High‐efficient multifunctional self‐heating nanocomposite‐based MWCNTs for energy applications

Abstract

Self-heating of nanocomposite materials based on the joule heating effect is suitable for numerous engineering applications. In this study, a highefficiency self-heating nanocomposite, using high conductive multi-walled carbon nanotubes (MWCNTs)-based phenolic resin, was fabricated with a hot press method. The microstructure and the thermal stability of self-heating nanocomposite were studied by X-ray diffraction, scanning electronic microscopy, and thermogravimetric tests. Electromechanical and thermal performance tests were conducted to investigate their potential as a self-heating application. Results showed that the compressive strength, modulus, and the piezo-resistive behaviour were higher after adding MWCNTs to the phenolic resin, indicating better load transfer and self-damage sensing as well. Moreover, at 4.0 wt% of MWCNTs concentration, the electrical conductivity of a self-heating nanocomposite showed a higher value of 13.26 S/m which was also found to be proportionally increased with the thickness of the samples, it was ≈25.5 and ≈12.8 S/m for 10 and 3 mm, respectively. In addition, a steady-state temperature of ≈110°C could be reached at low applied volts (8 V) as well as its heating performance was significantly dependent on the input power and the thickness of the sample. This is also confirmed by statistical results between the sample with thicknesses of 3 and 10 mm in terms of power consumption with P value ≈ .0001. Furthermore, the influence of Joule heating was estimated analytically based on the one-dimensional heat transfer equation in companying with other previous models. The estimated distributed temperatures values were in good agreement with the experimental results. The selfheating nanocomposite described in this study has the potential to be used in various industrial applications and a wide range of sectors due to its ability to self-damage sensing, easy fabrication, and high heating efficiency at low power consumption.

Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature

“…Therefore, we studied the electro-mechanical behavior of CNT/epoxy composite with 65 • C of the glass transition temperature [29] under static as well as cyclic compressive loadings. Figure 6a showed the change in resistance of 1.0 wt % CNT/epoxy composites under the static compressive loading at various temperatures.…”

“…Although there has been much research on the effect of temperature on electrical properties of carbon nanotube reinforced composites at rest, there has been no research on the electro-mechanical behavior of those materials under the different temperatures. Therefore, we studied the electromechanical behavior of CNT/epoxy composite with 65 °C of the glass transition temperature [29] application. Considering their glass transition temperature (Tg) of 65 °C, Tg significantly affects the electro-mechanical response of CNT/epoxy composites.…”

Evaluation of (CNT@CIP)-Embedded Magneto-Resistive Sensor Based on Carbon Nanotube and Carbonyl Iron Powder Polymer Composites

“…Expeditious advancements of conductive polymeric composites (CPCs) have been gaining attention due to their high applicability, such as multi-functional sensors [1][2][3], electrical-heating composites [4][5][6], electromagnetic interference shielding composites [7][8][9], and other electronic devices [10,11]. Various kinds of conductive fillers including carbonbased fillers such as graphene, and carbon nanotubes and magnetic powder have been used to fabricate the CPCs due to their high electrical conductivity [11][12][13].…”

H 2 ‐induced thermal treatment significantly influences the development of a high performance low‐platinum core‐shell PtNi/C alloyed oxygen reduction catalyst

“…22 Thermal treatment is also among the meaningful protocols in improving the catalytic activity of Pt-based catalyst for oxygen reduction, enhancing the interaction of Pt with supports and nonprecious metals and maximizing the utilization of noble metal Pt. 23,24 Nickel is an abundant transitional metal, commonly used as the active substituting and modification element in preparing the high performance alloyed ORR catalysts through the substituting, interacting and alloying with Pt. [25][26][27] For instance, Li et al 28 converted the Pt/NiO core/shell nanowires to PtNi alloy nanowires and jagged Pt nanowires with the thermal annealing and electrochemical dealloying processes, significantly improved the catalyst mass activity.…”

“…Because alloying can obviously enhance the specific and mass activity of Pt‐based catalysts . Thermal treatment is also among the meaningful protocols in improving the catalytic activity of Pt‐based catalyst for oxygen reduction, enhancing the interaction of Pt with supports and nonprecious metals and maximizing the utilization of noble metal Pt …”