scholarly journals Thermal and electrical characterization of polymer/carbon nanotubes composites with polyvinyl butyral matrix

2021 ◽  
Vol 12 (2) ◽  
pp. 98-103
Author(s):  
V. V. Trachevskiy ◽  
◽  
M. T. Kartel ◽  
Wang Bo ◽  
◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Composites ◽  
Polymer Matrix ◽  
Rapid Development ◽  
Electrical Characterization ◽  
High Strength ◽  
Polyvinyl Butyral ◽  
Modern Technology ◽  
Advantages And Disadvantages

The rapid development of modern technology requires new materials with predetermined properties. There is a need for materials with ultra-high strength, hardness, other characteristics and a common combination of these properties. The work was aimed at solving the problem of creating polymer composite materials that combine high physical and mechanical characteristics and thermal and electrical conductivity. Information was given on fillers, the use of which gives polymers thermal and electrical properties. Shown are the most commonly used in the composition of polymer composites fillers, advantages and disadvantages of each of the fillers. It was established that the use of carbon nanotubes allows obtaining polymer composites with the required performance characteristics. One of the problems when using nanoparticles as modifiers of reactive oligomers is their uniform distribution in the volume of the polymer matrix. Heterogeneity and uneven distribution of the dispersed phase can lead to dangerous defects in the material, so the technology of combining the nanofillers and the polymer matrix plays an important role. The possibility of obtaining polyvinyl butyral structured with carbon nanotubes in the process of its synthesis in the presence of carbon nanotubes was shown and the technological conditions of In situ synthesis are developed. Experimental samples of polyvinyl butyral structured with carbon nanotubes with high thermal and electrically conductive characteristics were obtained. Under optimal conditions of synthesis, in the obtained PVB samples structured with carbon nanotubes, the electrical conductivity of the composite increases by five orders of magnitude due to the high electrical conductivity of CNTs. For the obtained PVB, structured with carbon nanotubes, the fracture stress was significantly (by 62 %) increased, and the fracture deformation is reduced by approximately 38 %. The decrease in the deformation of the fracture during compression indicates an increase in the fragility of the polymer with the inclusion of CNTs. The prospects for the synthesis of polyvinyl butyral in the presence of carbon nanotubes to obtain a composite with a high level of achieved electrical and thermal conductivity were shown.

Improving Electrical Conductivity and Thermal Properties of Polymers by the Addition of Carbon Nanotubes as Fillers

MRS Bulletin ◽  
2007 ◽  
Vol 32 (4) ◽  
pp. 348-353 ◽  
Author(s):  
Karen I. Winey ◽  
Takashi Kashiwagi ◽  
Minfang Mu
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Composites ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Aspect Ratios ◽  
Polymer Properties ◽  
The Matrix ◽  
Conductivity Of Nanotubes

AbstractThe remarkable electrical and thermal conductivities of isolated carbon nanotubes have spurred worldwide interest in using nanotubes to enhance polymer properties. Electrical conductivity in nanotube/polymer composites is well described by percolation, where the presence of an interconnected nanotube network corresponds to a dramatic increase in electrical conductivity ranging from 10−5 S/cm to 1 S/cm. Given the high aspect ratios and small diameters of carbon nanotubes, percolation thresholds are often reported below 1 wt% although nanotube dispersion and alignment strongly influence this value. Increases in thermal conductivity are modest (∼3 times) because the inter facial thermal re sis tance between nanotubes is considerable and the thermal conductivity of nanotubes is only 104 greater than the polymer, which forces the matrix to contribute more toward the composite thermal conductivity, as compared to the contrast in electrical conductivity, >1014. The nanotube network is also valuable for improving flame-retardant efficiency by producing a protective nanotube residue. In this ar ticle, we highlight published research results that elucidate fundamental structure–property relationships pertaining to electrical, thermal, and/or flammability properties in numerous nanotube-containing polymer composites, so that specific applications can be targeted for future commercial success.

scholarly journals Review of Polymer Composites with Diverse Nanofillers for Electromagnetic Interference Shielding

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 541 ◽  
Author(s):  
Dimuthu Wanasinghe ◽  
Farhad Aslani ◽  
Guowei Ma ◽  
Daryoush Habibi
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Polymer Matrix ◽  
Electromagnetic Interference ◽  
Polymer Matrix Composites ◽  
Morphological Properties ◽  
Matrix Composites ◽  
Emi Shielding ◽  
Alternative Materials ◽  
Metallic Panels

Polymer matrix composites have generated a great deal of attention in recent decades in various fields due to numerous advantages polymer offer. The advancement of technology has led to stringent requirements in shielding materials as more and more electronic devices are known to cause electromagnetic interference (EMI) in other devices. The drive to fabricate alternative materials is generated by the shortcomings of the existing metallic panels. While polymers are more economical, easy to fabricate, and corrosion resistant, they are known to be inherent electrical insulators. Since high electrical conductivity is a sought after property of EMI shielding materials, polymers with fillers to increase their electrical conductivity are commonly investigated for EMI shielding. Recently, composites with nanofillers also have attracted attention due to the superior properties they provide compared to their micro counterparts. In this review polymer composites with various types of fillers have been analysed to assess the EMI shielding properties generated by each. Apart from the properties, the manufacturing processes and morphological properties of composites have been analysed in this review to find the best polymer matrix composites for EMI shielding.

