Electrically Conductive Silicone/Organic Polymer Composites

Joshi, Aparna M.; Athawale, Anjali A.

doi:10.1007/s12633-013-9171-1

Cited by 17 publications

(8 citation statements)

References 13 publications

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“…Conductive composites based on organosilicon elastomers (silicones) [ 22 ] may have a functional feature associated with self-regulation of the heating temperature [ 23 ]. Studies related to the effect of MWCNTs on heat release in a flexible nanomodified elastomer are presented in the work and it was found that the heat release power can be represented in the form of regression equations, where there is a dependence of heat release on temperature, applied tensile strain and electrical heating [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

Shchegolkov

Zemtsova

et al. 2023

Polymers

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The development of reliable and effective functional materials that can be used in various technological fields and environmental conditions is one of the goals of modern nanotechnology. Heating elements’ manufacturing requires understanding the laws of heat transfer under conditions of different supply voltages, as this expands the possibilities of such materials’ application. Elastomers based on silicon-organic compounds and polyurethane modified with multi-walled carbon nanotubes (MWCNTs) were studied at various concentrations of Ni/MgO or Co-Mo/MgO and voltages (220, 250, and 300 V). It was found that an increase in voltage from 220 to 300 V leads to an initial increase in specific power on one-third followed by a subsequent decrease in a specific power when switched on again to 220 V (for −40 °C) of up to ~44%. In turn, for a polyurethane matrix, an increase in voltage to 300 V leads to an initial peak power value of ~15% and a decrease in power when switched on again by 220 V (for −40 °C) to ~36% (Ni/MgO -MWCNT). The conducted studies have shown that the use of a polyurethane matrix reduces power degradation (associated with voltage surges above 220 V) by 2.59% for Ni/MgO–based MWCNT and by 10.42% for Co-Mo/MgO. This is due to the better heat resistance of polyurethane and the structural features of the polymer and the MWCNT. The current studies allow us to take the next step in the development of functional materials for electric heating and demonstrate the safety of using heaters at a higher voltage of up to 300 V, which does not lead to their ignition, but only causes changes in electrophysical parameters.

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Section: Introductionmentioning

confidence: 99%

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

Shchegolkov

Zemtsova

et al. 2023

Polymers

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“…Electromagnetic (EM) wave absorbing materials have been the focus of many investigations due to their importance in controlling the levels of EM waves emitted by electronic equipment. Joshi and Athawale 1 explained that these materials are also environmentally important tools against the possible dangers of these waves being absorbed by the human body and also in electronic war, since they can be used to hide targets from tracking equipment. One of the most important applications is in military systems.…”

Section: Introductionmentioning

confidence: 99%

“…The radar cross section (RCS) is a measurement of the strength of the radar signal backscattered from a target object for a given incident EM wave that helps to identify the goals. Kim and Lee 3 reported that there are two main methods frequently used in military industries in order to reduce the RCS of goals: (1) changing the shape of the target and (2) using a radarabsorbing material (RAM) or making a radar-absorbing structure (RAS). Composite materials consisting of two main parts of matrix and reinforcements provide special manufacturing and mechanical properties for the production of EM wave absorbing materials.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of broadband radar-absorbing composite structures based on different compositions, processing, and geometric parameters

Danesh

Beheshti

Heidari-Rarani

2022

Journal of Reinforced Plastics and Composites

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The main challenge in the design of radar-absorbing composite structures (RASs) is that there is a variety of different parameters affecting the absorbing performance. In this study, these parameters are categorized into: (1) reinforcing materials including fabric types (i.e., glass fabric, carbon fabric, and 3D fabric) and filler types (i.e., carbon black, carbonyl iron, and polyaniline); (2) geometric parameters including layer thickness and stacking sequences; and (3) manufacturing methods. Up to now, the effect of all these parameters has not been simultaneously investigated and optimized on the X-band radar-absorbing feature of composite structures. Therefore, the influence of all these parameters is first experimentally investigated using waveguide tests; then, a new multi-objective optimization algorithm based on NSGA II technique is developed to simultaneously optimize the effective parameters for high-performance RAS with maximum average reflection loss and minimum weight, while considering structural limitations. Finally, the proposed algorithm is evaluated by experimental results.

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“…However, these carbon‐based nanofillers are not suitable for colorless and transparent antistatic MVQ because of their black color. In addition, some polymers, such as polyaniline and poly(3,4‐ethylene dioxythiophene), can serve as antistatic materials, but these polymers also decrease the transparency of MVQ. Therefore, a special antistatic agent with excellent and highly efficient antistatic performance that does not change the color or transparency of MVQ is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Antistatic effects and mechanism of ionic liquids for methyl vinyl silicone rubber

Guo

Zeng

2017

J of Applied Polymer Sci

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The effect of two ionic liquids (ILs), namely, 1‐allyl‐3‐methyl imidazolium chloride ([AMIM]Cl) and 1‐ethyl‐3‐methyl imidazolium tetrafluoroborate ([EMIM]BF4), on the surface and volume resistivities, mechanical properties, transparency, and water contact angle of methyl vinyl silicone rubber (MVQ) were investigated. The chemical structures of the two ILs before and after heat treatment were characterized by Fourier transform infrared spectroscopy. The morphology and fluorine and chlorine elemental dispersion were characterized by field emission scanning electron microscopy and energy‐dispersive X‐ray spectroscopy mapping, respectively. The antistatic mechanism was revealed. The results show that the MVQ–[EMIM]BF4 composites had lower surface and volume resistivities than the MVQ–[AMIM]Cl composites. The mechanical properties of the MVQ–[EMIM]BF4 and MVQ–[AMIM]Cl composites were slightly lower than those of the pristine MVQ. With increasing [EMIM]BF4 content, the surface and volume resistivities and water contact angle of the MVQ–[EMIM]BF4 composites decreased. When the content of [EMIM]BF4 was 2.0 phr, the MVQ–[EMIM]BF4 composites showed better antistatic performance with lower surface and volume resistivities of 9.6 × 109 Ω and 1.2 × 1011 Ω cm, respectively. The antistatic mechanism of the MVQ–IL composites was ascribed to the synergistic effect of ionic migration and moisture absorption. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45180.

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Electrically Conductive Silicone/Organic Polymer Composites

Cited by 17 publications

References 13 publications

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

Changes in the Electrophysical Parameters of Nanomodified Elastomers Caused by Electric Current’s Passage

Optimal design of broadband radar-absorbing composite structures based on different compositions, processing, and geometric parameters

Antistatic effects and mechanism of ionic liquids for methyl vinyl silicone rubber

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