Preparation and electromagnetic shielding effectiveness of cobalt ferrite nanoparticles/carbon nanotubes composites

Abstract

Here, the cobalt ferrite/carbon nanotubes nanocomposites were directly synthesized by a facile hydrothermal method at 200 C using benzyl alcohol as the solvent. The crystal and morphological structures as well as electromagnetic shielding performance at Ku band (12-18 GHz) were thoroughly investigated. Cobalt ferrite nanoparticles with a diameter around 6-10 nm were anchored on the surface of carbon nanotubes with some aggregation. It is found that the as-prepared nanocomposites exhibit excellent electromagnetic shielding performance with values 22-25 dB in the Ku frequency range with a thickness of 2 mm. The small cobalt ferrite nanoparticles offer a large number of polarization and magnetization active sites to improve the electromagnetic performance by the incorporation of carbon nanotubes.

Resistance-strain sensitive rubber composites filled by multiwalled carbon nanotubes for structuraldeformation monitoring

“…Carbon nanotubes (CNTs), which are used to fill polymer composites, have attracted much research attention in recent years due to high specific surface area, high aspect ratio, excellent electrical properties, 9 –11 electromagnetic shielding properties, 12 and good free radical scavenging ability. 13 However, the issues of dispersion and interfacial interaction between CNTs and matrix are still a problem that limits their application.…”

“…Therefore, nanofiller-rubber composites, which combine the properties with the high electrical conductivity of the nanofillers and flexible deformation characteristics of the rubber matrix, have the potential to meet the requirements for the bearing health monitoring. [6][7][8] Carbon nanotubes (CNTs), which are used to fill polymer composites, have attracted much research attention in recent years due to high specific surface area, high aspect ratio, excellent electrical properties, [9][10][11] electromagnetic shielding properties, 12 and good free radical scavenging ability. 13 However, the issues of dispersion and interfacial interaction between CNTs and matrix are still a problem that limits their application.…”

Electrical resistivity of Sn–3.0Ag–0.5Cu solder joint with the incorporation of carbon nanotubes

“…Considering these aspects, CNT-based nanocomposites may find different potential technological applications. [9][10][11][12] There are numerous works studied on solder system with CNTs that showed the IMC layer growth and the mechanical properties. [13][14][15] While concerning on controlling the IMC layer growth and expand the integrity of solder joint, electrical properties of solder joint supposedly not to be neglected due to the main functionality.…”

Studies of electrical, thermal, and mechanical properties of single-walled carbon nanotube and polyaniline of nanoporous nanocomposites

“…As a result, simple and direct dispersion of 1-25 wt% of nanotubes into polymers leads to significantly lower electrical and mechanical properties. 11,[29][30][31][32][33][34][35][36][37] To avoid bundling and slippage of nanotubes at its surface, there is a solution-based fabrication method, followed by in situ polymerization, which desirably improves the electrical and mechanical properties. 11,30,[36][37][38][39][40][41][42][43][44][45][46] In this work, we fabricated SWCNT/PANI nanoporous composite aerogels by using the method of a hydrogel of SWCNT and followed by in situ polymerization.…”

“…11,[29][30][31][32][33][34][35][36][37] To avoid bundling and slippage of nanotubes at its surface, there is a solution-based fabrication method, followed by in situ polymerization, which desirably improves the electrical and mechanical properties. 11,30,[36][37][38][39][40][41][42][43][44][45][46] In this work, we fabricated SWCNT/PANI nanoporous composite aerogels by using the method of a hydrogel of SWCNT and followed by in situ polymerization. Camphor sulfonic acid (CSA) is used to increase electron transport in these nanoporous composite scaffolds.…”