scholarly journals Electrical conductivity and Raman imaging of double wall carbon nanotubes in a polymer matrix

2011 ◽  
Vol 71 (10) ◽  
pp. 1326-1330 ◽  
Author(s):  
Victoria Tishkova ◽  
Pierre-Ivan Raynal ◽  
Pascal Puech ◽  
Antoine Lonjon ◽  
Marion Le Fournier ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Matrix ◽  
Raman Imaging ◽  
Double Wall

Fabrication, Characterisation and Application of Carbon Nanotube Polymer Composites

2010 ◽  
Vol 139-141 ◽  
pp. 1-8 ◽  
Author(s):  
Liang Chi Zhang
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Mass Production ◽  
Low Cost ◽  
Stress Transfer ◽  
High Strength ◽  
Large Aspect Ratio ◽  
Interface Bonding ◽  
Research Challenges ◽  
Wear And Friction

Carbon nanotubes (CNTs) have been used in making composites because CNTs have high strength, large aspect-ratio and excellent thermal and electrical conductivity. However, to realize the wide applications of CNT composites, further R&D must be carried out. This review will discuss some fabrication, characterisation and application issues of CNT polymer composites. Aspects to outline are purification, dispersion, alignment, stress transfer, interface bonding, wear and friction and rheological properties. Some research challenges will be briefly highlighted as well, including the mass production of long and aligned CNTs at low cost, and the optimization of the microstructures, properties and functioning features of CNT composites.

scholarly journals Electrically Conductive Nanocomposites Polymer of Poly(Vinyl Alcohol)/Glutaraldehyde/Multiwalled Carbon Nanotubes: Preparation and Characterization

2018 ◽  
Vol 18 (3) ◽  
pp. 383 ◽  
Author(s):  
Fitri Khoerunnisa ◽  
Hendrawan Hendrawan ◽  
Yaya Sonjaya ◽  
Rizki Deli Hasanah
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Matrix ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Multiwalled Carbon ◽  
Electrically Conductive ◽  
X Ray ◽  
Conductive Nanocomposites

Electrically conductive nanocomposites polymer of poly(vinyl alcohol)/PVA, glutaraldehyde (GA) and multiwalled carbon nanotubes (MWCNT) has been successfully synthesized. The polymer nanocomposites were prepared by mixing PVA, GA (crosslinker), and MWCNT dispersion with an aid of ultrasonic homogenizer at 50 °C. The content of MWCNT, in particular, was varied in order to determine the effect of MWCNT on electrical conductivity of polymer composites. The polymer mixture was casted into a disc to obtain thin film. The electrical conductivity, surface morphology, and mechanical properties of the composites film were investigated by means of four probes method, FTIR spectroscopy, X-ray diffraction, SEM, AFM, and tensile strength measurement, respectively. It was found that the optimum composition of PVA (10%): GA (1%): MWCNT (1%) was 20:20:3 in volume ratio. The addition of MWCNT induced the electrically conductive network on polymer matrix where the electrical conductivity of nanocomposites film significantly increased up to 8.28 x 10-2 S/sq due to reduction of the contact resistance between conductive filler. Additionally, the mechanical strength of nanocomposites polymer were significantly increased as a result of MWCNT addition. Modification of morphological structure of composite film as indicated by FTIR spectra, X-ray diffraction patterns, SEM, and AFM images verified the effective MWCNT filler network in the polymer matrix.

The Influence of Carbon Nanotube Aspect Ratio on Thermal Conductivity Enhancement in Nanotube–Polymer Composites

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Rahul S. Kapadia ◽  
Brian M. Louie ◽  
Prabhakar R. Bandaru
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Polymer Composites ◽  
Polymer Matrix ◽  
Linear Increase ◽  
Interfacial Resistance ◽  
Multiwalled Carbon ◽  
Conductivity Enhancement

We report and model a linear increase in the thermal conductivity (κ) of polymer composites incorporated with relatively low length/diameter aspect ratio multiwalled carbon nanotubes (CNTs). There was no evidence of percolation-like behavior in the κ, at/close to the theoretically predicted threshold, which was attributed due to the interfacial resistance between the CNT and the polymer matrix. Concomitantly, the widely postulated high thermal conductivity of CNTs does not contribute to the net thermal conductivity of the composites. Through estimating the interfacial resistance and the thermal conductivity of the constituent CNTs, we conclude that our experimental and modeling approaches can be used to study thermal transport behavior in nanotube–polymer composites.

scholarly journals Modeling the effect of interfacial conductivity between polymer matrix and carbon nanotubes on the electrical conductivity of nanocomposites

RSC Advances ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 424-433
Author(s):  
Yasser Zare ◽  
Kyong Yop Rhee
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Polymer Matrix ◽  
Simple Equations

This article presents the role of interfacial conductivity between the polymer matrix and nanoparticles in the electrical conductivity of polymer carbon nanotube (CNT) nanocomposites (PCNT) by simple equations.

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