Simulation of a Patterned Core–Shell Double-Walled Carbon Nanotube with an Optimal Heat Capacity as Efficient Thermal Conductivity Modules

2022 ◽  
Author(s):  
Marzieh Behrouz ◽  
Mohammad Hadi Ghatee
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Carbon Nanotube ◽  
Core Shell ◽  
Optimal Heat

scholarly journals Thermal Conductivity and Heat Capacity of a Nylon-6∕Multi-wall Carbon Nanotube Composite Under Pressure

2010 ◽  
Author(s):  
Junchun Yu ◽  
Bounphanh Tonpheng ◽  
Ove Andersson ◽  
A. D’Amore ◽  
Domenico Acierno ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Carbon Nanotube ◽  
Nylon 6 ◽  
Carbon Nanotube Composite ◽  
Multi Wall Carbon Nanotube

Thermal Conductivity and Specific Heat Capacity of Carbon Nanotube Bundles

2007 ◽  
Author(s):  
John Shelton ◽  
Frank Pyrtle
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Heat Capacity ◽  
Carbon Nanotube ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Element Analysis ◽  
Single Walled Carbon ◽  
Nanotube Bundles ◽  
Dynamics Simulations

Carbon nanotubes (CNTs) have been thoroughly documented to demonstrate superior heat transfer properties. It has also been determined that these properties decrease substantially as overall dimensions increase from the nanoscale to the microscale. Using non-equilibrium molecular dynamics simulations and finite element analysis, the influence of both internal and external thermal boundary resistance effects on the thermal conductivity and specific heat capacity of single walled carbon nanotube bundles were investigated. Comparisons were made between accepted property values for single CNTs and for CNT bundles. Also, energy transfer between varying sized bundles of single-walled carbon nanotubes (SWCNTs) and a surrounding pressure-driven Lennard-Jones (LJ) fluid were calculated.

scholarly journals Thermal conductivity of liquid/carbon nanotube core-shell nanocomposites

2017 ◽  
Vol 121 (1) ◽  
pp. 015104 ◽  
Author(s):  
Yutaka Yamada ◽  
Alexandros Askounis ◽  
Tatsuya Ikuta ◽  
Koji Takahashi ◽  
Yasuyuki Takata ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
Core Shell ◽  
Liquid Carbon

scholarly journals Influence of alkaline modification on selected properties of banana fiber paperbricks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Abayomi A. Akinwande ◽  
Adeolu A. Adediran ◽  
Oluwatosin A. Balogun ◽  
Oluwaseyi S. Olusoju ◽  
Olanrewaju S. Adesina
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Moisture Absorption ◽  
Water Volume ◽  
Banana Fiber ◽  
Fiber Loading ◽  
Banana Fibers ◽  
Alkaline Modification

AbstractIn a bid to develop paper bricks as alternative masonry units, unmodified banana fibers (UMBF) and alkaline (1 Molar aqueous sodium hydroxide) modified banana fibers (AMBF), fine sand, and ordinary Portland cement were blended with waste paper pulp. The fibers were introduced in varying proportions of 0, 0.5, 1.0 1.5, 2.0, and 2.5 wt% (by weight of the pulp) and curing was done for 28 and 56 days. Properties such as water and moisture absorption, compressive, flexural, and splitting tensile strengths, thermal conductivity, and specific heat capacity were appraised. The outcome of the examinations carried out revealed that water absorption rose with fiber loading while AMBF reinforced samples absorbed lesser water volume than UMBF reinforced samples; a feat occasioned by alkaline treatment of banana fiber. Moisture absorption increased with paper bricks doped with UMBF, while in the case of AMBF-paper bricks, property value was noted to depreciate with increment in AMBF proportion. Fiber loading resulted in improvement of compressive, flexural, and splitting tensile strengths and it was noted that AMBF reinforced samples performed better. The result of the thermal test showed that incorporation of UMBF led to depreciation in thermal conductivity while AMBF infusion in the bricks initiated increment in value. Opposite behaviour was observed for specific heat capacity as UMBF enhanced heat capacity while AMBF led to depreciation. Experimental trend analysis carried out indicates that curing length and alkaline modification of fiber were effective in maximizing the properties of paperbricks for masonry construction.

scholarly journals Testing a Gypsum Composite Based on Raw Gypsum with a Direct Admixture of Paraffin and Polymer to Improve Thermal Properties

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3241
Author(s):  
Krzysztof Powała ◽  
Andrzej Obraniak ◽  
Dariusz Heim
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Thermal Properties ◽  
Phase Change ◽  
Large Scale ◽  
Building Materials ◽  
Residential Buildings ◽  
Energy Performance ◽  
Polymer Content ◽  
Volumetric Heat Capacity

The implemented new legal regulations regarding thermal comfort, the energy performance of residential buildings, and proecological requirements require the design of new building materials, the use of which will improve the thermal efficiency of newly built and renovated buildings. Therefore, many companies producing building materials strive to improve the properties of their products by reducing the weight of the materials, increasing their mechanical properties, and improving their insulating properties. Currently, there are solutions in phase-change materials (PCM) production technology, such as microencapsulation, but its application on a large scale is extremely costly. This paper presents a solution to the abovementioned problem through the creation and testing of a composite, i.e., a new mixture of gypsum, paraffin, and polymer, which can be used in the production of plasterboard. The presented solution uses a material (PCM) which improves the thermal properties of the composite by taking advantage of the phase-change phenomenon. The study analyzes the influence of polymer content in the total mass of a composite in relation to its thermal conductivity, volumetric heat capacity, and diffusivity. Based on the results contained in this article, the best solution appears to be a mixture with 0.1% polymer content. It is definitely visible in the tests which use drying, hardening time, and paraffin absorption. It differs slightly from the best result in the thermal conductivity test, while it is comparable in terms of volumetric heat capacity and differs slightly from the best result in the thermal diffusivity test.

Designing an Interlayer-Widened MoS2-Packed Nitrogen-Rich Carbon Nanotube Core–Shell Structure for Redox-Mediated Quasi-Solid-State Supercapacitors

2021 ◽  
Vol 4 (3) ◽  
pp. 2218-2230
Author(s):  
Sudhakaran Moopri Singer Pandiyarajan ◽  
Ganesh Kumar Veerasubramani ◽  
Roshan Mangal Bhattarai ◽  
Gnanaselvan Gnanasekaran ◽  
Sang Jae Kim ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure
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