Electrical and Thermal Properties of Carbon Nanotube Polymer Composites with Various Aspect Ratios

Abstract

In response to the rising need for flexible and lightweight materials capable of efficient heat transport, many studies have been conducted to improve the thermal properties of polymers via nanofillers. Among the various nanofillers, carbon nanotubes (CNTs) are considered as the most promising, owing to their excellent thermal and electrical properties. Accordingly, CNT/polymer composites can be used as flexible and lightweight heat transfer materials, owing to their low density. In this study, we fabricated multi-walled CNT (MWCNT)/polymer composites with different aspect ratios to investigate their effects on electrical and thermal properties. Through a three-roll milling process, CNTs were uniformly dispersed in the polymer matrix to form a conductive network. Enhanced electrical and thermal properties were observed in MWCNT composite with a high aspect ratio as compared to those with a low aspect ratio. The thermal conductivity of composites obtained as a function of the filler content was also compared with the results of a theoretical prediction model.

Carbon Nanotubes (CNTs) Nanofluids Flow and Heat Transfer under MHD Effect over a Moving Surface

“…Carbon materials (such as carbon nanotubes (CNTs)), metal materials (such as copper (Cu)), semiconductor material (such as gallium nitride (GaN)) and polymer materials (such as polylactic acid (PLA)) have become the most favourable selection for preparing nanofluids [10]. Among them, CNTs nanofluids are considered as the best nanofluids as they are having the highest thermal conductivity compare to other nanoparticles [11][12]. Jiang et al, [13] suggested that CNTs became one of the effective materials providing higher thermal conductivity of nanofluids compared to other nanoparticles.…”

“…CNTs consist of carbon nanoparticles with common range in diameter from 0.5nm to 1.5nm and above 100nm for single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs), respectively. Basically, CNTs are constructed and rolled into a cylindrical shape by using one-dimensional graphene structures [12]. To produce CNTs nanofluids, CNTs are immersed in a base fluid such as water, oil and ethylene glycol.…”

Highly Stable MWCNT@NVP Composite as a Cathode Material for Na-Ion Batteries

“…25,26 Among all conductive networks, CNTs are considered to be fillers for composite formation because of their stability due to the sp 2 covalent bond. 27,28 Distinctly, multiwalled CNTs (MWCNTs) possess a promising conductive framework as well as act as a reducing agent (for V 5+ to V 3+ ) which provides a high surface area, excellent electrical and thermal conductivities, and also mechanical properties to form a functional composite with NVP. 29 In spite of this, incorporation of MWCNT reduces polarization by ensuring intimate contact between nanotubes and NVP particles for fast Na-ion transport.…”

“…The conductivity of the material is one of the critical factors impacting its electrochemical performance. Currently, incorporating electrically conductive additives such as porous carbon, graphene, carbon nanotubes (CNTs), and so forth into the NVP matrix or making hybrid with it not only provides a large electrode/electrolyte contact area but also inhibits the overgrowth of particles which ultimately improves the electrochemical performance. , Among all conductive networks, CNTs are considered to be fillers for composite formation because of their stability due to the sp 2 covalent bond. , Distinctly, multiwalled CNTs (MWCNTs) possess a promising conductive framework as well as act as a reducing agent (for V 5+ to V 3+ ) which provides a high surface area, excellent electrical and thermal conductivities, and also mechanical properties to form a functional composite with NVP . In spite of this, incorporation of MWCNT reduces polarization by ensuring intimate contact between nanotubes and NVP particles for fast Na-ion transport. , It also accommodates volume change accompanied due to intercalation/de-intercalation of Na + ions.…”

Impact of MW-CNT/polymer composites matrix type on the electrical and gas-sensitive properties

“…The scientific community has been captivated by the development of novel conductive polymer composite materials (CPCs) with specified and fundamentally new properties as a result of the addition of nanometer-scale components. [1][2][3] The inherently insulating polymers are cheaper in comparison to electrically conductive polymers. Conductive polymers have wide application areas such as electronics and energy storage devices, corrosion inhibitors, pollutant degradation, electromagnetic interference shielding materials, and sensors.…”