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

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.

Авторы
Shchegolkov A.V.2 , Shchegolkov A.V.3 , Zemtsova N.V.2 , Stanishevskiy Y.M. 1 , Vetcher A.A. 1, 4
Журнал
Издательство
MDPI AG
Номер выпуска
1
Язык
Английский
Статус
Опубликовано
Номер
249
Том
15
Год
2023
Организации
  • 1 Российский университет дружбы народов
  • 2 Tambov State Technical University
  • 3 Platov South-Russian State Polytechnic University (NPI)
  • 4 Complementary and Integrative Health Clinic of Dr. Shishonin
Ключевые слова
MWCNTs; catalyst; polyurethane; organosilicon compound; modification; degradation; thermal field
Дата создания
09.01.2023
Дата изменения
09.01.2023
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/93202/
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