scholarly journals Percolation analysis of the electrical conductive network in a polymer nanocomposite by nanorod functionalization

RSC Advances ◽  
2019 ◽  
Vol 9 (62) ◽  
pp. 36324-36333 ◽  
Author(s):  
Ruibin Ma ◽  
Guangyao Mu ◽  
Huan Zhang ◽  
Jun Liu ◽  
Yangyang Gao ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Conductive Network ◽  
Effective Strategy ◽  
Chemical Functionalization ◽  
The Matrix

Chemical functionalization of nanofillers is an effective strategy to benefit the formation of the conductive network in the matrix which can enhance the electrical conductivity of polymer nanocomposites (PNCs).

Molecular dynamics simulation of the electrical conductive network formation of polymer nanocomposites with polymer-grafted nanorods

2018 ◽  
Vol 20 (34) ◽  
pp. 21822-21831 ◽  
Author(s):  
Fanzhu Li ◽  
Xiaohui Duan ◽  
Huan Zhang ◽  
Bin Li ◽  
Jun Liu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Electrical Conductivity ◽  
Molecular Dynamics Simulation ◽  
Polymer Nanocomposites ◽  
Network Formation ◽  
Dynamics Simulation ◽  
Conductive Network ◽  
Effective Strategy ◽  
High Electrical Conductivity ◽  
And Control

Grafting chains on the surface of a filler is an effective strategy to tune and control the filler conductive network, which can be utilized to fabricate polymer nanocomposites (PNCs) with high electrical conductivity.

EFFECT OF THE NANOFILLER SHAPE ON THE CONDUCTIVE NETWORK FORMATION OF POLYMER NANOCOMPOSITES VIA A COARSE-GRAINED SIMULATION

2018 ◽  
Vol 91 (4) ◽  
pp. 757-766 ◽  
Author(s):  
Fanzhu Li ◽  
Huan Zhang ◽  
Tiantian Li ◽  
Jun Liu ◽  
Yangyang Gao ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Network Formation ◽  
Dynamics Simulation ◽  
Coarse Grained ◽  
Radius Of Gyration ◽  
Conductive Network ◽  
The Matrix ◽  
Dispersion State ◽  
Conductive Property ◽  
The Relationship

ABSTRACT It is very important to improve the electrical conductivity of polymer nanocomposites, which can widen their application. The effect of the nanofiller shape on the relationship between the nanofiller microstructure and the conductive probability of the nanofiller filled polymer nanocomposites (PNCs) has been investigated in detail by employing a coarse-grained molecular dynamics simulation. Four kinds of nanofiller shapes are considered: rod filler, Y filler, X filler, and sphere filler. First, the mean square radius of gyration gradually decreases from rod filler, Y filler, X filler, to sphere filler, which reflects the highest aspect ratio for rod filler. Meanwhile, the dispersion state of the nanofiller is relatively uniform in the matrix. The conductive probability (denoted by the formation probability of the conductive network) is adopted to stand for the conductive property. The results show that the conductive probability gradually decreases from rod filler, Y filler, X filler, to sphere filler, which is attributed to their gradually decreased size. In summary, the nanofiller shape affects the electric conductive property of PNCs.

Molecular dynamics simulation of the electrical conductive network formation of polymer nanocomposites by utilizing diblock copolymer-mediated nanoparticles

Soft Matter ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 6331-6339 ◽  
Author(s):  
Yangyang Gao ◽  
Xiaohui Duan ◽  
Peng Jiang ◽  
Huan Zhang ◽  
Jun Liu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Electrical Conductivity ◽  
Molecular Dynamics Simulation ◽  
Polymer Nanocomposites ◽  
Diblock Copolymer ◽  
Network Formation ◽  
Dynamics Simulation ◽  
Conductive Network ◽  
High Electrical Conductivity ◽  
Simple Method

It is a simple method to utilize diblock copolymer-mediated nanoparticles to control the conductive network formation, which can help to design the nanocomposites with the high electrical conductivity, especially the anisotropy.

