Influence of carbon nanotubes content on the properties of acrylonitrile-butadiene rubber/cobalt chloride composites

Shao, Chengli; Wang, Qiang; Mao, Yapeng; Li, Qiuying; Wu, Chifei

doi:10.1088/2053-1591/ab1445

Cited by 6 publications

(4 citation statements)

References 32 publications

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“…Additionally, the electrical percolation threshold obtained was low (1.5 pph). These results indicated the development of three-dimensional conductive networks in the composites, which meant that NBR-CNTs nanocomposites can provide insulation service to electronics [5,81]. The presence of MWCNTs in the prepared, via melt and high-shear mixing methods, NBR-MWCNTs composites reduced the swelling behavior while increasing the crosslink density of the composites; consequently increasing their UTS, M, hardness, abrasion resistance and electrical conductivity (with corresponding low percolation threshold value), and significantly decreasing their volume resistivity [4,18,82,83].…”

Section: Nitrile Butadiene Rubber-cnts Compositesmentioning

confidence: 86%

“…Shao et al [81] observed an improvement in UTS and hardness to about 39% and 101%, respectively, after adding CNTs into NBR, while the εb maintained at high CNTs contents over 100%. They also observed a significant reduction of volume resistivity and an increase in dielectric constant and dielectric loss with an increased CNTs content in the NBR-based nanocomposites.…”

Section: Nitrile Butadiene Rubber-cnts Compositesmentioning

confidence: 99%

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Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Gumede¹,

Carson²,

Hlangothi³

2021

Carbon Nanotubes - Redefining the World of Electronics

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The field of electronics involves complex systems where the active and passive electronic devices are integrated on the rubber substrate, e.g., silicone (Q), which provides, through potting, a strong assembly of these devices on the circuit board. Several other rubbers are employed in the field to strengthen, insulate and seal the components of the electronic machines and instruments, and therefore protect them against damage. These rubbers are typically strengthened and toughened using carbon black (CB). However, due to its noticeable drawbacks, recent research in the field of rubber and electronics has suggested the use of carbon nanotubes (CNTs) as alternative reinforcing fillers to produce electronics rubber composites that do not only have enhanced electrical conductiv¬ity, thermal stability, electromagnetic interference (EMI) shielding, weatherability and insulation properties, but also offer outstanding stretchability, bendability and tear strength under frequent elastic deformation. These performances are similar for both single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) in both the functional and structural composites. Although SWCNTs can result in relatively better homogeneity than MWCNTs, most rubbers often constitute MWCNTs because they are relatively cheaper. The great potential of rubber-CNTs composites being extensively used in the field of electronics is explored in this chapter.

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Section: Nitrile Butadiene Rubber-cnts Compositesmentioning

confidence: 86%

Section: Nitrile Butadiene Rubber-cnts Compositesmentioning

confidence: 99%

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Gumede¹,

Carson²,

Hlangothi³

2021

Carbon Nanotubes - Redefining the World of Electronics

View full text Add to dashboard Cite

show abstract

“…As can be seen from Figure .8(b), when BNNSs are doped into the composite material, their volume resistivity decreases slightly, but the overall value is still higher than that of pure EPDM. This is because that BNNSs was added on the basis of high content kaolin, which inevitably destroys the overall uniformity of rubber, resulting in the decrease of the volume resistivity of the composite material [35,36] .…”

Section: Volume Resistivitymentioning

confidence: 99%

Synergetic enhancement of the electrical-thermal-mechanical properties of EPDM composites modified by Kaolin and BNNSs

Feng,

Deng,

Xiao

et al. 2024

J Polym Res

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Offshore wind power is clean energy with rapid growth in recent years. As a key part of wind turbines, improving the combination performance of wind turbine cable insulation has a crucial impact on the development of wind power systems. In this paper, kaolin is selected to improve the tensile strength of Ethylene-Propylene-Diene Monomer (EPDM) rubber, and Boron Nitride Nanosheeets (BNNSs) with good electrical insulation and thermal conductivity are co-doped into kaolin/EPDM to improve the breakdown strength and thermal conductivity of the composite. The results show that the properties of the composites are improved when the powders are doped into EPDM. When the kaolin doping amount is 30wt%, the dielectric properties and the mechanical properties are improved, but the breakdown strength has deteriorated. Based on 30wt% kaolin content, BNNSs are added to EPDM. The breakdown strength is improved. The breakdown strength of the 30wt% Kaolin/5wt%BNNSs co-doped EPDM is 83.33kV/mm. In addition, due to the synergistic effect between the two powders, the tensile strength of the composite is increased to 8.06MPa. Meanwhile, with the increase of BNNSs, the thermal conductivity of composite is improved. It increases to 1.247 W/(m⋅K) This work has important guiding signi cance for improving the combination performance of the wind turbine cable insulation.

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“…Chromism was employed in the construction of optical humidity sensors by including CoCl 2 in polymers [23][24][25][26]. Furthermore, the presence of CoCl 2 additives [27][28][29] changes the immediate environment of polymer chains, and this is reflected in their molecular dynamics. The fact that the salt contains a transition metal with incompletely filled d-electronic orbitals should not be neglected.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Controlled Chain Dynamics in Polyimide Doped with CoCl2 Probed Using Dynamic Mechanical Analysis

Ionita,

Cristea,

Sava

et al. 2024

Materials

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Cobalt(II) chloride (CoCl2) being in the vicinity of polyimide chains entails modifications in terms of the molecular dynamics, which are mainly governed by the possible presence of amic acid residual groups, by the transition-metal-type characteristics of cobalt and by the CoCl2 content. Polyimide was synthesized using poly(amic acid) according to the reaction of 2,2′-bis(3,4-dicarboxylphenyl)hexafluoropropane dianhydride (6FDA) with 3,3′-dimethyl-4,4′-diaminodiphenylmethane (MMDA) in N,N-dimethylacetamide. CoCl2 was added before the thermal imidization of the poly(amic acid). An experimental approach was designed to establish the interaction between the polyimide and CoCl2 and whether the interaction depends on the quantity of the salt. Evidence for the existence of residual amic acid groups was obtained using second derivative Fourier Transform Infrared Spectroscopy (FTIR) and with the help of 2D correlation spectroscopy (2D-COS). Moreover, FTIR, along with X-ray photoelectron spectroscopy (XPS), revealed the interaction between the polymer and CoCl2, primarily in the form of Co(II)-N coordinated bonds. Nevertheless, the coordination of cobalt with suitable atoms from the amic acid groups is not precluded. The results of dynamic mechanical analysis (DMA) featured a specific relaxation assigned to the presence of CoCl2 in the polymeric film and demonstrated that its (non)reinforcing effect depends on its content in the polyimide.

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Influence of carbon nanotubes content on the properties of acrylonitrile-butadiene rubber/cobalt chloride composites

Cited by 6 publications

References 32 publications

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Synergetic enhancement of the electrical-thermal-mechanical properties of EPDM composites modified by Kaolin and BNNSs

Temperature-Controlled Chain Dynamics in Polyimide Doped with CoCl2 Probed Using Dynamic Mechanical Analysis

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