the conducting nature of PEDOT:PSS, although the dispersions of both types of modified CNTs in the PS matrix were excellent, as evidenced by morphology and rheology. In the case of PEDOT:PSS modification, the electrical properties of the nanocomposites with EG-doped PEDOT:PSS-wrapped CNTs were superior to those of the nanocomposites without EG treatment.

Reduced percolation threshold of multi-walled carbon nanotubes/polymer composites by filling aligned ferromagnetic particles

2019 ◽  
Vol 31 (2) ◽  
pp. 187-197
Author(s):  
Shuai Dong ◽  
Xuan Wu ◽  
Erhua Wang ◽  
Xiaojie Wang
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Percolation Threshold ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Iron Particles ◽  
Conductive Polymer Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Conductive polymer composites, consisting of multi-walled carbon nanotubes and a small amount of carbonyl iron particles, are fabricated under an ordinary magnetic field, to form anisotropic microstructures. The alignment of carbonyl iron particles will change the structure of a multi-walled carbon nanotube network and consequently the electrical properties of conductive polymer composites. In this research, we focus on the effect of the anisotropic microstructures on the electrical properties of the composites, especially on the percolation threshold and electrical resistivity. Monte Carlo simulations for three-dimensional stick percolation systems are performed to predict the percolation threshold of the anisotropic conductive polymer composites in terms of orientation distribution of multi-walled carbon nanotubes. In addition, an eight-chain model is proposed to investigate the influence of the anisotropic distribution of multi-walled carbon nanotubes on the electrical resistivity of the composites. It is predicted that the percolation threshold could be reduced from 0.70 vol% for the isotropic composites to 0.49 vol% for the anisotropic composites. Meanwhile, the electrical resistivity of the anisotropic composites is about 10%–20% of that of the isotropic composites when the volume fraction of multi-walled carbon nanotubes is higher than the percolation threshold. The simulation results are compared with the experimental study results that show a very similar behavior although there are some deviations in the values.

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