Improvement on Dispersion of Carbon Nanotubes in Polymer Matrix by Using the Solvent with a Low Boiling Point

2018 ◽  
Vol 939 ◽  
pp. 170-176
Author(s):  
Xiang Fu ◽  
Maximiano Ramos ◽  
Ahmed M. Al-Jumaily ◽  
Xi Yong Huang ◽  
Nargis Chowdhury
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Tensile Strength ◽  
Polymer Nanocomposites ◽  
Boiling Point ◽  
Dispersion Method ◽  
Evaporation Time ◽  
Excellent Performance ◽  
The Matrix ◽  
Dispersion State

Polymer nanocomposites based on carbon nanotubes attract a great deal of attention recently due to their excellent performance. The dispersion state of CNTs embedded in the matrix is the primary and key issue to realize the potential of the nanocomposite. Here, this paper considers how the boiling point of solvent affects the performance of the nanocomposite when the ultrasonication dispersion method is employed. It is found that solvent with a low boiling point is conducive to save evaporation time so that CNTs can maintain the homogenous dispersion state as much as possible after ultrasonication. Therefore, the stretchability and tensile strength can be improved, while the electrical conductivity has an obvious enhancement as well.

scholarly journals Calculation of the Electrical Conductivity of Polymer Nanocomposites Assuming the Interphase Layer Surrounding Carbon Nanotubes

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 404 ◽  
Author(s):  
Yasser Zare ◽  
Kyong Yop Rhee
Keyword(s):  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Volume Fraction ◽  
Tunneling Effect ◽  
Interphase Layer ◽  
Conductive Network ◽  
Effective Volume ◽  
Effective Volume Fraction ◽  
Filler Fraction ◽  
High Fraction

The interphase layer surrounding nanoparticles can reflect the tunneling effect as the main mechanism of charge transferring in polymer/carbon nanotube (CNT) nanocomposites (PCNT). In this paper, the percolation threshold, effective volume fraction of CNT, and the portion of percolated filler after percolation are expressed by interphase and CNT waviness. Moreover, the developed terms are used to suggest the influences of CNT dimensions, interphase thickness, and waviness on the electrical conductivity of PCNT by conventional and developed models. Thin and long CNT, thick interphase, and low waviness obtain a high fraction of percolated CNT. However, the highest level of effective filler fraction is only calculated by the thinnest CNT and the thickest interphase. Furthermore, both models show that the thinnest and the longest CNT as well as the thickest interphase and the least CNT waviness cause the highest conductivity in PCNT, because they positively contribute to the formation and properties of the conductive network.

scholarly journals Entropic Effects in Polymer Nanocomposites

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 186 ◽  
Author(s):  
Xiaobin Dai ◽  
Cuiling Hou ◽  
Ziyang Xu ◽  
Ye Yang ◽  
Guolong Zhu ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Industrial Applications ◽  
Characteristic Parameters ◽  
Interparticle Interactions ◽  
Recent Advancement ◽  
The Matrix ◽  
Experimental Findings ◽  
Phase Behaviors ◽  
Entropic Effects

Polymer nanocomposite materials, consisting of a polymer matrix embedded with nanoscale fillers or additives that reinforce the inherent properties of the matrix polymer, play a key role in many industrial applications. Understanding of the relation between thermodynamic interactions and macroscopic morphologies of the composites allow for the optimization of design and mechanical processing. This review article summarizes the recent advancement in various aspects of entropic effects in polymer nanocomposites, and highlights molecular methods used to perform numerical simulations, morphologies and phase behaviors of polymer matrices and fillers, and characteristic parameters that significantly correlate with entropic interactions in polymer nanocomposites. Experimental findings and insight obtained from theories and simulations are combined to understand how the entropic effects are turned into effective interparticle interactions that can be harnessed for tailoring nanostructures of polymer nanocomposites.

Enhanced Electrical Properties of PVDF-TrFE Nanocomposite for Actuator Application

2014 ◽  
Vol 605 ◽  
pp. 335-339 ◽  
Author(s):  
Kie Yong Cho ◽  
A Ra Cho ◽  
Yun Jae Lee ◽  
Chong Min Koo ◽  
Soon Man Hong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Raman Spectroscopy ◽  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Casting Process ◽  
Polymer Nanocomposite ◽  
Solution Casting ◽  
Electromechanical Properties ◽  
Actuator Application

Carbon nanotubes (CNTs) coated by compatibilizer (P3HT-PMMA) imparted sta-ble dispersion in organic solvents and polymer matrix (P(VDF-TrFE)). The compatibility be-tween CNTs with P3HT-PMMA was con rmed by measuring Raman spectroscopy. CoatedCNTs were then blended with P(VDF-TrFE) (70:30 mol%) to obtain polymer nanocompositesby solution- casting process. Polymer nanocomposites showed enhanced electrical characteris-tics, as nanocomposites near the threshold of the transition between P(VDF-TrFE) insulatorand CNT conductor revealed great improvement of electrical conductivity up to 10-6 S/cmat 1 KHz. Electromechanical properties of the polymer nanocomposite were examined as afunction of electric eld.

scholarly journals Study of Electric Conductivity of Low-Density Polyethylene with Copper Nanoparticles

2021 ◽  
Vol 15 ◽  
pp. 1429-1435
Author(s):  
O. S. Tarasenko ◽  
Kyaw Ye Ko
Keyword(s):  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Temperature Shift ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Flow State ◽  
Low Frequencies ◽  
The Matrix ◽  
High Concentrations ◽  
Increasing Temperature

In this work, Cu/LLDPE composites are obtained and it is shown that the method of combining the formation of the composite and the nanodispersed phase in the viscous-flow state of the polymer makes it possible to achieve a uniform distribution of nanoparticles in the matrix. The dielectric properties of the composites have been investigated. A change in the mechanism of electrical conductivity was revealed when the concentration of the nanodispersed phase was varied. At low frequencies, nanocomposites of this type exhibit through conductivity. It was found that no pronounced relaxation peaks are observed in the studied polymer nanocomposites. However, at high concentrations of the added additive > 20%, two weakly pronounced peaks appear in the region of low and high temperatures, which, with increasing temperature, shift towards higher frequencies

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

scholarly journals A Review on Polymer Nanocomposites and Their Effective Applications in Membranes and Adsorbents for Water Treatment and Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 139
Author(s):  
Oluranti Agboola ◽  
Ojo Sunday Isaac Fayomi ◽  
Ayoola Ayodeji ◽  
Augustine Omoniyi Ayeni ◽  
Edith E. Alagbe ◽  
...  
Keyword(s):  
Greenhouse Gases ◽  
Polymer Nanocomposites ◽  
Gas Separation ◽  
Rapid Growth ◽  
Dye Removal ◽  
Anthropogenic Activities ◽  
Polymer Nanocomposite ◽  
Population Increase ◽  
Nanocomposite Membranes

Globally, environmental challenges have been recognised as a matter of concern. Among these challenges are the reduced availability and quality of drinking water, and greenhouse gases that give rise to change in climate by entrapping heat, which result in respirational illness from smog and air pollution. Globally, the rate of demand for the use of freshwater has outgrown the rate of population increase; as the rapid growth in town and cities place a huge pressure on neighbouring water resources. Besides, the rapid growth in anthropogenic activities, such as the generation of energy and its conveyance, release carbon dioxide and other greenhouse gases, warming the planet. Polymer nanocomposite has played a significant role in finding solutions to current environmental problems. It has found interest due to its high potential for the reduction of gas emission, and elimination of pollutants, heavy metals, dyes, and oil in wastewater. The revolution of integrating developed novel nanomaterials such as nanoparticles, carbon nanotubes, nanofibers and activated carbon, in polymers, have instigated revitalizing and favourable inventive nanotechnologies for the treatment of wastewater and gas separation. This review discusses the effective employment of polymer nanocomposites for environmental utilizations. Polymer nanocomposite membranes for wastewater treatment and gas separation were reviewed together with their mechanisms. The use of polymer nanocomposites as an adsorbent for toxic metals ions removal and an adsorbent for dye removal were also discussed, together with the mechanism of the adsorption process. Patents in the utilization of innovative polymeric nanocomposite membranes for environmental utilizations were discussed.

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